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From "Xuan Gong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1574) When RM transit from Active to Standby, the same eventDispatcher should not be registered more than once
Date Fri, 10 Jan 2014 19:05:51 GMT

    [ https://issues.apache.org/jira/browse/YARN-1574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13868137#comment-13868137
] 

Xuan Gong commented on YARN-1574:
---------------------------------

bq. Quickly looked at the patch, would be nice to add a test for CompositeService#removeService
as well - add a couple of services and remove one and check count?

added

> When RM transit from Active to Standby, the same eventDispatcher should not be registered
more than once
> --------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-1574
>                 URL: https://issues.apache.org/jira/browse/YARN-1574
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>            Priority: Blocker
>         Attachments: YARN-1574.1.patch, YARN-1574.1.patch, YARN-1574.2.patch, YARN-1574.2.patch,
YARN-1574.3.patch, YARN-1574.4.patch, YARN-1574.5.patch, YARN-1574.6.patch
>
>
> Currently, we move rmDispatcher out of ActiveService. But we still register the Event
dispatcher, such as schedulerDispatcher, RMAppEventDispatcher when we initiate the ActiveService.
> Almost every time when we transit RM from Active to Standby,  we need to initiate the
ActiveService. That means we will register the same event Dispatcher which will cause the
same event will be handled several times.



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