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From "sandflee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5375) invoke MockRM#drainEvents implicitly in MockRM methods to reduce test failures
Date Wed, 24 Aug 2016 11:24:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434730#comment-15434730
] 

sandflee commented on YARN-5375:
--------------------------------

bq. One comment from earlier patch in MockRM is need to take care whenever drain for Stastore
dispatcher, again need to wait for draining rm-dispatcher. This is required because state
store trigger another event to rm-dispatcher.
yes, we should take care of this. but double drain drain rm-dispatcher may not help, because
rm state store may have new Event again. One approach is to add a timestamp to drainDispatcher
to record newEvent add time, after drain StateStore event, we could check the timestamp of
rm-disptacher, if not updated, we could make sure that all events are drained.  

> invoke MockRM#drainEvents implicitly in MockRM methods to reduce test failures
> ------------------------------------------------------------------------------
>
>                 Key: YARN-5375
>                 URL: https://issues.apache.org/jira/browse/YARN-5375
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: sandflee
>            Assignee: sandflee
>         Attachments: YARN-5375.01.patch, YARN-5375.03.patch, YARN-5375.04.patch, YARN-5375.05.patch,
YARN-5375.06.patch
>
>
> seen many test failures related to RMApp/RMAppattempt comes to some state but some event
are not processed in rm event queue or scheduler event queue, cause test failure, seems we
could implicitly invokes drainEvents(should also drain sheduler event) in some mockRM method
like waitForState



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