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https://issues.apache.org/jira/browse/FLUME-2482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14156294#comment-14156294
]
Santiago M. Mola commented on FLUME-2482:
-----------------------------------------
I've got no patch yet. But yes, it seems a bug in the test: it is forcing a
checkpoint while Log is already checkpointing in a different thread.
> Race condition in File Channels' Log.removeOldLogs
> --------------------------------------------------
>
> Key: FLUME-2482
> URL: https://issues.apache.org/jira/browse/FLUME-2482
> Project: Flume
> Issue Type: Bug
> Components: File Channel
> Affects Versions: v1.5.0.1
> Reporter: Santiago M. Mola
> Labels: race-condition
> Fix For: v1.6.0
>
>
> TestFileChannelRestart.testToggleCheckpointCompressionFromFalseToTrue
> sometimes produces a race condition at Log.removeOldLogs.
> https://travis-ci.org/Stratio/flume/jobs/36782318#L6193
> testToggleCheckpointCompressionFromFalseToTrue(org.apache.flume.channel.file.TestFileChannelRestart)
> Time elapsed: 144362 sec <<< ERROR!
> java.util.ConcurrentModificationException
> at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
> at java.util.ArrayList$Itr.next(ArrayList.java:831)
> at org.apache.flume.channel.file.Log.removeOldLogs(Log.java:1070)
> at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:1055)
> at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at org.fest.reflect.method.Invoker.invoke(Invoker.java:110)
> at org.apache.flume.channel.file.TestUtils.forceCheckpoint(TestUtils.java:134)
> at
> org.apache.flume.channel.file.TestFileChannelRestart.restartToggleCompression(TestFileChannelRestart.java:930)
> at
> org.apache.flume.channel.file.TestFileChannelRestart.testToggleCheckpointCompressionFromFalseToTrue(TestFileChannelRestart.java:896)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
> at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
> at
> org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
> at
> org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
> at
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
> at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
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