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https://issues.apache.org/jira/browse/HDFS-6518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14032869#comment-14032869
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Colin Patrick McCabe commented on HDFS-6518:
--------------------------------------------
Yeah, I agree that we need to take the FSN read lock there. +1. Thanks
Yongjun.
> TestCacheDirectives#testExceedsCapacity should take FSN read lock when
> accessing pendingCached list
> ---------------------------------------------------------------------------------------------------
>
> Key: HDFS-6518
> URL: https://issues.apache.org/jira/browse/HDFS-6518
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.5.0
> Reporter: Yongjun Zhang
> Assignee: Andrew Wang
> Attachments: HDFS-6518.001.patch
>
>
> Observed from
> https://builds.apache.org/job/PreCommit-HDFS-Build/7080//testReport/
> Test
> org.apache.hadoop.hdfs.server.namenode.TestCacheDirectives.testExceedsCapacity
> fails intermittently
> {code}
> Failing for the past 1 build (Since Failed#7080 )
> Took 7.3 sec.
> Stacktrace
> 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.namenode.TestCacheDirectives.checkPendingCachedEmpty(TestCacheDirectives.java:1416)
> at
> org.apache.hadoop.hdfs.server.namenode.TestCacheDirectives.testExceedsCapacity(TestCacheDirectives.java:1437)
> {code}
> A second run with the same code is successful,
> https://builds.apache.org/job/PreCommit-HDFS-Build/7082//testReport/
> Running it locally is also successful.
> HDFS-6257 mentioned about possible race, maybe the issue is still there.
> Thanks.
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