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https://issues.apache.org/jira/browse/HDFS-7471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14310232#comment-14310232
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Tsz Wo Nicholas Sze commented on HDFS-7471:
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[~kihwal], do you want to take a look the patch?
testNumVersionsReportedCorrect was added by HDFS-3245.
> TestDatanodeManager#testNumVersionsReportedCorrect occasionally fails
> ---------------------------------------------------------------------
>
> Key: HDFS-7471
> URL: https://issues.apache.org/jira/browse/HDFS-7471
> Project: Hadoop HDFS
> Issue Type: Test
> Components: test
> Affects Versions: 3.0.0
> Reporter: Ted Yu
> Assignee: Binglin Chang
> Attachments: HDFS-7471.001.patch
>
>
> From https://builds.apache.org/job/Hadoop-Hdfs-trunk/1957/ :
> {code}
> FAILED:
> org.apache.hadoop.hdfs.server.blockmanagement.TestDatanodeManager.testNumVersionsReportedCorrect
> Error Message:
> The map of version counts returned by DatanodeManager was not what it was
> expected to be on iteration 237 expected:<0> but was:<1>
> Stack Trace:
> java.lang.AssertionError: The map of version counts returned by
> DatanodeManager was not what it was expected to be on iteration 237
> expected:<0> but was:<1>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:743)
> at org.junit.Assert.assertEquals(Assert.java:118)
> at org.junit.Assert.assertEquals(Assert.java:555)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.TestDatanodeManager.testNumVersionsReportedCorrect(TestDatanodeManager.java:150)
> {code}
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