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https://issues.apache.org/jira/browse/HDFS-10682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15394596#comment-15394596
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Chen Liang commented on HDFS-10682:
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The failed test is HDFSCLI, which I don't think has anything to do this patch.
And I did not see failure when doing this test locally.
> Add metric to measure lock held time in FSDataSetImpl
> -----------------------------------------------------
>
> Key: HDFS-10682
> URL: https://issues.apache.org/jira/browse/HDFS-10682
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Chen Liang
> Assignee: Chen Liang
> Attachments: HDFS-10682.001.patch, HDFS-10682.002.patch,
> HDFS-10682.003.patch, HDFS-10682.004.patch, HDFS-10682.005.patch
>
>
> Add a metric to measure the time the lock of FSDataSetImpl is held by a
> thread. The goal is to expose this for users to identify operations that
> locks dataset for long time ("long" in some sense) and be able to
> understand/reason/track the operation based on logs.
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