Disruptor event clear #546
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Actionable comments posted: 5
🧹 Outside diff range and nitpick comments (7)
tracer-core/src/main/java/com/alipay/common/tracer/core/appender/manager/ObjectEvent.java (2)
12-15: LGTM: Interface declaration is correct. Consider adding Javadoc.The
ObjectEventinterface and itsclear()method are well-defined. To improve documentation, consider adding a Javadoc comment for theclear()method explaining its purpose and any side effects.Here's a suggested Javadoc comment:
/** * Clears or resets the state of the object implementing this interface. * This method should be called after processing the event to facilitate garbage collection. */ void clear();
1-15: LGTM: Well-structured interface aligning with PR objectives.The
ObjectEventinterface is well-structured and focused on a single responsibility. Itsclear()method directly addresses the PR objective of ensuring that Disruptor consumers can reset event content, facilitating garbage collection during Young Generation Collection (YGC). This implementation should help improve memory management in low traffic scenarios.To fully realize the benefits of this interface:
- Ensure all relevant event classes implement this interface.
- Update the Disruptor consumer to call the
clear()method after processing each event.- Consider adding unit tests to verify the
clear()method's behavior in implementing classes.tracer-core/src/main/java/com/alipay/common/tracer/core/appender/manager/StringEvent.java (1)
36-39: LGTM: clear() method implementationThe
clear()method implementation is straightforward and effectively addresses the PR objectives by setting thestringproperty to null.Consider adding a null check before calling
setString(null)to avoid unnecessary method calls:@Override public void clear() { - setString(null); + if (string != null) { + setString(null); + } }This change would prevent unnecessary method calls when the
stringis already null, potentially improving performance in high-frequency scenarios.tracer-core/src/main/java/com/alipay/common/tracer/core/appender/manager/SofaTracerSpanEvent.java (2)
24-24: LGTM! Consider adding a comment explaining the purpose of implementing ObjectEvent.The implementation of the
ObjectEventinterface aligns with the PR objectives to address the issue of span events escaping to the old generation. This change enables the class to support the clearing of its state, which can help with garbage collection.Consider adding a brief comment above the class declaration to explain why
SofaTracerSpanEventimplementsObjectEvent. This would help future developers understand the rationale behind this design decision.
45-48: LGTM! Consider adding synchronization for thread safety.The
clear()method implementation effectively sets thesofaTracerSpanto null, which aligns with the PR objectives. This will help facilitate garbage collection of these events during Young Generation Collection (YGC).For improved thread safety, consider adding synchronization to the
clear()method:@Override -public void clear() { +public synchronized void clear() { setSofaTracerSpan(null); }This ensures that the clearing operation is atomic and prevents potential race conditions in multi-threaded scenarios.
tracer-core/src/main/java/com/alipay/common/tracer/core/appender/manager/AsyncCommonAppenderManager.java (1)
168-168: Approve the addition ofevent.clear()with a minor suggestion.The addition of
event.clear()after processing the event is a good practice. It helps in resetting the event object, potentially aiding garbage collection and addressing the issue of span events escaping to the old generation in low traffic scenarios.However, consider moving the
clear()call to afinallyblock to ensure it's always called, even if an exception occurs during appending or flushing. This would guarantee that the event is cleared regardless of the outcome of the log writing process.Here's a suggested refactoring:
try { appender.append(string); appender.flush(); - event.clear(); } catch (Exception e) { //todo Globally keep a synchronized log for synchronizing print logs at some key points if (string != null) { SynchronizingSelfLog.error("fail to async write log", e); } else { SynchronizingSelfLog.error( "fail to async write log.And the sofaTracerSpanContext is null", e); } +} finally { + event.clear(); }This change ensures that
event.clear()is always called, improving the robustness of the event handling process.pom.xml (1)
Line range hint
52-52: Fix typo in maven.gpg.plugin property name.There's a typo in the property name for the Maven GPG plugin. This should be corrected to ensure proper configuration.
Please apply the following change:
- <maven.gpg.pluign>1.6</maven.gpg.pluign> + <maven.gpg.plugin>1.6</maven.gpg.plugin>
🛑 Comments failed to post (5)
sofa-tracer-plugins/sofa-tracer-springmessage-plugin/pom.xml (1)
8-8: 💡 Codebase verification
Issue Found: Inconsistent Version Number in Root
pom.xmlThe root
pom.xmldeclares the project version as3.1.0, which is inconsistent with the3.1.8-SNAPSHOTversion used in other modules.
- Location:
pom.xmlat the repository root contains<version>3.1.0</version>Please update the root
pom.xmlto<version>3.1.8-SNAPSHOT</version>to ensure consistency across all modules.🔗 Analysis chain
LGTM: Version update to development SNAPSHOT
The parent version has been correctly updated to 3.1.8-SNAPSHOT, which aligns with the PR objectives. This change indicates that development for the next release has begun.
Note: Using a SNAPSHOT version means that this is now a development version and should not be used in production environments.
Let's verify if this version change is consistent across other modules in the project:
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check for consistency of version numbers across pom.xml files # Test: Search for parent version declarations in all pom.xml files # Expect: All should be 3.1.8-SNAPSHOT or explain any discrepancies echo "Checking parent version declarations:" rg --type xml '<version>3\.1\.[0-9]+(-SNAPSHOT)?</version>' -g 'pom.xml' # Test: Search for project version declarations in all pom.xml files # Expect: All should be 3.1.8-SNAPSHOT or explain any discrepancies echo "Checking project version declarations:" rg --type xml '<version>3\.1\.[0-9]+(-SNAPSHOT)?</version>' -g 'pom.xml' | rg -v '<parent>'Length of output: 5116
sofa-tracer-plugins/sofa-tracer-mongodb-plugin/pom.xml (1)
8-8: 💡 Codebase verification
Duplicate SNAPSHOT Version Entry in tracer-all/pom.xml
The file
tracer-all/pom.xmlcontains multiple instances of<version>3.1.8-SNAPSHOT</version>, which may lead to build or dependency resolution issues.Action Required:
- Remove the duplicate
<version>3.1.8-SNAPSHOT</version>entry intracer-all/pom.xmlto ensure consistency.🔗 Analysis chain
LGTM. Verify version consistency across modules.
The update of the parent version to 3.1.8-SNAPSHOT is appropriate for ongoing development. This change aligns with the overall project update.
To ensure consistency across all modules, please run the following script:
If the script produces any output for the first command or if the counts don't match in the second part, please ensure all modules are consistently updated.
Inconsistency Detected in SNAPSHOT Version Updates
The version count for
<version>3.1.8-SNAPSHOT</version>exceeds the total number of pom.xml files, indicating an unexpected pom.xml file may still be referencing the old version or an unintended module has been added.Action Required:
- Identify the pom.xml file(s) that are not part of the standard modules or are incorrectly referencing the SNAPSHOT version.
Inconsistency Identified in SNAPSHOT Version Updates
A discrepancy exists where 27 pom.xml files reference
<version>3.1.8-SNAPSHOT</version>, but only 26 pom.xml files are present in the repository. This suggests that one pom.xml file may contain multiple references or an unintended pom.xml file exists.Action Required:
- Identify pom.xml files with multiple
<version>3.1.8-SNAPSHOT</version>entries.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that all modules have been updated to the new SNAPSHOT version # Test: Check for any pom.xml files still using the old version # Expect: No output, indicating all have been updated rg --type xml '<version>3\.1\.7</version>' -g 'pom.xml' # Test: Confirm all pom.xml files are using the new SNAPSHOT version # Expect: Count of occurrences should match the total number of pom.xml files rg --type xml '<version>3\.1\.8-SNAPSHOT</version>' -g 'pom.xml' | wc -l fd -g 'pom.xml' | wc -lLength of output: 158
Script:
#!/bin/bash # Description: List all pom.xml files containing the SNAPSHOT version to identify discrepancies rg --type xml '<version>3\.1\.8-SNAPSHOT</version>' -g 'pom.xml' --files-with-matchesLength of output: 1281
Script:
#!/bin/bash # Description: Identify pom.xml files containing multiple instances of the SNAPSHOT version # List pom.xml files with more than one occurrence of '<version>3.1.8-SNAPSHOT</version>' fd -g 'pom.xml' | while read -r file; do count=$(rg '<version>3\.1\.8-SNAPSHOT</version>' "$file" | wc -l) if [ "$count" -gt 1 ]; then echo "$file contains $count instances of the SNAPSHOT version." fi doneLength of output: 3861
sofa-tracer-plugins/sofa-tracer-httpclient-plugin/pom.xml (1)
8-8: 💡 Codebase verification
Version inconsistency detected across project
pom.xmlfilesThe version update to
<version>3.1.8-SNAPSHOT</version>is not consistent across allpom.xmlfiles. Specifically,tracer-all-parent/pom.xmlstill references version3.19.1.Please update the parent
pom.xmlto3.1.8-SNAPSHOTand ensure that all child modules inherit this version to maintain consistency throughout the project.🔗 Analysis chain
LGTM: Version update to 3.1.8-SNAPSHOT
The parent version has been correctly updated to 3.1.8-SNAPSHOT. This change is consistent with the PR objectives and indicates a shift to a development version.
Note: Using a SNAPSHOT version is appropriate for ongoing development, but ensure that a stable release version is used for production deployments.
Let's verify if this version change is consistent across the project:
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check if the version 3.1.8-SNAPSHOT is consistent across all pom.xml files # Test: Search for any pom.xml files that don't have the new version # Expect: No output if all files are consistent rg -t xml '<version>3\.1\.8-SNAPSHOT</version>' -l | xargs -I {} rg -t xml -v '<version>3\.1\.8-SNAPSHOT</version>' {}Length of output: 77581
sofa-tracer-plugins/sofa-tracer-zipkin-plugin/pom.xml (1)
8-8: 💡 Codebase verification
Inconsistent Version Numbers Across Modules
The root
pom.xmlhas a version of3.1.0, which does not match the3.1.8-SNAPSHOTversions in other modules. Please update the rootpom.xmlto3.1.8-SNAPSHOTto maintain consistency across the project.🔗 Analysis chain
LGTM: Version update to development SNAPSHOT
The parent version has been correctly updated to 3.1.8-SNAPSHOT, which aligns with the ongoing development to address the span events issue mentioned in the PR objectives.
Let's verify if this version change is consistent across other modules in the project:
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check for consistency of version numbers across pom.xml files # Test: Search for parent version declarations in pom.xml files # Expect: All should show 3.1.8-SNAPSHOT rg --type xml '<version>3\.1\.[0-9]+(-SNAPSHOT)?</version>' -g 'pom.xml'Length of output: 2462
tracer-core/src/main/java/com/alipay/common/tracer/core/appender/manager/AsyncCommonAppenderManager.java (1)
168-168: 💡 Codebase verification
Implement
StringEventClass withclear()MethodThe
StringEventclass does not appear to implement theObjectEventinterface, and theclear()method is missing. This can lead to runtime errors and improper event handling.
- Ensure that the
StringEventclass implements theObjectEventinterface.- Add a
clear()method to theStringEventclass that correctly resets all relevant fields.🔗 Analysis chain
Verify the implementation of
StringEvent.clear()While the addition of
event.clear()is a good practice, it's important to ensure that theclear()method in theStringEventclass properly resets all relevant fields of the event object. This is crucial for effective garbage collection and preventing memory leaks.Please run the following script to check the implementation of the
StringEventclass:Please review the output to ensure that:
- The
StringEventclass properly implements theObjectEventinterface.- The
clear()method resets all relevant fields of theStringEventobject.If the implementation is not visible or seems incomplete, consider updating the
StringEventclass to ensure proper object resetting.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the implementation of StringEvent class and its clear() method # Search for the StringEvent class definition echo "StringEvent class definition:" ast-grep --lang java --pattern $'class StringEvent implements ObjectEvent { $$$ }' # Search for the clear() method implementation in StringEvent echo "\nclear() method implementation:" ast-grep --lang java --pattern $'class StringEvent implements ObjectEvent { $$$ public void clear() { $$$ } $$$ }'Length of output: 357
Fix the issue of span events escaping to the old generation in low traffic scenarios. Ensure that the Disruptor consumer sets the carried content to null after processing the event, so it can be garbage collected during YGC.
Summary by CodeRabbit
New Features
ObjectEventto facilitate state clearing for implementing objects.SofaTracerSpanEventandStringEventclasses to implement theObjectEventinterface, adding aclear()method to reset their state.Improvements
3.1.8-SNAPSHOT, indicating ongoing development.Bug Fixes