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From "Prabhu Joseph (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-9341) Reentrant lock() before try
Date Mon, 04 Mar 2019 07:35:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-9341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prabhu Joseph updated YARN-9341:
--------------------------------
    Attachment: YARN-9341-001.patch

> 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
>         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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