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Weiwei Yang commented on HDFS-12163: ------------------------------------ Hi [~anu] Here is the result after set 20 handler for KSM, | (distributed,1) | init | 6 | | (distributed,1) | MiniOzoneCluster | 222 | | (distributed,1) | shutdown | 80 | | (distributed,1) | sleep | 13 | I will overwrite this value to 20 in {{MiniOzoneCluster}} since 200 is not necessary for testing. > 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: most_used_threads.png, > TestOzoneThreadCount20170719.patch, 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. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org