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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4424) YARN CLI command hangs
Date Tue, 08 Dec 2015 05:20:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-4424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15046380#comment-15046380
] 

Jian He commented on YARN-4424:
-------------------------------

Zhihai's [comment|https://issues.apache.org/jira/browse/YARN-2594?focusedCommentId=14148665&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14148665]
is very useful to understand this part. In short word, Thread-2 blocked for readlock, because
Thread-3 had requested the write lock first.

> YARN CLI command hangs
> ----------------------
>
>                 Key: YARN-4424
>                 URL: https://issues.apache.org/jira/browse/YARN-4424
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Yesha Vora
>            Assignee: Jian He
>            Priority: Blocker
>         Attachments: YARN-4424.1.patch
>
>
> {code}
> yarn@XXX:/mnt/hadoopqe$ /usr/hdp/current/hadoop-yarn-client/bin/yarn application -list
-appStates NEW,NEW_SAVING,SUBMITTED,ACCEPTED,RUNNING
> 15/12/04 21:59:54 INFO impl.TimelineClientImpl: Timeline service address: http://XXX:8188/ws/v1/timeline/
> 15/12/04 21:59:54 INFO client.RMProxy: Connecting to ResourceManager at XXX/0.0.0.0:8050
> 15/12/04 21:59:55 INFO client.AHSProxy: Connecting to Application History server at XXX/0.0.0.0:10200
> {code}
> {code:title=RM log}
> 2015-12-04 21:59:19,744 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 237000
> 2015-12-04 22:00:50,945 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 238000
> 2015-12-04 22:02:22,416 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 239000
> 2015-12-04 22:03:53,593 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 240000
> 2015-12-04 22:05:24,856 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 241000
> 2015-12-04 22:06:56,235 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 242000
> 2015-12-04 22:08:27,510 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 243000
> 2015-12-04 22:09:58,786 INFO  event.AsyncDispatcher (AsyncDispatcher.java:handle(243))
- Size of event-queue is 244000
> {code}



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