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https://issues.apache.org/jira/browse/YARN-9341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16787432#comment-16787432
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Prabhu Joseph commented on YARN-9341:
-------------------------------------
Thanks [~eyang] and [~wilfreds]!
> Reentrant lock() before try
> ---------------------------
>
> Key: YARN-9341
> URL: https://issues.apache.org/jira/browse/YARN-9341
> Project: Hadoop YARN
> Issue Type: Bug
> Components: yarn
> Affects Versions: 3.1.0
> Reporter: Prabhu Joseph
> Assignee: Prabhu Joseph
> Priority: Minor
> Fix For: 3.3.0
>
> Attachments: YARN-9341-001.patch
>
>
> As a best practice - Reentrant lock has to be acquired before try clause.
> https://stackoverflow.com/questions/31058681/java-locking-structure-best-pattern
> There are many places where lock is obtained inside try.
> {code}
> try {
> this.writeLock.lock();
> ....
> } finally {
> this.writeLock.unlock();
> }
> {code}
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