[jira] [Updated] (YARN-5939) FSDownload leaks FileSystem resources

["Weiwei Yang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-5939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Weiwei Yang updated YARN-5939:
------------------------------
    Summary: FSDownload leaks FileSystem resources  (was: Disabling the cache of FileSystem leads to case that never close the FileSystem)

> FSDownload leaks FileSystem resources
> -------------------------------------
>
>                 Key: YARN-5939
>                 URL: https://issues.apache.org/jira/browse/YARN-5939
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.5.1, 2.7.3
>            Reporter: liuxiangwei
>            Assignee: Weiwei Yang
>         Attachments: YARN-5939.01.patch, YARN-5939.02.patch
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> Background
> To use our self-defined FileSystem class, the item of configuration "fs.%s.impl.disable.cache" should set to true.
> In YARN's source code, the class named "org.apache.hadoop.yarn.util.FSDownload" use getFileSystem but never close, which leading to file descriptor leak because our self-defined FileSystem class close the file descriptor when the close function is invoked.
> My Question below:
> 1. whether invoking "getFileSystem" but never close is YARN's expected behavior 
> 2. what should we do in our self-defined FileSystem resolve it.



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