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https://issues.apache.org/jira/browse/HDFS-9145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14908517#comment-14908517
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Jitendra Nath Pandey commented on HDFS-9145:
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Thanks for filing this [~jingzhao]. It will be super useful.

> 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
>
> It will be helpful that if we can have a way to track (or at least log a msg) 
> if some operation is hold the FSNamesystem lock for a long time.



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