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https://issues.apache.org/jira/browse/HADOOP-17446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18043416#comment-18043416
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ASF GitHub Bot commented on HADOOP-17446:
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github-actions[bot] closed pull request #2574: HADOOP-17446. Print the thread
parker and lock information in stacks page
URL: https://github.com/apache/hadoop/pull/2574
> Print the thread parker and lock information in stacks page
> -----------------------------------------------------------
>
> Key: HADOOP-17446
> URL: https://issues.apache.org/jira/browse/HADOOP-17446
> Project: Hadoop Common
> Issue Type: New Feature
> Components: common
> Affects Versions: 3.4.0
> Reporter: Baolong Mao
> Assignee: Baolong Mao
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2020-12-25-08-32-32-982.png
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Sometimes, our service stuck because of some lock held by other thread, but
> we can get nothing from "stacks" for ReadWriteLock, and it is widely used in
> our services, like the fslock, cplock, dirlock of namenode.
> Luckily, we can get thread parker from Thread object, it can help us see the
> thread parker clearly.
> !image-2020-12-25-08-32-32-982.png!
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