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From "weiyuan (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (YARN-7135) Clean up lock-try order in common scheduler code
Date Tue, 19 Sep 2017 16:32:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-7135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

weiyuan updated YARN-7135:
--------------------------
    Comment: was deleted

(was: [~templedf], thanks for your suggestion, I updated the patch again. )

> Clean up lock-try order in common scheduler code
> ------------------------------------------------
>
>                 Key: YARN-7135
>                 URL: https://issues.apache.org/jira/browse/YARN-7135
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 3.0.0-alpha4
>            Reporter: Daniel Templeton
>            Assignee: weiyuan
>              Labels: newbie
>         Attachments: YARN-7135.001.patch, YARN-7135.002.patch
>
>
> There are many places that follow the pattern:{code}try {
>   lock.lock();
>   ...
> } finally {
>   lock.unlock();
> }{code}
> There are a couple of reasons that's a bad idea.  The correct pattern is:{code}lock.lock();
> try {
>   ...
> } finally {
>   lock.unlock();
> }{code}



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