[jira] [Commented] (HIVE-20979) Fix memory leak in hive streaming

["Alex Parrill (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-20979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17037270#comment-17037270 ] 

Alex Parrill commented on HIVE-20979:
-------------------------------------

This patch isn't in 3.1.1 or 3.1.2, despite what the fix versions says.

It's relatively easy to work around at least; just subclass whatever writer you want to use, and override the {{close}} method to call {{fs.close()}} after calling {{super.close()}}.

> Fix memory leak in hive streaming
> ---------------------------------
>
>                 Key: HIVE-20979
>                 URL: https://issues.apache.org/jira/browse/HIVE-20979
>             Project: Hive
>          Issue Type: Bug
>          Components: Streaming
>    Affects Versions: 3.1.1
>            Reporter: Shubham Chaurasia
>            Assignee: Shubham Chaurasia
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: 4.0.0, 3.1.1
>
>         Attachments: HIVE-20979.1.patch, HIVE-20979.1.patch, HIVE-20979.2.patch, HIVE-20979.3.patch, HIVE-20979.4.patch, HIVE-20979.5.patch
>
>
> {{1) HiveStreamingConnection.Builder#init() adds a shutdown hook handler via }}{{ShutdownHookManager.addShutdownHook but it is never removed which causes all the handlers to accumulate and hence a memory leak.}}
> 2) AbstractRecordWriter creates an instance of FileSystem but does not close it which in turn causes a leak due to accumulation in FileSystem$Cache#map
>  



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