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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-12163) Ozone: MiniOzoneCluster uses 400+ threads
Date Wed, 26 Jul 2017 09:55:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16101467#comment-16101467
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Weiwei Yang edited comment on HDFS-12163 at 7/26/17 9:55 AM:
-------------------------------------------------------------

Got a bit occupied with delete key work, won't be able to work on this too soon :(. If anybody
likes to take over, please go ahead. Otherwise I will revisit this after that part is done.:)


was (Author: cheersyang):
Got a bit occupied with delete key work, won't be working on this too soon :(. If anybody
likes to take over, please go ahead. Otherwise I will revisit this after that part is done.:)

> Ozone: MiniOzoneCluster uses 400+ threads
> -----------------------------------------
>
>                 Key: HDFS-12163
>                 URL: https://issues.apache.org/jira/browse/HDFS-12163
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone, test
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Weiwei Yang
>         Attachments: TestOzoneThreadCount20170719.patch
>
>
> Checked the number of active threads used in MiniOzoneCluster with various settings:
> - Local handlers
> - Distributed handlers
> - Ratis-Netty
> - Ratis-gRPC
> The results are similar for all the settings.  It uses 400+ threads for an 1-datanode
MiniOzoneCluster.
> Moreover, there is a thread leak -- a number of the threads do not shutdown after the
test is finished.  Therefore, when tests run consecutively, the later tests use more threads.
> Will post the details in comments.



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