[HDDS-4070] Design a god view for LockManager to search the lockHolder of each lock

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.0.0
• Component/s: Ozone Manager
• Assignee: Baolong Mao
• Reporter: Baolong Mao
• Created: 06/Aug/20 02:07
• Updated: 07/Aug/20 05:29

Description

Some time, low frequency, some of the bucket has been locked, I got nothing valuable information from jstack and log, after some effort, i just know a bucket has been locked, and many thread waiting for this lock, but I don't know which thread locked this lock, and how about the state of that thread now. Eventually, i give up, and restart the OM, anything goes well as normal.

We have two jstack file, the create time like:
Aug 3 21:10 a.txt
Aug 4 10:09 b.txt
Aug 4 10:44 b2.txt