[Backport 2.x] Replaced "master" terminology in Log message

modules/transport-netty4/src/internalClusterTest/java/org/opensearch/rest/discovery/Zen2RestApiIT.java

@@ -176,7 +176,7 @@ public void testFailsOnUnknownNode() throws Exception {
             assertThat(e.getResponse().getStatusLine().getStatusCode(), is(400));
             assertThat(
                 e.getMessage(),
-                Matchers.containsString("add voting config exclusions request for [invalid] matched no master-eligible nodes")
+                Matchers.containsString("add voting config exclusions request for [invalid] matched no cluster-manager-eligible nodes")
             );
         }
     }

server/src/internalClusterTest/java/org/opensearch/cluster/coordination/UnsafeBootstrapAndDetachCommandIT.java

@@ -287,7 +287,7 @@ public void test3MasterNodes2Failed() throws Exception {
         internalCluster().setBootstrapMasterNodeIndex(2);
         List<String> masterNodes = new ArrayList<>();
 
-        logger.info("--> start 1st master-eligible node");
+        logger.info("--> start 1st cluster-manager-eligible node");
         masterNodes.add(
             internalCluster().startMasterOnlyNode(
                 Settings.builder().put(DiscoverySettings.INITIAL_STATE_TIMEOUT_SETTING.getKey(), "0s").build()
@@ -299,7 +299,7 @@ public void test3MasterNodes2Failed() throws Exception {
             Settings.builder().put(DiscoverySettings.INITIAL_STATE_TIMEOUT_SETTING.getKey(), "0s").build()
         ); // node ordinal 1
 
-        logger.info("--> start 2nd and 3rd master-eligible nodes and bootstrap");
+        logger.info("--> start 2nd and 3rd cluster-manager-eligible nodes and bootstrap");
         masterNodes.addAll(internalCluster().startMasterOnlyNodes(2)); // node ordinals 2 and 3
 
         logger.info("--> wait for all nodes to join the cluster");
@@ -335,19 +335,19 @@ public void test3MasterNodes2Failed() throws Exception {
             assertTrue(state.blocks().hasGlobalBlockWithId(NoMasterBlockService.NO_MASTER_BLOCK_ID));
         });
 
-        logger.info("--> try to unsafely bootstrap 1st master-eligible node, while node lock is held");
+        logger.info("--> try to unsafely bootstrap 1st cluster-manager-eligible node, while node lock is held");
         Environment environmentMaster1 = TestEnvironment.newEnvironment(
             Settings.builder().put(internalCluster().getDefaultSettings()).put(master1DataPathSettings).build()
         );
         expectThrows(() -> unsafeBootstrap(environmentMaster1), UnsafeBootstrapMasterCommand.FAILED_TO_OBTAIN_NODE_LOCK_MSG);
 
-        logger.info("--> stop 1st master-eligible node and data-only node");
+        logger.info("--> stop 1st cluster-manager-eligible node and data-only node");
         NodeEnvironment nodeEnvironment = internalCluster().getMasterNodeInstance(NodeEnvironment.class);
         internalCluster().stopRandomNode(InternalTestCluster.nameFilter(masterNodes.get(0)));
         assertBusy(() -> internalCluster().getInstance(GatewayMetaState.class, dataNode).allPendingAsyncStatesWritten());
         internalCluster().stopRandomDataNode();
 
-        logger.info("--> unsafely-bootstrap 1st master-eligible node");
+        logger.info("--> unsafely-bootstrap 1st cluster-manager-eligible node");
         MockTerminal terminal = unsafeBootstrap(environmentMaster1, false, true);
         Metadata metadata = OpenSearchNodeCommand.createPersistedClusterStateService(Settings.EMPTY, nodeEnvironment.nodeDataPaths())
             .loadBestOnDiskState().metadata;
@@ -363,7 +363,7 @@ public void test3MasterNodes2Failed() throws Exception {
             )
         );
 
-        logger.info("--> start 1st master-eligible node");
+        logger.info("--> start 1st cluster-manager-eligible node");
         String masterNode2 = internalCluster().startMasterOnlyNode(master1DataPathSettings);
 
         logger.info("--> detach-cluster on data-only node");
@@ -399,7 +399,7 @@ public void test3MasterNodes2Failed() throws Exception {
         IndexMetadata indexMetadata = clusterService().state().metadata().index("test");
         assertThat(indexMetadata.getSettings().get(IndexMetadata.SETTING_HISTORY_UUID), notNullValue());
 
-        logger.info("--> detach-cluster on 2nd and 3rd master-eligible nodes");
+        logger.info("--> detach-cluster on 2nd and 3rd cluster-manager-eligible nodes");
         Environment environmentMaster2 = TestEnvironment.newEnvironment(
             Settings.builder().put(internalCluster().getDefaultSettings()).put(master2DataPathSettings).build()
         );
@@ -409,7 +409,7 @@ public void test3MasterNodes2Failed() throws Exception {
         );
         detachCluster(environmentMaster3, false);
 
-        logger.info("--> start 2nd and 3rd master-eligible nodes and ensure 4 nodes stable cluster");
+        logger.info("--> start 2nd and 3rd cluster-manager-eligible nodes and ensure 4 nodes stable cluster");
         bootstrappedNodes.add(internalCluster().startMasterOnlyNode(master2DataPathSettings));
         bootstrappedNodes.add(internalCluster().startMasterOnlyNode(master3DataPathSettings));
         ensureStableCluster(4);
@@ -422,7 +422,7 @@ public void testAllMasterEligibleNodesFailedDanglingIndexImport() throws Excepti
 
         Settings settings = Settings.builder().put(AUTO_IMPORT_DANGLING_INDICES_SETTING.getKey(), true).build();
 
-        logger.info("--> start mixed data and master-eligible node and bootstrap cluster");
+        logger.info("--> start mixed data and cluster-manager-eligible node and bootstrap cluster");
         String masterNode = internalCluster().startNode(settings); // node ordinal 0
 
         logger.info("--> start data-only node and ensure 2 nodes stable cluster");
@@ -457,7 +457,7 @@ public void testAllMasterEligibleNodesFailedDanglingIndexImport() throws Excepti
         );
         detachCluster(environment, false);
 
-        logger.info("--> stop master-eligible node, clear its data and start it again - new cluster should form");
+        logger.info("--> stop cluster-manager-eligible node, clear its data and start it again - new cluster should form");
         internalCluster().restartNode(masterNode, new InternalTestCluster.RestartCallback() {
             @Override
             public boolean clearData(String nodeName) {

server/src/internalClusterTest/java/org/opensearch/snapshots/DedicatedClusterSnapshotRestoreIT.java

@@ -482,8 +482,8 @@ public void testSnapshotWithStuckNode() throws Exception {
         try {
             assertAcked(deleteSnapshotResponseFuture.actionGet());
         } catch (SnapshotMissingException ex) {
-            // When master node is closed during this test, it sometime manages to delete the snapshot files before
-            // completely stopping. In this case the retried delete snapshot operation on the new master can fail
+            // When cluster-manager node is closed during this test, it sometime manages to delete the snapshot files before
+            // completely stopping. In this case the retried delete snapshot operation on the new cluster-manager can fail
             // with SnapshotMissingException
         }
 
@@ -759,7 +759,7 @@ public void testRegistrationFailure() {
         logger.info("--> start first node");
         internalCluster().startNode();
         logger.info("--> start second node");
-        // Make sure the first node is elected as master
+        // Make sure the first node is elected as cluster-manager
         internalCluster().startNode(nonMasterNode());
         // Register mock repositories
         for (int i = 0; i < 5; i++) {
@@ -836,7 +836,7 @@ public void sendResponse(RestResponse response) {
     }
 
     public void testMasterShutdownDuringSnapshot() throws Exception {
-        logger.info("-->  starting two master nodes and two data nodes");
+        logger.info("-->  starting two cluster-manager nodes and two data nodes");
         internalCluster().startMasterOnlyNodes(2);
         internalCluster().startDataOnlyNodes(2);
 
@@ -859,7 +859,7 @@ public void testMasterShutdownDuringSnapshot() throws Exception {
             .setIndices("test-idx")
             .get();
 
-        logger.info("--> stopping master node");
+        logger.info("--> stopping cluster-manager node");
         internalCluster().stopCurrentMasterNode();
 
         logger.info("--> wait until the snapshot is done");
@@ -874,7 +874,7 @@ public void testMasterShutdownDuringSnapshot() throws Exception {
     }
 
     public void testMasterAndDataShutdownDuringSnapshot() throws Exception {
-        logger.info("-->  starting three master nodes and two data nodes");
+        logger.info("-->  starting three cluster-manager nodes and two data nodes");
         internalCluster().startMasterOnlyNodes(3);
         internalCluster().startDataOnlyNodes(2);
 
@@ -902,7 +902,7 @@ public void testMasterAndDataShutdownDuringSnapshot() throws Exception {
 
         logger.info("--> stopping data node {}", dataNode);
         stopNode(dataNode);
-        logger.info("--> stopping master node {} ", masterNode);
+        logger.info("--> stopping cluster-manager node {} ", masterNode);
         internalCluster().stopCurrentMasterNode();
 
         logger.info("--> wait until the snapshot is done");
@@ -925,7 +925,7 @@ public void testMasterAndDataShutdownDuringSnapshot() throws Exception {
      * the cluster.
      */
     public void testRestoreShrinkIndex() throws Exception {
-        logger.info("-->  starting a master node and a data node");
+        logger.info("-->  starting a cluster-manager node and a data node");
         internalCluster().startMasterOnlyNode();
         internalCluster().startDataOnlyNode();
 
@@ -1144,7 +1144,7 @@ public void testDeduplicateIndexMetadata() throws Exception {
     }
 
     public void testDataNodeRestartWithBusyMasterDuringSnapshot() throws Exception {
-        logger.info("-->  starting a master node and two data nodes");
+        logger.info("-->  starting a cluster-manager node and two data nodes");
         internalCluster().startMasterOnlyNode();
         internalCluster().startDataOnlyNodes(2);
         final Path repoPath = randomRepoPath();
@@ -1200,7 +1200,7 @@ public void testDataNodeRestartWithBusyMasterDuringSnapshot() throws Exception {
     }
 
     public void testDataNodeRestartAfterShardSnapshotFailure() throws Exception {
-        logger.info("-->  starting a master node and two data nodes");
+        logger.info("-->  starting a cluster-manager node and two data nodes");
         internalCluster().startMasterOnlyNode();
         final List<String> dataNodes = internalCluster().startDataOnlyNodes(2);
         final Path repoPath = randomRepoPath();

server/src/main/java/org/opensearch/action/admin/cluster/configuration/AddVotingConfigExclusionsRequest.java

@@ -54,7 +54,7 @@
 import java.util.stream.StreamSupport;
 
 /**
- * A request to add voting config exclusions for certain master-eligible nodes, and wait for these nodes to be removed from the voting
+ * A request to add voting config exclusions for certain cluster-manager-eligible nodes, and wait for these nodes to be removed from the voting
  * configuration.
  */
 public class AddVotingConfigExclusionsRequest extends MasterNodeRequest<AddVotingConfigExclusionsRequest> {
@@ -66,7 +66,7 @@ public class AddVotingConfigExclusionsRequest extends MasterNodeRequest<AddVotin
     private final TimeValue timeout;
 
     /**
-     * Construct a request to add voting config exclusions for master-eligible nodes matching the given node names, and wait for a
+     * Construct a request to add voting config exclusions for cluster-manager-eligible nodes matching the given node names, and wait for a
      * default 30 seconds for these exclusions to take effect, removing the nodes from the voting configuration.
      * @param nodeNames Names of the nodes to add - see {@link AddVotingConfigExclusionsRequest#resolveVotingConfigExclusions(ClusterState)}
      */
@@ -75,7 +75,7 @@ public AddVotingConfigExclusionsRequest(String... nodeNames) {
     }
 
     /**
-     * Construct a request to add voting config exclusions for master-eligible nodes matching the given descriptions, and wait for these
+     * Construct a request to add voting config exclusions for cluster-manager-eligible nodes matching the given descriptions, and wait for these
      * nodes to be removed from the voting configuration.
      * @param nodeDescriptions Descriptions of the nodes whose exclusions to add - see {@link DiscoveryNodes#resolveNodes(String...)}.
      * @param nodeIds Ids of the nodes whose exclusions to add - see
@@ -136,7 +136,9 @@ Set<VotingConfigExclusion> resolveVotingConfigExclusions(ClusterState currentSta
 
             if (newVotingConfigExclusions.isEmpty()) {
                 throw new IllegalArgumentException(
-                    "add voting config exclusions request for " + Arrays.asList(nodeDescriptions) + " matched no master-eligible nodes"
+                    "add voting config exclusions request for "
+                        + Arrays.asList(nodeDescriptions)
+                        + " matched no cluster-manager-eligible nodes"
                 );
             }
         } else if (nodeIds.length >= 1) {

server/src/main/java/org/opensearch/cluster/InternalClusterInfoService.java

@@ -77,7 +77,7 @@
  * InternalClusterInfoService provides the ClusterInfoService interface,
  * routinely updated on a timer. The timer can be dynamically changed by
  * setting the <code>cluster.info.update.interval</code> setting (defaulting
- * to 30 seconds). The InternalClusterInfoService only runs on the master node.
+ * to 30 seconds). The InternalClusterInfoService only runs on the cluster-manager node.
  * Listens for changes in the number of data nodes and immediately submits a
  * ClusterInfoUpdateJob if a node has been added.
  *
@@ -109,7 +109,7 @@ public class InternalClusterInfoService implements ClusterInfoService, ClusterSt
     private volatile ImmutableOpenMap<String, DiskUsage> leastAvailableSpaceUsages;
     private volatile ImmutableOpenMap<String, DiskUsage> mostAvailableSpaceUsages;
     private volatile IndicesStatsSummary indicesStatsSummary;
-    // null if this node is not currently the master
+    // null if this node is not currently the cluster-manager
     private final AtomicReference<RefreshAndRescheduleRunnable> refreshAndRescheduleRunnable = new AtomicReference<>();
     private volatile boolean enabled;
     private volatile TimeValue fetchTimeout;
@@ -150,8 +150,8 @@ void setUpdateFrequency(TimeValue updateFrequency) {
     @Override
     public void clusterChanged(ClusterChangedEvent event) {
         if (event.localNodeMaster() && refreshAndRescheduleRunnable.get() == null) {
-            logger.trace("elected as master, scheduling cluster info update tasks");
-            executeRefresh(event.state(), "became master");
+            logger.trace("elected as cluster-manager, scheduling cluster info update tasks");
+            executeRefresh(event.state(), "became cluster-manager");
 
             final RefreshAndRescheduleRunnable newRunnable = new RefreshAndRescheduleRunnable();
             refreshAndRescheduleRunnable.set(newRunnable);
@@ -535,7 +535,7 @@ protected void doRun() {
             if (this == refreshAndRescheduleRunnable.get()) {
                 super.doRun();
             } else {
-                logger.trace("master changed, scheduled refresh job is stale");
+                logger.trace("cluster-manager changed, scheduled refresh job is stale");
             }
         }
 

server/src/main/java/org/opensearch/cluster/coordination/ClusterBootstrapService.java

@@ -135,7 +135,7 @@ public ClusterBootstrapService(
                         + DiscoveryModule.DISCOVERY_TYPE_SETTING.getKey()
                         + "] set to ["
                         + DiscoveryModule.SINGLE_NODE_DISCOVERY_TYPE
-                        + "] must be master-eligible"
+                        + "] must be cluster-manager-eligible"
                 );
             }
             bootstrapRequirements = Collections.singleton(Node.NODE_NAME_SETTING.get(settings));
@@ -219,7 +219,7 @@ void scheduleUnconfiguredBootstrap() {
 
         logger.info(
             "no discovery configuration found, will perform best-effort cluster bootstrapping after [{}] "
-                + "unless existing master is discovered",
+                + "unless existing cluster-manager is discovered",
             unconfiguredBootstrapTimeout
         );
 

server/src/main/java/org/opensearch/cluster/coordination/ClusterFormationFailureHelper.java

@@ -192,7 +192,7 @@ String getDescription() {
             );
 
             if (clusterState.nodes().getLocalNode().isMasterNode() == false) {
-                return String.format(Locale.ROOT, "master not discovered yet: %s", discoveryStateIgnoringQuorum);
+                return String.format(Locale.ROOT, "cluster-manager not discovered yet: %s", discoveryStateIgnoringQuorum);
             }
 
             if (clusterState.getLastAcceptedConfiguration().isEmpty()) {
@@ -203,14 +203,14 @@ String getDescription() {
                 } else {
                     bootstrappingDescription = String.format(
                         Locale.ROOT,
-                        "this node must discover master-eligible nodes %s to bootstrap a cluster",
+                        "this node must discover cluster-manager-eligible nodes %s to bootstrap a cluster",
                         INITIAL_CLUSTER_MANAGER_NODES_SETTING.get(settings)
                     );
                 }
 
                 return String.format(
                     Locale.ROOT,
-                    "master not discovered yet, this node has not previously joined a bootstrapped cluster, and %s: %s",
+                    "cluster-manager not discovered yet, this node has not previously joined a bootstrapped cluster, and %s: %s",
                     bootstrappingDescription,
                     discoveryStateIgnoringQuorum
                 );
@@ -221,7 +221,7 @@ String getDescription() {
             if (clusterState.getLastCommittedConfiguration().equals(VotingConfiguration.MUST_JOIN_ELECTED_MASTER)) {
                 return String.format(
                     Locale.ROOT,
-                    "master not discovered yet and this node was detached from its previous cluster, have discovered %s; %s",
+                    "cluster-manager not discovered yet and this node was detached from its previous cluster, have discovered %s; %s",
                     foundPeers,
                     discoveryWillContinueDescription
                 );
@@ -250,7 +250,7 @@ String getDescription() {
 
             return String.format(
                 Locale.ROOT,
-                "master not discovered or elected yet, an election requires %s, have discovered %s which %s; %s",
+                "cluster-manager not discovered or elected yet, an election requires %s, have discovered %s which %s; %s",
                 quorumDescription,
                 foundPeers,
                 isQuorumOrNot,
@@ -269,8 +269,8 @@ private String describeQuorum(VotingConfiguration votingConfiguration) {
 
             if (nodeIds.size() == 1) {
                 if (nodeIds.contains(GatewayMetaState.STALE_STATE_CONFIG_NODE_ID)) {
-                    return "one or more nodes that have already participated as master-eligible nodes in the cluster but this node was "
-                        + "not master-eligible the last time it joined the cluster";
+                    return "one or more nodes that have already participated as cluster-manager-eligible nodes in the cluster but this node was "
+                        + "not cluster-manager-eligible the last time it joined the cluster";
                 } else {
                     return "a node with id " + realNodeIds;
                 }