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https://issues.apache.org/jira/browse/HDFS-15048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16995388#comment-16995388
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Masatake Iwasaki commented on HDFS-15048:
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{quote}it is ok since there is supposed to be just one DirectoryScanner in a
DataNode except for a test case.
{quote}
Sure. The problems is that {{DataNodeTestUtils#runDirectoryScanner}} calls
{{DirectoryScanner#reconcile}} from outside. I'd not like to update the
DirectoryScanner a lot just for test utils. Suppressing the warning should be
enough.
> Fix findbug in DirectoryScanner
> -------------------------------
>
> Key: HDFS-15048
> URL: https://issues.apache.org/jira/browse/HDFS-15048
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Takanobu Asanuma
> Assignee: Masatake Iwasaki
> Priority: Major
> Attachments: HDFS-15048.001.patch
>
>
> There is a findbug in DirectoryScanner.
> {noformat}
> Multithreaded correctness Warnings
> org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.reconcile() calls
> Thread.sleep() with a lock held
> Bug type SWL_SLEEP_WITH_LOCK_HELD (click for details)
> In class org.apache.hadoop.hdfs.server.datanode.DirectoryScanner
> In method org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.reconcile()
> At DirectoryScanner.java:[line 441]
> {noformat}
> https://builds.apache.org/job/PreCommit-HDFS-Build/28498/artifact/out/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-warnings.html
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