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Posted to issues@hive.apache.org by "Eugene Chung (Jira)" <ji...@apache.org> on 2021/01/06 04:00:01 UTC
[jira] [Comment Edited] (HIVE-22753) Fix gradual mem leak:
Operationlog related appenders should be cleared up on errors
[ https://issues.apache.org/jira/browse/HIVE-22753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17259396#comment-17259396 ]
Eugene Chung edited comment on HIVE-22753 at 1/6/21, 3:59 AM:
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[~chengyong] I also applied this patch to Hive 3.1.2 and logs 'closed recently' were found. But still RandomAccessFileAppender instances were leaked.
was (Author: euigeun_chung):
[~chengyong] I also applied this patch to Hive 3.1.2 and logs 'closed recently' were found. But still RandomAccessFileAppender instances were leaked.
!image-2021-01-06-12-57-25-705.png|width=890,height=59!
!image-2021-01-06-12-58-34-088.png|width=851,height=395!
> Fix gradual mem leak: Operationlog related appenders should be cleared up on errors
> ------------------------------------------------------------------------------------
>
> Key: HIVE-22753
> URL: https://issues.apache.org/jira/browse/HIVE-22753
> Project: Hive
> Issue Type: Improvement
> Components: HiveServer2
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Minor
> Fix For: 4.0.0
>
> Attachments: HIVE-22753.1.patch, HIVE-22753.2.patch, HIVE-22753.3.patch, HIVE-22753.4.patch, image-2020-01-21-11-14-37-911.png, image-2020-01-21-11-17-59-279.png, image-2020-01-21-11-18-37-294.png
>
>
> In case of exception in SQLOperation, operational log does not get cleared up. This causes gradual build up of HushableRandomAccessFileAppender causing HS2 to OOM after some time.
> !image-2020-01-21-11-14-37-911.png|width=431,height=267!
>
> Allocation tree
> !image-2020-01-21-11-18-37-294.png|width=425,height=178!
>
> Prod instance mem
> !image-2020-01-21-11-17-59-279.png|width=671,height=201!
>
> Each HushableRandomAccessFileAppender holds internal ref to RandomAccessFileAppender which holds a 256 KB bytebuffer, causing the mem leak.
> Related ticket: HIVE-18820
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