Baolong Mao created HADOOP-17446:
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Summary: Print the thread parker and lock information in stacks
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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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