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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2579) Both RM's state is Active , but 1 RM is not really active.
Date Wed, 29 Oct 2014 22:52:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-2579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14189195#comment-14189195
] 

Karthik Kambatla commented on YARN-2579:
----------------------------------------

Thanks, [~rohithsharma]. Looking at the tests and your explanation, I think I see what you
are saying. 

However, looking into the code, I am not convinced it is draining out that is causing this
issue. {{rmDispatcher}} is an {{AsyncDispatcher}}, with {{drainEventsOnStop}} always false.
So, {{rmDispatcher.stop()}} shouldn't lead to any draining of events. I noticed a couple of
other issues in the AsyncDispatcher code:
# {{eventHandlerThread.join}} in serviceStop should take a timeout as well
# {{dispatch(event)}} in AsyncDispatcher#createThread doesn't have a try-catch block 

With the current patch, I wonder if there are any unexpected side-effects. 

> Both RM's state is Active , but 1 RM is not really active.
> ----------------------------------------------------------
>
>                 Key: YARN-2579
>                 URL: https://issues.apache.org/jira/browse/YARN-2579
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.5.1
>            Reporter: Rohith
>            Assignee: Rohith
>         Attachments: YARN-2579.patch, YARN-2579.patch
>
>
> I encountered a situaltion where both RM's web page was able to access and its state
displayed as Active. But One of the RM's ActiveServices were stopped.



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