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https://issues.apache.org/jira/browse/HDFS-10260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15230484#comment-15230484
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Rushabh S Shah commented on HDFS-10260:
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bq. Were you also able to find out what caused the test failure?
I am not able to make it fail on my machine. It never failed on our internal
Jenkins server also.
I ran 20 times in a loop.
May be after this change we will be able to see the actual exception when it
fails on Apache Jenkins server.
> TestFsDatasetImpl#testCleanShutdownOfVolume often fails
> -------------------------------------------------------
>
> Key: HDFS-10260
> URL: https://issues.apache.org/jira/browse/HDFS-10260
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, test
> Reporter: Wei-Chiu Chuang
> Assignee: Rushabh S Shah
> Attachments: HDFS-10260-v1.patch, HDFS-10260.patch
>
>
> This test failure occurs in upstream Jenkins. Looking at the test code, I
> think it should be improved to capture the root cause of failure:
> E.g. change {{Thread.sleep(1000)}} to {{GenericTestUtils.waitFor}} and use
> {{GenericTestUtils.assertExceptionContains}} to replace
> {code}
> Assert.assertTrue(ioe.getMessage().contains(info.toString()));
> {code}
> https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/1062/testReport/junit/org.apache.hadoop.hdfs.server.datanode.fsdataset.impl/TestFsDatasetImpl/testCleanShutdownOfVolume/
> java.lang.AssertionError: null
> at org.junit.Assert.fail(Assert.java:86)
> at org.junit.Assert.assertTrue(Assert.java:41)
> at org.junit.Assert.assertTrue(Assert.java:52)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl.testCleanShutdownOfVolume(TestFsDatasetImpl.java:683)
> Standard Error
> Exception in thread "DataNode:
> [[[DISK]file:/home/jenkins/jenkins-slave/workspace/Hadoop-Hdfs-trunk-Java8/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1/,
>
> [DISK]file:/home/jenkins/jenkins-slave/workspace/Hadoop-Hdfs-trunk-Java8/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data2/]]
> heartbeating to localhost/127.0.0.1:35113" java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.getBlockReports(FsDatasetImpl.java:1714)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.shutdownBlockPool(FsDatasetImpl.java:2591)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.shutdownBlockPool(DataNode.java:1479)
> at
> org.apache.hadoop.hdfs.server.datanode.BPOfferService.shutdownActor(BPOfferService.java:411)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.cleanUp(BPServiceActor.java:494)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:749)
> at java.lang.Thread.run(Thread.java:744)
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