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From "Chen Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14677) TestDataNodeHotSwapVolumes#testAddVolumesConcurrently fails intermittently in trunk
Date Tue, 30 Jul 2019 03:55:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16895746#comment-16895746
] 

Chen Zhang commented on HDFS-14677:
-----------------------------------

Thanks [~ayushtkn] [~elgoiri] for your comments

I've run the test repeatedly for 1000 times without the patch, it failed 3 times. After patch,
it didn't fail.

> TestDataNodeHotSwapVolumes#testAddVolumesConcurrently fails intermittently in trunk
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-14677
>                 URL: https://issues.apache.org/jira/browse/HDFS-14677
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Chen Zhang
>            Assignee: Chen Zhang
>            Priority: Major
>         Attachments: HDFS-14677.001.patch
>
>
> Stacktrace:
> {code:java}
> java.lang.NullPointerException
> 	at org.apache.hadoop.hdfs.server.datanode.TestDataNodeHotSwapVolumes.testAddVolumesConcurrently(TestDataNodeHotSwapVolumes.java:615)
> 	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$1.runReflectiveCall(FrameworkMethod.java:50)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> 	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
> 	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> 	at java.lang.Thread.run(Thread.java:748)
> {code}
> see: [https://builds.apache.org/job/PreCommit-HDFS-Build/27328/testReport/org.apache.hadoop.hdfs.server.datanode/TestDataNodeHotSwapVolumes/testAddVolumesConcurrently/]
> and [https://builds.apache.org/job/PreCommit-HDFS-Build/27312/testReport/org.apache.hadoop.hdfs.server.datanode/TestDataNodeHotSwapVolumes/testAddVolumesConcurrently/]



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