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https://issues.apache.org/jira/browse/HADOOP-18526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17641458#comment-17641458
]
ASF GitHub Bot commented on HADOOP-18526:
-----------------------------------------
steveloughran commented on PR #5144:
URL: https://github.com/apache/hadoop/pull/5144#issuecomment-1332518475
next pr logs stack at trace
```
2022-11-30 17:38:32,062 [setup] DEBUG s3a.S3AFileSystem
(S3AFileSystem.java:initialize(460)) - Initializing S3AFileSystem for
stevel-london
2022-11-30 17:38:32,062 [setup] TRACE s3a.S3AFileSystem
(S3AFileSystem.java:initialize(464)) - Filesystem for s3a://stevel-london/
creation stack
java.lang.RuntimeException: org.apache.hadoop.fs.s3a.S3AFileSystem@56b21fd5
at
org.apache.hadoop.fs.s3a.S3AFileSystem.initialize(S3AFileSystem.java:465)
at
org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3595)
at org.apache.hadoop.fs.FileSystem.access$300(FileSystem.java:171)
at
org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3696)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3647)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:555)
at
org.apache.hadoop.fs.contract.AbstractBondedFSContract.init(AbstractBondedFSContract.java:72)
at
org.apache.hadoop.fs.contract.AbstractFSContractTestBase.setup(AbstractFSContractTestBase.java:189)
at
org.apache.hadoop.fs.s3a.AbstractS3ATestBase.setup(AbstractS3ATestBase.java:111)
at
org.apache.hadoop.fs.s3a.ITestS3AUnbuffer.setup(ITestS3AUnbuffer.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at
org.junit.internal.runners.statements.RunBefores.invokeMethod(RunBefores.java:33)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:750)
```
> Leak of S3AInstrumentation instances via hadoop Metrics references
> ------------------------------------------------------------------
>
> Key: HADOOP-18526
> URL: https://issues.apache.org/jira/browse/HADOOP-18526
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.4
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
>
> A heap dump of a process running OOM shows that if a process creates then
> destroys lots of S3AFS instances, you seem to run out of heap due to
> references to S3AInstrumentation and the IOStatisticsStore kept via the
> hadoop metrics registry
> It doesn't look like S3AInstrumentation.close() is being invoked in
> S3AFS.close(). it should -with the IOStats being snapshotted to a local
> reference before this happens. This allows for stats of a closed fs to be
> examined.
> If you look at org.apache.hadoop.ipc.DecayRpcScheduler.MetricsProxy it uses a
> WeakReference to refer back to the larger object. we should do the same for
> abfs/s3a bindings. ideally do some template proxy class in hadoop common they
> can both use.
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