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Posted to common-issues@hadoop.apache.org by "Baolong Mao (Jira)" <ji...@apache.org> on 2020/12/25 00:33:00 UTC

[jira] [Created] (HADOOP-17446) Print the thread parker and lock information in stacks page

Baolong Mao created HADOOP-17446:
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             Summary: 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
         Attachments: image-2020-12-25-08-32-32-982.png

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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