diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
new file mode 100644
index 0000000000..f644df919d
--- /dev/null
+++ b/.github/workflows/maven.yml
@@ -0,0 +1,54 @@
+# This workflow will build a package using Maven and then publish it to GitHub packages when a release is created
+# For more information see: https://github.com/actions/setup-java/blob/main/docs/advanced-usage.md#apache-maven-with-a-settings-path
+
+name: Java CI with Maven
+
+on:
+  push:
+    branches:
+      - v0.6-cache
+
+env:
+  ES_JAVA_OPTS: "-Xms256m -Xmx512m"
+  BUILD_MAVEN_OPTS: "-DskipTests=true --batch-mode --also-make"
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Cache Maven packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+
+      - name: Get branch name
+        run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
+        id: get_branch
+
+      - name: Build with Maven
+      - run: |
+          branch_name=${{ steps.get_branch.outputs.branch }}
+          if [[ $branch_name == ' v0.6-cache' ]]
+          then
+              echo "Building branch ${branch_name}"
+              mvn clean install -Dcheckstyle.skip -Drat.skip=true -Dit.skip=true -Denforcer.skip=true -Dmaven.javadoc.skip=true ${{ env.BUILD_MAVEN_OPTS }}
+
+
+      - name: Publish to GitHub Packages Apache Maven
+        run: mvn --batch-mode deploy
+        env:
+          GITHUB_TOKEN: ${{ secrets.my_pat }}
diff --git a/janusgraph-all/pom.xml b/janusgraph-all/pom.xml
index ec98a12095..8c91b8dd62 100644
--- a/janusgraph-all/pom.xml
+++ b/janusgraph-all/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-all</artifactId>
diff --git a/janusgraph-backend-testutils/pom.xml b/janusgraph-backend-testutils/pom.xml
index f09b3d8566..6af33eeb92 100644
--- a/janusgraph-backend-testutils/pom.xml
+++ b/janusgraph-backend-testutils/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-backend-testutils</artifactId>
diff --git a/janusgraph-berkeleyje/pom.xml b/janusgraph-berkeleyje/pom.xml
index 10f0b828cc..baaec5e110 100644
--- a/janusgraph-berkeleyje/pom.xml
+++ b/janusgraph-berkeleyje/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-berkeleyje</artifactId>
diff --git a/janusgraph-bigtable/pom.xml b/janusgraph-bigtable/pom.xml
index f64fdb8d2d..eb7e5ec38c 100644
--- a/janusgraph-bigtable/pom.xml
+++ b/janusgraph-bigtable/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-bigtable</artifactId>
diff --git a/janusgraph-core/pom.xml b/janusgraph-core/pom.xml
index 975cfe7ae1..fb62044642 100644
--- a/janusgraph-core/pom.xml
+++ b/janusgraph-core/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-core</artifactId>
diff --git a/janusgraph-core/src/main/java/org/janusgraph/diskstorage/keycolumnvalue/cache/RedissonCache.java b/janusgraph-core/src/main/java/org/janusgraph/diskstorage/keycolumnvalue/cache/RedissonCache.java
index 2717034fcd..fef12e82d5 100644
--- a/janusgraph-core/src/main/java/org/janusgraph/diskstorage/keycolumnvalue/cache/RedissonCache.java
+++ b/janusgraph-core/src/main/java/org/janusgraph/diskstorage/keycolumnvalue/cache/RedissonCache.java
@@ -7,13 +7,18 @@
 import org.redisson.api.RedissonClient;
 import org.redisson.config.Config;
 import org.redisson.config.ReadMode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.Arrays;
+import java.util.Objects;
 
 import static org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration.*;
 
 public class RedissonCache {
 
+    private static RedissonClient client;
+    private static final Logger log = LoggerFactory.getLogger(RedissonCache.class);
     private static final String REDIS_URL_PREFIX = "redis://";
     private static final String COMMA = ",";
     private static final String JANUSGRAPH_REDIS = "janusgraph-redis";
@@ -25,41 +30,47 @@ public class RedissonCache {
     private static long watchdogTimeoutInMS;
 
     public static RedissonClient getRedissonClient(Configuration configuration) {
-        redisServerMode = configuration.get(REDIS_CACHE_SERVER_MODE);
-        connectTimeout = configuration.get(REDIS_CACHE_CONNECTION_TIME_OUT);
-        keepAlive = configuration.get(REDIS_CACHE_KEEP_ALIVE);
-        watchdogTimeoutInMS = configuration.get(REDIS_CACHE_LOCK_WATCHDOG_TIMEOUT_MS);
-
-        Config config = new Config();
-        switch (redisServerMode) {
-            case SENTINEL:
-                config.setLockWatchdogTimeout(watchdogTimeoutInMS)
-                    .useSentinelServers()
-                    .setClientName(JANUSGRAPH_REDIS)
-                    .setReadMode(ReadMode.MASTER_SLAVE)
-                    .setCheckSentinelsList(false)
-                    .setConnectTimeout(connectTimeout)
-                    .setKeepAlive(keepAlive)
-                    .setMasterName(configuration.get(REDIS_CACHE_MASTER_NAME))
-                    .addSentinelAddress(formatUrls(configuration.get(REDIS_CACHE_SENTINEL_URLS).split(COMMA)))
-                    .setUsername(configuration.get(REDIS_CACHE_USERNAME))
-                    .setPassword(configuration.get(REDIS_CACHE_PASSWORD));
-                break;
-            case STANDALONE:
-                config.setLockWatchdogTimeout(watchdogTimeoutInMS)
-                    .useSingleServer()
-                    .setClientName(JANUSGRAPH_REDIS)
-                    .setAddress(formatUrls(configuration.get(REDIS_CACHE_SERVER_URL).split(COMMA))[0])
-                    .setConnectTimeout(connectTimeout)
-                    .setKeepAlive(keepAlive)
-                    .setUsername(configuration.get(REDIS_CACHE_USERNAME))
-                    .setPassword(configuration.get(REDIS_CACHE_PASSWORD));
-                break;
-            default:
-                throw new JanusGraphConfigurationException("Invalid redis server mode");
+        synchronized (RedissonClient.class) {
+            if (Objects.isNull(client)) {
+                redisServerMode = configuration.get(REDIS_CACHE_SERVER_MODE);
+                connectTimeout = configuration.get(REDIS_CACHE_CONNECTION_TIME_OUT);
+                keepAlive = configuration.get(REDIS_CACHE_KEEP_ALIVE);
+                watchdogTimeoutInMS = configuration.get(REDIS_CACHE_LOCK_WATCHDOG_TIMEOUT_MS);
+                log.info("Creating connection for redis:{}", redisServerMode);
+                System.out.println("Creating connection for redis:"+redisServerMode);
+                Config config = new Config();
+                switch (redisServerMode) {
+                    case SENTINEL:
+                        config.setLockWatchdogTimeout(watchdogTimeoutInMS)
+                            .useSentinelServers()
+                            .setClientName(JANUSGRAPH_REDIS)
+                            .setReadMode(ReadMode.MASTER_SLAVE)
+                            .setCheckSentinelsList(false)
+                            .setConnectTimeout(connectTimeout)
+                            .setKeepAlive(keepAlive)
+                            .setMasterName(configuration.get(REDIS_CACHE_MASTER_NAME))
+                            .addSentinelAddress(formatUrls(configuration.get(REDIS_CACHE_SENTINEL_URLS).split(COMMA)))
+                            .setUsername(configuration.get(REDIS_CACHE_USERNAME))
+                            .setPassword(configuration.get(REDIS_CACHE_PASSWORD));
+                        break;
+                    case STANDALONE:
+                        config.setLockWatchdogTimeout(watchdogTimeoutInMS)
+                            .useSingleServer()
+                            .setClientName(JANUSGRAPH_REDIS)
+                            .setAddress(formatUrls(configuration.get(REDIS_CACHE_SERVER_URL).split(COMMA))[0])
+                            .setConnectTimeout(connectTimeout)
+                            .setKeepAlive(keepAlive)
+                            .setUsername(configuration.get(REDIS_CACHE_USERNAME))
+                            .setPassword(configuration.get(REDIS_CACHE_PASSWORD));
+                        break;
+                    default:
+                        throw new JanusGraphConfigurationException("Invalid redis server mode");
+                }
+                client = Redisson.create(config);
+            }
         }
 
-        return Redisson.create(config);
+        return client;
     }
 
     private static String[] formatUrls(String[] urls) throws IllegalArgumentException {
diff --git a/janusgraph-cql/pom.xml b/janusgraph-cql/pom.xml
index 44df3de4fd..9a35e5de03 100644
--- a/janusgraph-cql/pom.xml
+++ b/janusgraph-cql/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
     </parent>
 
     <artifactId>janusgraph-cql</artifactId>
@@ -126,19 +126,6 @@
             <artifactId>java-driver-core</artifactId>
             <version>${cassandra-driver.version}</version>
             <exclusions>
-
-                <exclusion>
-                    <groupId>io.projectreactor</groupId>
-                    <artifactId>reactor-core</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.reactivestreams</groupId>
-                    <artifactId>reactive-streams</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>io.reactivex.rxjava3</groupId>
-                    <artifactId>rxjava</artifactId>
-                </exclusion>
                 <exclusion>
                     <groupId>org.json</groupId>
                     <artifactId>json</artifactId>
diff --git a/janusgraph-dist/pom.xml b/janusgraph-dist/pom.xml
index d74ecc9009..d0d5ce708a 100644
--- a/janusgraph-dist/pom.xml
+++ b/janusgraph-dist/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <packaging>pom</packaging>
diff --git a/janusgraph-doc/pom.xml b/janusgraph-doc/pom.xml
index 97843e2744..42697e2ee0 100644
--- a/janusgraph-doc/pom.xml
+++ b/janusgraph-doc/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <packaging>pom</packaging>
diff --git a/janusgraph-driver/pom.xml b/janusgraph-driver/pom.xml
index 74fa381461..b4a83f6e15 100644
--- a/janusgraph-driver/pom.xml
+++ b/janusgraph-driver/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-driver</artifactId>
diff --git a/janusgraph-es/pom.xml b/janusgraph-es/pom.xml
index debde022c3..fc9d7cf408 100644
--- a/janusgraph-es/pom.xml
+++ b/janusgraph-es/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-es</artifactId>
diff --git a/janusgraph-examples/example-berkeleyje/pom.xml b/janusgraph-examples/example-berkeleyje/pom.xml
index 6785363200..064f05e273 100644
--- a/janusgraph-examples/example-berkeleyje/pom.xml
+++ b/janusgraph-examples/example-berkeleyje/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph-examples</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>example-berkeleyje</artifactId>
diff --git a/janusgraph-examples/example-berkeleyje/pom.xml.versionsBackup b/janusgraph-examples/example-berkeleyje/pom.xml.versionsBackup
new file mode 100644
index 0000000000..6785363200
--- /dev/null
+++ b/janusgraph-examples/example-berkeleyje/pom.xml.versionsBackup
@@ -0,0 +1,41 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.janusgraph</groupId>
+        <artifactId>janusgraph-examples</artifactId>
+        <version>0.6.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>example-berkeleyje</artifactId>
+    <packaging>pom</packaging>
+    <name>Example-BerkeleyJE: BerkeleyJE Storage, Lucene Index</name>
+    <url>https://janusgraph.org</url>
+
+    <dependencies>
+        <!-- These are all runtime dependencies -->
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>example-common</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>janusgraph-berkeleyje</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>janusgraph-lucene</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <example.main.class>org.janusgraph.example.JanusGraphApp</example.main.class>
+        <example.config>${project.basedir}/conf/jgex-berkeleyje.properties</example.config>
+    </properties>
+
+</project>
diff --git a/janusgraph-examples/example-common/pom.xml b/janusgraph-examples/example-common/pom.xml
index 8803c4da8d..54e40ee9fb 100644
--- a/janusgraph-examples/example-common/pom.xml
+++ b/janusgraph-examples/example-common/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph-examples</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>example-common</artifactId>
diff --git a/janusgraph-examples/example-common/pom.xml.versionsBackup b/janusgraph-examples/example-common/pom.xml.versionsBackup
new file mode 100644
index 0000000000..8803c4da8d
--- /dev/null
+++ b/janusgraph-examples/example-common/pom.xml.versionsBackup
@@ -0,0 +1,26 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.janusgraph</groupId>
+        <artifactId>janusgraph-examples</artifactId>
+        <version>0.6.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>example-common</artifactId>
+    <name>Example-Common: Common Graph Code for Examples</name>
+    <url>https://janusgraph.org</url>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>janusgraph-core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <example.main.class>org.janusgraph.example.JanusGraphApp</example.main.class>
+        <example.config>${project.basedir}/conf/jgex-inmemory.properties</example.config>
+    </properties>
+
+</project>
diff --git a/janusgraph-examples/example-cql/pom.xml b/janusgraph-examples/example-cql/pom.xml
index 1368c4e299..09c31d2c49 100644
--- a/janusgraph-examples/example-cql/pom.xml
+++ b/janusgraph-examples/example-cql/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph-examples</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>example-cql</artifactId>
diff --git a/janusgraph-examples/example-cql/pom.xml.versionsBackup b/janusgraph-examples/example-cql/pom.xml.versionsBackup
new file mode 100644
index 0000000000..1368c4e299
--- /dev/null
+++ b/janusgraph-examples/example-cql/pom.xml.versionsBackup
@@ -0,0 +1,42 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.janusgraph</groupId>
+        <artifactId>janusgraph-examples</artifactId>
+        <version>0.6.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>example-cql</artifactId>
+    <packaging>pom</packaging>
+    <name>Example-Cql: Cassandra CQL Storage, Elasticsearch Index</name>
+    <url>https://janusgraph.org</url>
+
+    <dependencies>
+        <!-- These are all runtime dependencies -->
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>example-common</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>janusgraph-cql</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>janusgraph-es</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <example.main.class>org.janusgraph.example.JanusGraphApp</example.main.class>
+        <example.config>${project.basedir}/conf/jgex-cql.properties</example.config>
+        <logback.config>${project.basedir}/conf/logback.xml</logback.config>
+    </properties>
+
+</project>
diff --git a/janusgraph-examples/example-hbase/pom.xml b/janusgraph-examples/example-hbase/pom.xml
index 658aa53fa5..3df79ec352 100644
--- a/janusgraph-examples/example-hbase/pom.xml
+++ b/janusgraph-examples/example-hbase/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph-examples</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>example-hbase</artifactId>
diff --git a/janusgraph-examples/example-hbase/pom.xml.versionsBackup b/janusgraph-examples/example-hbase/pom.xml.versionsBackup
new file mode 100644
index 0000000000..658aa53fa5
--- /dev/null
+++ b/janusgraph-examples/example-hbase/pom.xml.versionsBackup
@@ -0,0 +1,48 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.janusgraph</groupId>
+        <artifactId>janusgraph-examples</artifactId>
+        <version>0.6.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>example-hbase</artifactId>
+    <packaging>pom</packaging>
+    <name>Example-HBase: HBase Storage, Solr Index</name>
+    <url>https://janusgraph.org</url>
+
+    <dependencies>
+        <!-- These are all runtime dependencies -->
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>example-common</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>janusgraph-hbase</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.hbase</groupId>
+            <artifactId>hbase-shaded-client</artifactId>
+            <version>${hbase1.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>janusgraph-solr</artifactId>
+            <version>${project.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <example.main.class>org.janusgraph.example.JanusGraphApp</example.main.class>
+        <example.config>${project.basedir}/conf/jgex-hbase-solr-cloud.properties</example.config>
+        <logback.config>${project.basedir}/conf/logback.xml</logback.config>
+    </properties>
+
+</project>
diff --git a/janusgraph-examples/example-remotegraph/pom.xml b/janusgraph-examples/example-remotegraph/pom.xml
index 2481eafe5d..5c6e51d814 100644
--- a/janusgraph-examples/example-remotegraph/pom.xml
+++ b/janusgraph-examples/example-remotegraph/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph-examples</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>example-remotegraph</artifactId>
diff --git a/janusgraph-examples/example-remotegraph/pom.xml.versionsBackup b/janusgraph-examples/example-remotegraph/pom.xml.versionsBackup
new file mode 100644
index 0000000000..2481eafe5d
--- /dev/null
+++ b/janusgraph-examples/example-remotegraph/pom.xml.versionsBackup
@@ -0,0 +1,35 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.janusgraph</groupId>
+        <artifactId>janusgraph-examples</artifactId>
+        <version>0.6.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>example-remotegraph</artifactId>
+    <name>Example-RemoteGraph: Example with RemoteGraph</name>
+    <url>https://janusgraph.org</url>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>example-common</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.tinkerpop</groupId>
+            <artifactId>gremlin-driver</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.tinkerpop</groupId>
+            <artifactId>gremlin-server</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <example.main.class>org.janusgraph.example.RemoteGraphApp</example.main.class>
+        <example.config>${project.basedir}/conf/jgex-remote.properties</example.config>
+    </properties>
+
+</project>
diff --git a/janusgraph-examples/example-tinkergraph/pom.xml b/janusgraph-examples/example-tinkergraph/pom.xml
index b2e0ca670e..8f7f4f4a41 100644
--- a/janusgraph-examples/example-tinkergraph/pom.xml
+++ b/janusgraph-examples/example-tinkergraph/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph-examples</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>example-tinkergraph</artifactId>
diff --git a/janusgraph-examples/example-tinkergraph/pom.xml.versionsBackup b/janusgraph-examples/example-tinkergraph/pom.xml.versionsBackup
new file mode 100644
index 0000000000..b2e0ca670e
--- /dev/null
+++ b/janusgraph-examples/example-tinkergraph/pom.xml.versionsBackup
@@ -0,0 +1,30 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.janusgraph</groupId>
+        <artifactId>janusgraph-examples</artifactId>
+        <version>0.6.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>example-tinkergraph</artifactId>
+    <name>Example-TinkerGraph: Example with TinkerGraph</name>
+    <url>https://janusgraph.org</url>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.janusgraph</groupId>
+            <artifactId>example-common</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.tinkerpop</groupId>
+            <artifactId>tinkergraph-gremlin</artifactId>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <example.main.class>org.janusgraph.example.TinkerGraphApp</example.main.class>
+        <example.config>${project.basedir}/conf/jgex-tinkergraph.properties</example.config>
+    </properties>
+
+</project>
diff --git a/janusgraph-examples/pom.xml b/janusgraph-examples/pom.xml
index 4fd72a62e9..4568cd7f7f 100644
--- a/janusgraph-examples/pom.xml
+++ b/janusgraph-examples/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-examples</artifactId>
diff --git a/janusgraph-grpc/pom.xml b/janusgraph-grpc/pom.xml
index 4ef87a1bad..4647ea83f6 100644
--- a/janusgraph-grpc/pom.xml
+++ b/janusgraph-grpc/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
     </parent>
     <artifactId>janusgraph-grpc</artifactId>
     <name>JanusGraph-gRPC: gRPC Components for JanusGraph</name>
diff --git a/janusgraph-hadoop/pom.xml b/janusgraph-hadoop/pom.xml
index ef0633af3a..2cc4b21991 100644
--- a/janusgraph-hadoop/pom.xml
+++ b/janusgraph-hadoop/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-hadoop</artifactId>
diff --git a/janusgraph-hbase/pom.xml b/janusgraph-hbase/pom.xml
index aa96e17816..e8188a93f6 100644
--- a/janusgraph-hbase/pom.xml
+++ b/janusgraph-hbase/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
     </parent>
     <artifactId>janusgraph-hbase</artifactId>
     <name>JanusGraph-HBase: Distributed Graph Database</name>
diff --git a/janusgraph-inmemory/pom.xml b/janusgraph-inmemory/pom.xml
index bdb707d24e..73f0075a98 100644
--- a/janusgraph-inmemory/pom.xml
+++ b/janusgraph-inmemory/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-inmemory</artifactId>
diff --git a/janusgraph-lucene/pom.xml b/janusgraph-lucene/pom.xml
index ef35094572..6cc41a00d2 100644
--- a/janusgraph-lucene/pom.xml
+++ b/janusgraph-lucene/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-lucene</artifactId>
diff --git a/janusgraph-server/pom.xml b/janusgraph-server/pom.xml
index f7fd56e2ea..a73be3584f 100644
--- a/janusgraph-server/pom.xml
+++ b/janusgraph-server/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
     </parent>
     <artifactId>janusgraph-server</artifactId>
     <name>JanusGraph-Server: Server Components for JanusGraph</name>
diff --git a/janusgraph-solr/pom.xml b/janusgraph-solr/pom.xml
index bf80edd547..9c1b82111e 100644
--- a/janusgraph-solr/pom.xml
+++ b/janusgraph-solr/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-solr</artifactId>
diff --git a/janusgraph-test/pom.xml b/janusgraph-test/pom.xml
index dde4466643..26d886a909 100644
--- a/janusgraph-test/pom.xml
+++ b/janusgraph-test/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.janusgraph</groupId>
         <artifactId>janusgraph</artifactId>
-        <version>0.6.0</version>
+        <version>0.6.6</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>janusgraph-test</artifactId>
diff --git a/pom.xml b/pom.xml
index c3ba3f765f..6c4fb5d2a3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.janusgraph</groupId>
     <artifactId>janusgraph</artifactId>
-    <version>0.6.0</version>
+    <version>0.6.6</version>
     <packaging>pom</packaging>
     <prerequisites>
         <maven>3.0.0</maven>
diff --git a/pom.xml.versionsBackup b/pom.xml.versionsBackup
new file mode 100644
index 0000000000..c3ba3f765f
--- /dev/null
+++ b/pom.xml.versionsBackup
@@ -0,0 +1,1589 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.janusgraph</groupId>
+    <artifactId>janusgraph</artifactId>
+    <version>0.6.0</version>
+    <packaging>pom</packaging>
+    <prerequisites>
+        <maven>3.0.0</maven>
+    </prerequisites>
+    <name>JanusGraph: Distributed Graph Database</name>
+    <url>https://janusgraph.org</url>
+
+    <description>
+        JanusGraph is a distributed graph database optimized for processing massive-scale graphs represented over a machine
+        cluster.
+        JanusGraph separates the concerns of graph processing and manipulation from storing the graph on disk,
+        delegating that concern to an extensible set of persistence solutions.
+    </description>
+    <developers>
+        <developer>
+            <name>Matthias Broecheler</name>
+            <email>me@matthiasb.com</email>
+            <url>http://matthiasb.com</url>
+        </developer>
+        <developer>
+            <name>Daniel LaRocque</name>
+            <email>dalaro@hopcount.org</email>
+        </developer>
+        <developer>
+            <name>Pavel Yaskevich</name>
+            <email>povel.y@gmail.com</email>
+            <url>https://github.com/xedin</url>
+        </developer>
+    </developers>
+    <contributors>
+        <contributor>
+            <name>Marko A. Rodriguez</name>
+            <email>marko@markorodriguez.com</email>
+            <url>https://markorodriguez.com</url>
+        </contributor>
+        <contributor>
+            <name>Stephen Mallette</name>
+            <email>spmva@genoprime.com</email>
+            <url>https://stephen.genoprime.com</url>
+        </contributor>
+    </contributors>
+    <inceptionYear>2012</inceptionYear>
+    <licenses>
+        <license>
+            <name>The Apache Software License, Version 2.0</name>
+            <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
+        </license>
+    </licenses>
+    <scm>
+        <connection>scm:git:git@github.com:JanusGraph/janusgraph.git</connection>
+        <developerConnection>scm:git:git@github.com:JanusGraph/janusgraph.git</developerConnection>
+        <url>git@github.com:JanusGraph/janusgraph.git</url>
+        <tag>v0.6.0</tag>
+    </scm>
+    <distributionManagement>
+        <snapshotRepository>
+            <id>ossrh</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+        </snapshotRepository>
+        <repository>
+            <id>ossrh</id>
+            <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+        </repository>
+    </distributionManagement>
+    <properties>
+        <titan.compatible-versions>1.0.0,1.1.0-SNAPSHOT</titan.compatible-versions>
+        <tinkerpop.version>3.5.1</tinkerpop.version>
+        <junit-platform.version>1.7.2</junit-platform.version>
+        <junit.version>5.7.2</junit.version>
+        <mockito.version>3.8.0</mockito.version>
+        <jamm.version>0.3.0</jamm.version>
+        <metrics.version>4.1.18</metrics.version>
+        <slf4j.version>1.7.30</slf4j.version>
+        <httpcomponents.httpclient.version>4.5.13</httpcomponents.httpclient.version>
+        <httpcomponents.httpcore.version>4.4.14</httpcomponents.httpcore.version>
+        <hadoop2.version>2.8.5</hadoop2.version>
+        <hbase1.version>1.6.0</hbase1.version>
+        <hbase2.version>2.2.7</hbase2.version>
+        <htrace.version>4.2.0-incubating</htrace.version>
+        <bigtable.version>1.21.0</bigtable.version>
+        <scylladb.version>1.7.1</scylladb.version>
+        <!-- align with org.apache.hbase:hbase -->
+        <jackson1.version>1.9.13</jackson1.version>
+        <!-- align with org.apache.spark:spark-core_2.12 -->
+        <jackson2.version>2.10.0</jackson2.version>
+        <lucene-solr.version>8.9.0</lucene-solr.version>
+        <elasticsearch.version>7.14.0</elasticsearch.version>
+        <commons.beanutils.version>1.9.4</commons.beanutils.version>
+        <commons.collections.version>3.2.2</commons.collections.version>
+        <zookeeper.version>3.6.2</zookeeper.version>
+        <!-- align with org.apache.tinkerpop:tinkerpop -->
+        <netty4.version>4.1.61.Final</netty4.version>
+        <jna.version>5.7.0</jna.version>
+        <gmavenplus.version>1.12.1</gmavenplus.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <janusgraph.testdir>${project.build.directory}/janusgraph-test</janusgraph.testdir>
+        <gpg.skip>false</gpg.skip>
+        <maven.gpg.version>1.6</maven.gpg.version>
+        <perf.jvm.opts />
+        <default.test.jvm.opts>-Xms256m -Xmx768m -XX:+HeapDumpOnOutOfMemoryError -ea ${test.extra.jvm.opts}</default.test.jvm.opts>
+        <mem.jvm.opts>-Xms256m -Xmx256m -ea -XX:+HeapDumpOnOutOfMemoryError ${test.extra.jvm.opts}</mem.jvm.opts>
+        <test.extra.jvm.opts />
+        <test.skip.default>false</test.skip.default>
+        <test.skip.tp>true</test.skip.tp>
+        <top.level.basedir>${basedir}</top.level.basedir>
+        <maven.javadoc.version>3.2.0</maven.javadoc.version>
+        <compiler.source>1.8</compiler.source>
+        <compiler.target>1.8</compiler.target>
+        <test.excluded.groups>MEMORY_TESTS,PERFORMANCE_TESTS,BRITTLE_TESTS</test.excluded.groups>
+        <dependency.locations.enabled>false</dependency.locations.enabled>
+        <cassandra.version>3.11.10</cassandra.version>
+        <cassandra-driver.version>4.13.0</cassandra-driver.version>
+        <scylladb.version>4.4.0</scylladb.version>
+        <testcontainers.version>1.16.0</testcontainers.version>
+        <easymock.version>4.2</easymock.version>
+        <protobuf.version>3.15.6</protobuf.version>
+        <grpc.version>1.38.1</grpc.version>
+        <protoc.version>3.15.3</protoc.version>
+        <jmh.version>1.21</jmh.version>
+    </properties>
+    <modules>
+        <module>janusgraph-grpc</module>
+        <module>janusgraph-driver</module>
+        <module>janusgraph-core</module>
+        <module>janusgraph-server</module>
+        <module>janusgraph-backend-testutils</module>
+        <module>janusgraph-test</module>
+        <module>janusgraph-inmemory</module>
+        <module>janusgraph-berkeleyje</module>
+        <module>janusgraph-cql</module>
+        <module>janusgraph-hadoop</module>
+        <module>janusgraph-hbase</module>
+        <module>janusgraph-bigtable</module>
+        <module>janusgraph-es</module>
+        <module>janusgraph-lucene</module>
+        <module>janusgraph-all</module>
+        <module>janusgraph-dist</module>
+        <module>janusgraph-doc</module>
+        <module>janusgraph-solr</module>
+        <module>janusgraph-examples</module>
+    </modules>
+    <repositories>
+        <repository>
+            <id>apache-snapshots</id>
+            <name>repository.apache.org snapshots</name>
+            <url>https://repository.apache.org/content/repositories/snapshots</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <enabled>true</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+    <build>
+        <directory>${basedir}/target</directory>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-enforcer-plugin</artifactId>
+                <version>3.0.0-M3</version>
+                <executions>
+                    <execution>
+                        <id>enforce-dependency-convergence</id>
+                        <goals>
+                            <goal>enforce</goal>
+                        </goals>
+                        <configuration>
+                            <rules>
+                                <requireUpperBoundDeps>
+                                    <excludes>
+                                        <exclude>com.google.guava:guava</exclude>
+                                        <exclude>com.fasterxml.jackson.core:jackson-annotations</exclude>
+                                        <exclude>com.fasterxml.jackson.core:jackson-databind</exclude>
+                                        <exclude>com.fasterxml.jackson.core:jackson-core</exclude>
+                                    </excludes>
+                                </requireUpperBoundDeps>
+                                <DependencyConvergence />
+                            </rules>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-release-plugin</artifactId>
+                <configuration>
+                    <!--
+                      Only release:perform uses this configuration
+                      setting; release:prepare doesn't care and always
+                      runs "clean verify"
+                    -->
+                    <goals>javadoc:aggregate deploy</goals>
+
+                    <!--
+                      Tell the release plugin to never "git push".
+                      When releasing, you have to manually issue "git
+                      push" between release:prepare and
+                      release:perform.  You'll have to push both the
+                      branch you're releasing and the tag
+                      release:prepare locally created.
+                    -->
+                    <pushChanges>false</pushChanges>
+
+                    <!--
+                      @{...} is a special variable interpolation
+                      syntax that uses the target release version
+                      instead of the pom's actual version, which is
+                      usually a -SNAPSHOT version when this setting
+                      gets evaluated.
+                    -->
+                    <tagNameFormat>@{project.version}</tagNameFormat>
+
+                    <!--
+                      The release:perform goal activates these
+                      profiles when it invokes maven with the <goals>
+                      listed above.  Release engineering specific to
+                      release:perform and disabled during non-release
+                      operation should be encapsulated with the
+                      profile id listed below.
+                    -->
+                    <releaseProfiles>janusgraph-release</releaseProfiles>
+                    <useReleaseProfile>false</useReleaseProfile>
+
+                    <!-- Keep all submodules at same version as parent -->
+                    <autoVersionSubmodules>true</autoVersionSubmodules>
+
+                    <!-- applies to both release:prepare and :perform -->
+                    <arguments>-DskipTests=true</arguments>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.rat</groupId>
+                <artifactId>apache-rat-plugin</artifactId>
+                <version>0.13</version>
+                <executions>
+                    <execution>
+                        <id>rat-checks</id>
+                        <phase>validate</phase>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <excludeSubProjects>false</excludeSubProjects>
+                    <excludes>
+                        <exclude>**/target/**</exclude>
+                        <exclude>**/.classpath</exclude>
+                        <exclude>**/.project</exclude>
+                        <exclude>**/.settings/**</exclude>
+                        <exclude>**/src/main/resources/META-INF/services/**</exclude>
+                        <exclude>**/src/test/resources/META-INF/services/**</exclude>
+                        <exclude>**/*.iml</exclude>
+                        <exclude>**/*.json</exclude>
+                        <exclude>**/*.xml</exclude>
+                        <exclude>**/*.xml.releaseBackup</exclude>
+                        <exclude>docs/**</exclude>
+                        <exclude>**/*.md</exclude>
+                        <exclude>**/*.txt</exclude>
+                        <exclude>**/*.log</exclude>
+                        <exclude>**/*.patch</exclude>
+                        <exclude>**/*.crt</exclude>
+                        <exclude>**/*.sysconfig</exclude>
+                        <exclude>**/*.csv</exclude>
+                        <exclude>**/*.id</exclude>
+                        <exclude>**/*.gz</exclude>
+                        <exclude>.editorconfig</exclude>
+                        <exclude>CC-BY-4.0.txt</exclude>
+                        <exclude>**/cqlshrc</exclude>
+                        <exclude>**/regionservers</exclude>
+                        <exclude>**/jaas_keytab.conf</exclude>
+                        <exclude>**/src/test/resources/excludes</exclude>
+                        <exclude>**/src/test/resources/longTests1</exclude>
+                        <exclude>**/src/test/resources/longTests2</exclude>
+                        <exclude>**/src/pkg/static/debian/**</exclude>
+                        <exclude>**/src/test/resources/mockito-extensions/**</exclude>
+                        <exclude>**/src/test/resources/org/janusgraph/hadoop/formats/edgelist/rdf/**</exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <version>3.1.2</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.puppycrawl.tools</groupId>
+                        <artifactId>checkstyle</artifactId>
+                        <version>8.42</version>
+                    </dependency>
+                </dependencies>
+                <configuration>
+                    <consoleOutput>true</consoleOutput>
+                    <failsOnError>true</failsOnError>
+                    <sourceDirectory>${project.build.sourceDirectories}</sourceDirectory>
+                    <includeTestSourceDirectory>true</includeTestSourceDirectory>
+                    <!-- define here because checkstyle and multi module is a PITA -->
+                    <checkstyleRules>
+                        <module name="Checker">
+                            <module name="NewlineAtEndOfFile" />
+                            <module name="UniqueProperties" />
+                            <module name="TreeWalker">
+                                <!-- <property name="tabWidth" value="4"/> -->
+                                <!-- Annotations: https://checkstyle.sourceforge.io/config_annotation.html -->
+                                <module name="MissingOverride" />
+                                <!-- Class Design: https://checkstyle.sourceforge.io/config_design.html -->
+                                <module name="OneTopLevelClass" />
+                                <!-- Coding: https://checkstyle.sourceforge.io/config_coding.html-->
+                                <module name="CovariantEquals" />
+                                <!-- <module name="EqualsHashCode" /> -->
+                                <!-- <module name="OneStatementPerLine" /> -->
+                                <module name="PackageDeclaration" />
+                                <module name="SimplifyBooleanExpression" />
+                                <module name="StringLiteralEquality" />
+                                <module name="UnnecessarySemicolonAfterOuterTypeDeclaration" />
+                                <module name="UnnecessarySemicolonAfterTypeMemberDeclaration" />
+                                <module name="UnnecessarySemicolonInEnumeration" />
+                                <module name="UnnecessarySemicolonInTryWithResources" />
+                                <!-- Imports: https://checkstyle.sourceforge.io/config_imports.html -->
+                                <module name="RedundantImport" />
+                                <module name="UnusedImports" />
+                                <module name="AvoidStarImport" />
+                                <module name="CustomImportOrder">
+                                    <property name="customImportOrderRules"
+                                    value="THIRD_PARTY_PACKAGE###STANDARD_JAVA_PACKAGE###STATIC"/>
+                                </module>
+                                <!-- Miscellaneous: https://checkstyle.sourceforge.io/config_misc.html -->
+                                <module name="ArrayTypeStyle" />
+                                <module name="OuterTypeFilename" />
+                                <module name="UpperEll" />
+                                <!-- Modifiers: https://checkstyle.sourceforge.io/config_modifier.html -->
+                                <module name="ModifierOrder" />
+                                <!-- <module name="RedundantModifier" /> -->
+                            </module>
+                        </module>
+                    </checkstyleRules>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>validate</id>
+                        <phase>validate</phase>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+
+        </plugins>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>3.8.1</version>
+                    <configuration>
+                        <source>${compiler.source}</source>
+                        <target>${compiler.target}</target>
+                        <compilerArguments>
+                            <Xmaxerrs>500</Xmaxerrs>
+                        </compilerArguments>
+                        <compilerArgs>
+                            <arg>-Xlint:unchecked</arg>
+                        </compilerArgs>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>2.22.2</version>
+                    <configuration>
+                        <argLine>${default.test.jvm.opts}</argLine>
+                        <runOrder>alphabetical</runOrder>
+                        <failIfNoTests>false</failIfNoTests>
+                        <!-- six hours -->
+                        <forkedProcessTimeoutInSeconds>21600</forkedProcessTimeoutInSeconds>
+                        <reuseForks>false</reuseForks>
+                        <excludes>
+                            <exclude>**/*PerformanceTest.java</exclude>
+                            <exclude>**/*ConcurrentTest.java</exclude>
+                            <exclude>**/*Groovy*Test.java</exclude>
+                            <exclude>**/*ComputerTest.java</exclude>
+                            <exclude>**/*ProcessTest.java</exclude>
+                            <exclude>**/*ProcessPerformanceTest.java</exclude>
+                            <exclude>**/*StructureTest.java</exclude>
+                        </excludes>
+                        <excludedGroups>${test.excluded.groups}</excludedGroups>
+                        <skip>${test.skip.default}</skip>
+                        <!-- Use log4j.properties from module test resources -->
+                        <systemProperties>
+                            <property>
+                                <name>log4j.configuration</name>
+                                <value>file:${project.build.directory}/test-classes/log4j.properties</value>
+                            </property>
+                        </systemProperties>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>tinkerpop-test</id>
+                            <goals>
+                                <goal>test</goal>
+                            </goals>
+                            <phase>test</phase>
+                            <configuration combine.self="override">
+                                <reuseForks>false</reuseForks>
+                                <forkCount>1</forkCount>
+                                <parallel>none</parallel>
+                                <threadCount>1</threadCount>
+                                <perCoreThreadCount>false</perCoreThreadCount>
+                                <includes>
+                                    <include>**/*Groovy*Test.java</include>
+                                    <include>**/*ComputerTest.java</include>
+                                    <include>**/*ProcessTest.java</include>
+                                    <include>**/*ProcessPerformanceTest.java</include>
+                                    <include>**/*StructureTest.java</include>
+                                </includes>
+                                <runOrder>alphabetical</runOrder>
+                                <skipTests>${test.skip.tp}</skipTests>
+                                <systemPropertyVariables>
+                                    <build.dir>${project.build.directory}</build.dir>
+                                    <log4j.configuration>file:${project.build.directory}/test-classes/log4j.properties</log4j.configuration>
+                                    <is.testing>true</is.testing>
+                                </systemPropertyVariables>
+                            </configuration>
+                        </execution>
+                    </executions>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-failsafe-plugin</artifactId>
+                    <version>2.22.2</version>
+                    <configuration>
+                        <!-- Use log4j.properties from module test resources -->
+                        <systemProperties>
+                            <property>
+                                <name>log4j.configuration</name>
+                                <value>file:${project.build.directory}/test-classes/log4j.properties</value>
+                            </property>
+                        </systemProperties>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-deploy-plugin</artifactId>
+                    <version>2.8.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-jar-plugin</artifactId>
+                    <version>3.2.0</version>
+                    <configuration>
+                        <archive>
+                            <manifestEntries>
+                                <janusgraphVersion>${project.version}</janusgraphVersion>
+                                <tinkerpopVersion>${tinkerpop.version}</tinkerpopVersion>
+                            </manifestEntries>
+                        </archive>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-resources-plugin</artifactId>
+                    <version>3.2.0</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-release-plugin</artifactId>
+                    <version>2.5.3</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-javadoc-plugin</artifactId>
+                    <version>${maven.javadoc.version}</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-assembly-plugin</artifactId>
+                    <version>3.3.0</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-source-plugin</artifactId>
+                    <version>3.2.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-clean-plugin</artifactId>
+                    <version>3.1.0</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-dependency-plugin</artifactId>
+                    <version>3.1.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-gpg-plugin</artifactId>
+                    <version>${maven.gpg.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>build-helper-maven-plugin</artifactId>
+                    <version>3.2.0</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>exec-maven-plugin</artifactId>
+                    <version>3.0.0</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>cobertura-maven-plugin</artifactId>
+                    <version>2.7</version>
+                    <configuration>
+                        <aggregate>true</aggregate>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-antrun-plugin</artifactId>
+                    <version>3.0.0</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.jacoco</groupId>
+                    <artifactId>jacoco-maven-plugin</artifactId>
+                    <version>0.8.6</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+    <dependencyManagement>
+        <dependencies>
+            <!-- Tinkerpop 3.x -->
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>gremlin-core</artifactId>
+                <version>${tinkerpop.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>gremlin-server</artifactId>
+                <version>${tinkerpop.version}</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>com.codahale.metrics</groupId>
+                        <artifactId>metrics-core</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>gremlin-console</artifactId>
+                <version>${tinkerpop.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>gremlin-groovy</artifactId>
+                <version>${tinkerpop.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>gremlin-driver</artifactId>
+                <version>${tinkerpop.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>gremlin-test</artifactId>
+                <version>${tinkerpop.version}</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>junit</groupId>
+                        <artifactId>junit</artifactId>
+                    </exclusion>
+                    <exclusion>
+                        <groupId>org.ow2.asm</groupId>
+                        <artifactId>asm</artifactId>
+                    </exclusion>
+                    <exclusion>
+                        <groupId>org.apache.kerby</groupId>
+                        <artifactId>kerb-simplekdc</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>tinkergraph-gremlin</artifactId>
+                <version>${tinkerpop.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>hadoop-gremlin</artifactId>
+                <version>${tinkerpop.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tinkerpop</groupId>
+                <artifactId>spark-gremlin</artifactId>
+                <version>${tinkerpop.version}</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>org.eclipse.jetty.orbit</groupId>
+                        <artifactId>javax.servlet</artifactId>
+                    </exclusion>
+                    <exclusion>
+                        <groupId>com.thoughtworks.paranamer</groupId>
+                        <artifactId>paranamer</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-configuration2</artifactId>
+                <!-- align with TinkerPop -->
+                <version>2.7</version>
+            </dependency>
+
+            <!-- Jackson 2.x -->
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-core</artifactId>
+                <version>${jackson2.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-databind</artifactId>
+                <version>${jackson2.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.fasterxml.jackson.datatype</groupId>
+                <artifactId>jackson-datatype-json-org</artifactId>
+                <version>${jackson2.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-annotations</artifactId>
+                <version>${jackson2.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.fasterxml.jackson.module</groupId>
+                <artifactId>jackson-module-scala_2.12</artifactId>
+                <version>${jackson2.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.fasterxml.jackson.module</groupId>
+                <artifactId>jackson-module-paranamer</artifactId>
+                <version>${jackson2.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.google.code.findbugs</groupId>
+                <artifactId>jsr305</artifactId>
+                <version>3.0.2</version>
+            </dependency>
+            <dependency>
+                <groupId>javax.validation</groupId>
+                <artifactId>validation-api</artifactId>
+                <version>2.0.1.Final</version>
+            </dependency>
+
+            <!-- Jackson 1.x -->
+            <dependency>
+                <groupId>org.codehaus.jackson</groupId>
+                <artifactId>jackson-mapper-asl</artifactId>
+                <version>${jackson1.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.codehaus.jackson</groupId>
+                <artifactId>jackson-core-asl</artifactId>
+                <version>${jackson1.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.codehaus.jackson</groupId>
+                <artifactId>jackson-xc</artifactId>
+                <version>${jackson1.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.codehaus.jackson</groupId>
+                <artifactId>jackson-jaxrs</artifactId>
+                <version>${jackson1.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-lang3</artifactId>
+                <version>3.11</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-configuration</groupId>
+                <artifactId>commons-configuration</artifactId>
+                <version>1.10</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-collections</groupId>
+                <artifactId>commons-collections</artifactId>
+                <version>${commons.collections.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-net</groupId>
+                <artifactId>commons-net</artifactId>
+                <version>3.7.2</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-beanutils</groupId>
+                <artifactId>commons-beanutils</artifactId>
+                <version>${commons.beanutils.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-beanutils</groupId>
+                <artifactId>commons-beanutils-core</artifactId>
+                <version>${commons.beanutils.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-logging</groupId>
+                <artifactId>commons-logging</artifactId>
+                <version>1.2</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-math</artifactId>
+                <version>2.2</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-math3</artifactId>
+                <version>3.6.1</version>
+            </dependency>
+            <dependency>
+                <groupId>org.yaml</groupId>
+                <artifactId>snakeyaml</artifactId>
+                <version>1.28</version>
+            </dependency>
+            <dependency>
+                <groupId>net.oneandone.reflections8</groupId>
+                <artifactId>reflections8</artifactId>
+                <version>0.11.7</version>
+            </dependency>
+            <dependency>
+                <groupId>xml-apis</groupId>
+                <artifactId>xml-apis</artifactId>
+                <version>2.0.2</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.zookeeper</groupId>
+                <artifactId>zookeeper</artifactId>
+                <version>${zookeeper.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.avro</groupId>
+                <artifactId>avro</artifactId>
+                <version>1.10.1</version>
+            </dependency>
+            <dependency>
+                <artifactId>jboss-logging</artifactId>
+                <groupId>org.jboss.logging</groupId>
+                <version>3.4.1.Final</version>
+            </dependency>
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-api</artifactId>
+                <version>${slf4j.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-log4j12</artifactId>
+                <version>${slf4j.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>log4j</groupId>
+                <artifactId>log4j</artifactId>
+                <version>1.2.17</version>
+            </dependency>
+            <dependency>
+                <groupId>ch.qos.logback</groupId>
+                <artifactId>logback-classic</artifactId>
+                <version>1.1.3</version>
+            </dependency>
+            <dependency>
+                <!-- align with org.apache.hbase:hbase -->
+                <groupId>org.mortbay.jetty</groupId>
+                <artifactId>jetty</artifactId>
+                <version>6.1.26</version>
+            </dependency>
+
+            <dependency>
+                <groupId>net.jpountz.lz4</groupId>
+                <artifactId>lz4</artifactId>
+                <version>1.3.0</version>
+            </dependency>
+
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-all</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-handler</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-common</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-resolver</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-codec</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-transport</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-buffer</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-transport-native-epoll</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-transport-native-unix-common</artifactId>
+                <version>${netty4.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.objenesis</groupId>
+                <artifactId>objenesis</artifactId>
+                <version>3.2</version>
+            </dependency>
+
+            <dependency>
+                <groupId>org.junit.platform</groupId>
+                <artifactId>junit-platform-launcher</artifactId>
+                <version>${junit-platform.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.junit.platform</groupId>
+                <artifactId>junit-platform-runner</artifactId>
+                <version>${junit-platform.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.junit.jupiter</groupId>
+                <artifactId>junit-jupiter-api</artifactId>
+                <version>${junit.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.junit.jupiter</groupId>
+                <artifactId>junit-jupiter-params</artifactId>
+                <version>${junit.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.junit.jupiter</groupId>
+                <artifactId>junit-jupiter-engine</artifactId>
+                <version>${junit.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.junit.vintage</groupId>
+                <artifactId>junit-vintage-engine</artifactId>
+                <version>${junit.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-core</artifactId>
+                <version>${mockito.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-inline</artifactId>
+                <version>${mockito.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-junit-jupiter</artifactId>
+                <version>${mockito.version}</version>
+            </dependency>
+            <dependency>
+                <!-- Run the full test suite when changing the Guava version.
+                     The Guava team is deadly serious about their 18 month period from deprecation
+                     to feature deletion, and as a result, at least one of JanusGraph's dependencies is
+                     likely to break whenever the Guava version changes.
+
+                     Example where blithely upgrading Guava introduced a linkage error in the past:
+                     https://issues.apache.org/jira/browse/HBASE-10174
+                -->
+                <groupId>com.google.guava</groupId>
+                <artifactId>guava</artifactId>
+                <version>29.0-jre</version>
+            </dependency>
+            <dependency>
+                <groupId>com.google.errorprone</groupId>
+                <artifactId>error_prone_annotations</artifactId>
+                <version>2.7.1</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-codec</groupId>
+                <artifactId>commons-codec</artifactId>
+                <version>1.15</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-cli</groupId>
+                <artifactId>commons-cli</artifactId>
+                <version>1.4</version>
+            </dependency>
+            <dependency>
+                <groupId>org.jboss.netty</groupId>
+                <artifactId>netty</artifactId>
+                <version>3.2.10.Final</version>
+            </dependency>
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty</artifactId>
+                <version>3.10.6.Final</version>
+            </dependency>
+
+            <!-- Spatial4j -->
+            <dependency>
+                <groupId>org.locationtech.spatial4j</groupId>
+                <artifactId>spatial4j</artifactId>
+                <version>0.8</version>
+            </dependency>
+
+            <!-- Java Topology Suite (JTS) -->
+            <dependency>
+                <groupId>org.locationtech.jts</groupId>
+                <artifactId>jts-core</artifactId>
+                <version>1.17.0</version>
+            </dependency>
+
+            <!-- Package prefix is org.apache.commons.httpclient -->
+            <dependency>
+                <groupId>commons-httpclient</groupId>
+                <artifactId>commons-httpclient</artifactId>
+                <version>3.1</version>
+            </dependency>
+
+            <!-- Package prefix is org.apache.http -->
+            <dependency>
+                <groupId>org.apache.httpcomponents</groupId>
+                <artifactId>httpclient</artifactId>
+                <version>${httpcomponents.httpclient.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.httpcomponents</groupId>
+                <artifactId>httpcore</artifactId>
+                <version>${httpcomponents.httpcore.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.httpcomponents</groupId>
+                <artifactId>httpcore-nio</artifactId>
+                <version>${httpcomponents.httpcore.version}</version>
+            </dependency>
+
+            <dependency>
+                <groupId>com.googlecode.json-simple</groupId>
+                <artifactId>json-simple</artifactId>
+                <version>1.1.1</version>
+            </dependency>
+
+            <dependency>
+                <groupId>commons-io</groupId>
+                <artifactId>commons-io</artifactId>
+                <version>2.8.0</version>
+            </dependency>
+            <dependency>
+                <groupId>org.jacoco</groupId>
+                <artifactId>org.jacoco.ant</artifactId>
+                <version>0.8.6</version>
+            </dependency>
+            <dependency>
+                <groupId>io.dropwizard.metrics</groupId>
+                <artifactId>metrics-core</artifactId>
+                <version>${metrics.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.dropwizard.metrics</groupId>
+                <artifactId>metrics-jvm</artifactId>
+                <version>${metrics.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.dropwizard.metrics</groupId>
+                <artifactId>metrics-graphite</artifactId>
+                <version>${metrics.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.dropwizard.metrics</groupId>
+                <artifactId>metrics-jmx</artifactId>
+                <version>${metrics.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.boundary</groupId>
+                <artifactId>high-scale-lib</artifactId>
+                <version>1.0.6</version>
+            </dependency>
+            <dependency>
+                <groupId>com.clearspring.analytics</groupId>
+                <artifactId>stream</artifactId>
+                <version>2.9.8</version>
+            </dependency>
+            <dependency>
+                <groupId>it.unimi.dsi</groupId>
+                <artifactId>fastutil</artifactId>
+                <version>8.5.2</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.cassandra</groupId>
+                <artifactId>cassandra-all</artifactId>
+                <version>${cassandra.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.javassist</groupId>
+                <artifactId>javassist</artifactId>
+                <version>3.27.0-GA</version>
+            </dependency>
+            <dependency>
+                <groupId>com.carrotsearch</groupId>
+                <artifactId>junit-benchmarks</artifactId>
+                <version>0.7.2</version>
+            </dependency>
+            <dependency>
+                <groupId>com.carrotsearch</groupId>
+                <artifactId>hppc</artifactId>
+                <version>0.8.2</version>
+            </dependency>
+            <dependency>
+                <groupId>com.carrotsearch.randomizedtesting</groupId>
+                <artifactId>randomizedtesting-runner</artifactId>
+                <version>2.7.8</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>junit</groupId>
+                        <artifactId>junit</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-compress</artifactId>
+                <version>1.21</version>
+            </dependency>
+            <dependency>
+                <groupId>com.google.protobuf</groupId>
+                <artifactId>protobuf-java</artifactId>
+                <version>${protobuf.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.google.protobuf</groupId>
+                <artifactId>protobuf-java-util</artifactId>
+                <version>${protobuf.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.grpc</groupId>
+                <artifactId>grpc-core</artifactId>
+                <version>${grpc.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.grpc</groupId>
+                <artifactId>grpc-protobuf</artifactId>
+                <version>${grpc.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.grpc</groupId>
+                <artifactId>grpc-stub</artifactId>
+                <version>${grpc.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.grpc</groupId>
+                <artifactId>grpc-testing</artifactId>
+                <version>${grpc.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.grpc</groupId>
+                <artifactId>grpc-netty-shaded</artifactId>
+                <version>${grpc.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.velocity</groupId>
+                <artifactId>velocity</artifactId>
+                <version>1.7</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>commons-lang</groupId>
+                        <artifactId>commons-lang</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.ant</groupId>
+                <artifactId>ant</artifactId>
+                <version>1.10.11</version>
+            </dependency>
+            <dependency>
+                <groupId>javax.servlet</groupId>
+                <artifactId>servlet-api</artifactId>
+                <version>2.5</version>
+            </dependency>
+            <dependency>
+                <groupId>org.elasticsearch.client</groupId>
+                <artifactId>elasticsearch-rest-client</artifactId>
+                <version>${elasticsearch.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.testcontainers</groupId>
+                <artifactId>testcontainers</artifactId>
+                <version>${testcontainers.version}</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>net.java.dev.jna</groupId>
+                        <artifactId>jna</artifactId>
+                    </exclusion>
+                    <exclusion>
+                        <groupId>junit</groupId>
+                        <artifactId>junit</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+            <dependency>
+                <groupId>org.testcontainers</groupId>
+                <artifactId>elasticsearch</artifactId>
+                <version>${testcontainers.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.testcontainers</groupId>
+                <artifactId>cassandra</artifactId>
+                <version>${testcontainers.version}</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>com.datastax.cassandra</groupId>
+                        <artifactId>cassandra-driver-core</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+            <dependency>
+                <groupId>org.testcontainers</groupId>
+                <artifactId>solr</artifactId>
+                <version>${testcontainers.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.testcontainers</groupId>
+                <artifactId>junit-jupiter</artifactId>
+                <version>${testcontainers.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.easymock</groupId>
+                <artifactId>easymock</artifactId>
+                <version>${easymock.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.github.artsok</groupId>
+                <artifactId>rerunner-jupiter</artifactId>
+                <version>2.1.6</version>
+            </dependency>
+            <dependency>
+                <groupId>org.xerial.snappy</groupId>
+                <artifactId>snappy-java</artifactId>
+                <version>1.1.7.6</version>
+            </dependency>
+            <dependency>
+                <groupId>javax.activation</groupId>
+                <artifactId>activation</artifactId>
+                <version>1.1.1</version>
+            </dependency>
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>jcl-over-slf4j</artifactId>
+                <version>1.7.30</version>
+            </dependency>
+            <dependency>
+                <groupId>com.nimbusds</groupId>
+                <artifactId>nimbus-jose-jwt</artifactId>
+                <version>8.2.1</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-text</artifactId>
+                <version>1.9</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <!-- Logging -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-log4j12</artifactId>
+            <scope>runtime</scope>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <scope>runtime</scope>
+            <optional>true</optional>
+        </dependency>
+    </dependencies>
+
+    <profiles>
+        <profile>
+            <id>java-11</id>
+            <properties>
+                <compiler.source>11</compiler.source>
+                <compiler.target>11</compiler.target>
+            </properties>
+        </profile>
+
+        <profile>
+            <id>janusgraph-release</id>
+            <!--
+              Sign artifacts artifacts only during release:perform
+              when this profile is automatically activated or whenever
+              else it is manually activated.
+
+              Stolen from: https://blog.sonatype.com/people/2010/01/how-to-generate-pgp-signatures-with-maven/
+            -->
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-source-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>attach-sources</id>
+                                <phase>package</phase>
+                                <goals>
+                                    <goal>jar-no-fork</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <artifactId>maven-javadoc-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>attach-javadocs</id>
+                                <phase>package</phase>
+                                <goals>
+                                    <goal>jar</goal>
+                                </goals>
+                                <configuration>
+                                    <!-- Quiet mode still shows warnings and errors -->
+                                    <quiet>true</quiet>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <artifactId>maven-gpg-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>sign-artifacts</id>
+                                <phase>package</phase>
+                                <goals>
+                                    <goal>sign</goal>
+                                </goals>
+                                <configuration>
+                                    <useAgent>true</useAgent>
+                                    <skip>${gpg.skip}</skip>
+                                    <excludes>
+                                        <exclude>*.asc</exclude>
+                                    </excludes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+
+        <profile>
+            <id>hadoop2</id>
+
+            <activation>
+                <property>
+                    <name>!hadoop.profile</name>
+                </property>
+            </activation>
+
+            <dependencyManagement>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-annotations</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-auth</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-client</artifactId>
+                        <version>${hadoop2.version}</version>
+                        <exclusions>
+                            <exclusion>
+                                <groupId>javax.servlet</groupId>
+                                <artifactId>servlet-api</artifactId>
+                            </exclusion>
+                            <exclusion>
+                                <groupId>org.apache.commons</groupId>
+                                <artifactId>commons-compress</artifactId>
+                            </exclusion>
+                        </exclusions>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-common</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-hdfs</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-hdfs</artifactId>
+                        <version>${hadoop2.version}</version>
+                        <classifier>tests</classifier>
+                        <type>test-jar</type>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-mapreduce-client-common</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-mapreduce-client-core</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-mapreduce-client-jobclient</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-mapreduce-client-jobclient</artifactId>
+                        <version>${hadoop2.version}</version>
+                        <classifier>tests</classifier>
+                        <type>test-jar</type>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-mapreduce-client-shuffle</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-yarn-api</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-yarn-common</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.apache.hadoop</groupId>
+                        <artifactId>hadoop-yarn-server-common</artifactId>
+                        <version>${hadoop2.version}</version>
+                    </dependency>
+                </dependencies>
+            </dependencyManagement>
+        </profile>
+
+        <profile>
+            <id>coverage</id>
+            <properties>
+                <test.extra.jvm.opts>${jacoco.opts}</test.extra.jvm.opts>
+            </properties>
+            <build>
+                <plugins>
+                    <plugin>
+                        <artifactId>maven-resources-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>copy-sources-for-jacoco</id>
+                                <phase>process-resources</phase>
+                                <goals>
+                                    <goal>copy-resources</goal>
+                                </goals>
+                                <configuration>
+                                    <outputDirectory>${project.build.directory}/jacoco-sources</outputDirectory>
+                                    <resources>
+                                        <resource>
+                                            <directory>${project.basedir}/src/main/java/</directory>
+                                            <filtering>false</filtering>
+                                        </resource>
+                                    </resources>
+                                </configuration>
+                            </execution>
+                            <execution>
+                                <id>copy-classes-for-jacoco</id>
+                                <phase>process-classes</phase>
+                                <goals>
+                                    <goal>copy-resources</goal>
+                                </goals>
+                                <configuration>
+                                    <outputDirectory>${project.build.directory}/jacoco-classes</outputDirectory>
+                                    <resources>
+                                        <resource>
+                                            <directory>${project.build.directory}/classes/</directory>
+                                            <filtering>false</filtering>
+                                        </resource>
+                                    </resources>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <artifactId>maven-dependency-plugin</artifactId>
+                        <executions>
+                            <!-- Unpack all dependency class and source files for use by JaCoCo -->
+                            <execution>
+                                <id>unpack-dependency-sources</id>
+                                <phase>generate-resources</phase>
+                                <goals>
+                                    <goal>unpack-dependencies</goal>
+                                </goals>
+                                <configuration>
+                                    <classifier>sources</classifier>
+                                    <outputDirectory>${project.build.directory}/jacoco-sources</outputDirectory>
+                                    <includeGroupIds>${project.groupId}</includeGroupIds>
+                                    <excludeArtifactIds>janusgraph-test</excludeArtifactIds>
+                                </configuration>
+                            </execution>
+                            <execution>
+                                <id>unpack-dependency-classes</id>
+                                <phase>generate-resources</phase>
+                                <goals>
+                                    <goal>unpack-dependencies</goal>
+                                </goals>
+                                <configuration>
+                                    <classifier />
+                                    <!-- empty classifier requests the artifact containing classes -->
+                                    <outputDirectory>${project.build.directory}/jacoco-classes</outputDirectory>
+                                    <includeGroupIds>${project.groupId}</includeGroupIds>
+                                    <excludeArtifactIds>janusgraph-test</excludeArtifactIds>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.jacoco</groupId>
+                        <artifactId>jacoco-maven-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>prepare-jacoco-agent</id>
+                                <phase>test-compile</phase>
+                                <goals>
+                                    <goal>prepare-agent</goal>
+                                </goals>
+                                <configuration>
+                                    <destFile>${top.level.basedir}/target/jacoco-combined.exec</destFile>
+                                    <append>true</append>
+                                    <propertyName>jacoco.opts</propertyName>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <!-- The Maven JaCoCo plugin doesn't allow
+                             configuration of sourcefiles and destfiles
+                             directories.  The Ant JaCoCo task does.  That's
+                             why we use antrun here for JaCoCo instead of
+                             JaCoCo's Maven plugin. -->
+                        <artifactId>maven-antrun-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>default-cli</id>
+                                <phase>post-integration-test</phase>
+                                <goals>
+                                    <goal>run</goal>
+                                </goals>
+                                <configuration>
+                                    <target>
+                                        <taskdef name="report" classname="org.jacoco.ant.ReportTask" classpathref="maven.plugin.classpath" />
+                                        <report>
+                                            <executiondata>
+                                                <file file="${top.level.basedir}/target/jacoco-combined.exec" />
+                                            </executiondata>
+                                            <structure name="Integration test coverage">
+                                                <classfiles>
+                                                    <fileset dir="${project.build.directory}/jacoco-classes" />
+                                                </classfiles>
+                                                <sourcefiles encoding="UTF-8">
+                                                    <fileset dir="${project.build.directory}/jacoco-sources" />
+                                                </sourcefiles>
+                                            </structure>
+                                            <html destdir="${project.build.directory}/jacoco-report" />
+                                            <xml destfile="${project.build.directory}/jacoco-report/report.xml" />
+                                        </report>
+                                    </target>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <dependencies>
+                            <dependency>
+                                <groupId>org.jacoco</groupId>
+                                <artifactId>org.jacoco.ant</artifactId>
+                                <version>0.8.6</version>
+                            </dependency>
+                        </dependencies>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+
+        <profile>
+            <id>memory-test</id>
+            <activation>
+                <property>
+                    <name>test.skip.mem</name>
+                    <value>false</value>
+                </property>
+            </activation>
+            <build>
+                <plugins>
+                    <plugin>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>memory-test</id>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <phase>test</phase>
+                                <configuration combine.self="override">
+                                    <argLine>${mem.jvm.opts}</argLine>
+                                    <reuseForks>false</reuseForks>
+                                    <forkCount>1</forkCount>
+                                    <parallel>none</parallel>
+                                    <threadCount>1</threadCount>
+                                    <perCoreThreadCount>false</perCoreThreadCount>
+                                    <runOrder>alphabetical</runOrder>
+                                    <groups>MEMORY_TESTS</groups>
+                                    <excludedGroups />
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+
+        <profile>
+            <id>performance-test</id>
+            <activation>
+                <property>
+                    <name>test.skip.perf</name>
+                    <value>false</value>
+                </property>
+            </activation>
+            <build>
+                <plugins>
+                    <plugin>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>performance-test</id>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <phase>test</phase>
+                                <configuration combine.self="override">
+                                    <argLine>${default.test.jvm.opts} ${perf.jvm.opts}</argLine>
+                                    <reuseForks>false</reuseForks>
+                                    <forkCount>1</forkCount>
+                                    <parallel>none</parallel>
+                                    <threadCount>1</threadCount>
+                                    <perCoreThreadCount>false</perCoreThreadCount>
+                                    <runOrder>alphabetical</runOrder>
+                                    <groups>PERFORMANCE_TESTS</groups>
+                                    <excludedGroups />
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+</project>