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https://issues.apache.org/jira/browse/HDFS-9145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14944555#comment-14944555
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Mingliang Liu commented on HDFS-9145:
-------------------------------------
The v0 patch simply logs the time interval, if the read/write FSLock is held
for a longer time than threshold.
> Tracking methods that hold FSNamesytemLock for too long
> -------------------------------------------------------
>
> Key: HDFS-9145
> URL: https://issues.apache.org/jira/browse/HDFS-9145
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Jing Zhao
> Assignee: Mingliang Liu
> Attachments: HDFS-9145.000.patch
>
>
> It will be helpful that if we can have a way to track (or at least log a msg)
> if some operation is holding the FSNamesystem lock for a long time.
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