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Posted to hdfs-issues@hadoop.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2018/04/24 20:55:07 UTC
[jira] [Commented] (HDFS-12163) Ozone: Reduce MiniOzoneCluster
handler thread count
[ https://issues.apache.org/jira/browse/HDFS-12163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16450933#comment-16450933 ]
Hudson commented on HDFS-12163:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #14057 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/14057/])
HDFS-12163. Ozone: Reduce MiniOzoneCluster handler thread count. (xyao: rev 5fd34ba1958b61ffd411cd5575878003645ec44d)
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/MiniOzoneCluster.java
> Ozone: Reduce MiniOzoneCluster handler thread count
> ---------------------------------------------------
>
> 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
> Priority: Major
> Fix For: HDFS-7240
>
> Attachments: HDFS-12163-HDFS-7240.001.patch, HDFS-12163-HDFS-7240.002.patch, TestOzoneThreadCount20170719.patch, most_used_threads.png, thread_dump.png
>
>
> 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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