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https://issues.apache.org/jira/browse/HDFS-17523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17854456#comment-17854456
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ASF GitHub Bot commented on HDFS-17523:
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ThinkerLei opened a new pull request, #6886:
URL: https://github.com/apache/hadoop/pull/6886
Add fine-grained lock held info when the lock holding time reaches the
specified threshold.
> Add fine-grained locks metrics in DataSetLockManager
> -----------------------------------------------------
>
> Key: HDFS-17523
> URL: https://issues.apache.org/jira/browse/HDFS-17523
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: lei w
> Priority: Major
>
> Currently we use fine-grained locks to manage FsDataSetImpl. But we did not
> add lock-related metrics. In some cases, we actually need lock-holding
> information to understand the time-consuming lock-holding of a certain
> operation. Using this information, we can also optimize some long-term lock
> operations as early as possible.
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