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https://issues.apache.org/jira/browse/HBASE-27905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17729068#comment-17729068
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ruanhui commented on HBASE-27905:
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hi duo [~zhangduo]
I posted a document and listed the problems I can think of. It is relatively
simple. If you think there is anything to add, please let me know. A PR is also
submitted, It's just the initial version, there must be a lot of room for
improvement, you are welcome to give me some comments and guidance.
https://github.com/apache/hbase/pull/5267
> Directly schedule procedures that do not need to acquire locks
> --------------------------------------------------------------
>
> Key: HBASE-27905
> URL: https://issues.apache.org/jira/browse/HBASE-27905
> Project: HBase
> Issue Type: Improvement
> Components: proc-v2
> Affects Versions: 3.0.0-alpha-3
> Reporter: ruanhui
> Assignee: ruanhui
> Priority: Minor
> Fix For: 3.0.0-alpha-4
>
>
> Currently, in the procedure scheduler, we will not schedule any other
> procedures for a given queue if a procedure has held the exclusive lock, even
> if a procedure does not require any locks. For such procedures that do not
> require locks, we prefer that they can be executed directly without waiting
> until the procedure that held the exclusive lock is executed before starting
> to schedule execution. Otherwise, if the procedure holding the exclusive lock
> is stuck, the procedure that does not need the lock will also wait forever.
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