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https://issues.apache.org/jira/browse/HDFS-15297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17092391#comment-17092391
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Mingliang Liu commented on HDFS-15297:
--------------------------------------

+1 after the checkstyle is fixed.

> TestNNHandlesBlockReportPerStorage::blockReport_02 fails intermittently in 
> trunk
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-15297
>                 URL: https://issues.apache.org/jira/browse/HDFS-15297
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode, test
>    Affects Versions: 3.4.0
>            Reporter: Mingliang Liu
>            Assignee: Ayush Saxena
>            Priority: Major
>         Attachments: HDFS-15297-01.patch, HDFS-15297-02.patch, 
> HDFS-15297-03.patch
>
>
> It fails intermittently on {{trunk}} branch. Not sure about other branches. 
> Example builds are:
> - 
> https://builds.apache.org/job/hadoop-multibranch/job/PR-1964/4/testReport/org.apache.hadoop.hdfs.server.datanode/TestNNHandlesBlockReportPerStorage/blockReport_02/
> - <To add more>
> Sample exception stack:
> {quote}
> java.lang.AssertionError: Wrong number of MissingBlocks is found expected:<2> 
> but was:<1>
>       at org.junit.Assert.fail(Assert.java:88)
>       at org.junit.Assert.failNotEquals(Assert.java:834)
>       at org.junit.Assert.assertEquals(Assert.java:645)
>       at 
> org.apache.hadoop.hdfs.server.datanode.BlockReportTestBase.blockReport_02(BlockReportTestBase.java:336)
>       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)
> {quote}



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