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https://issues.apache.org/jira/browse/YARN-402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16283150#comment-16283150
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stefanlee commented on YARN-402:
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thanks [~djp] our cluster will be very busy between 3.00 a.m. and 7.00 a.m. the
event-queue size will be 4000 to 5000, so how can i optimize this?
> Dispatcher warn message is too late
> -----------------------------------
>
> Key: YARN-402
> URL: https://issues.apache.org/jira/browse/YARN-402
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Lohit Vijayarenu
> Priority: Minor
>
> AsyncDispatcher throws out Warn when capacity remaining is less than 1000
> {noformat}
> if (remCapacity < 1000) {
> LOG.warn("Very low remaining capacity in the event-queue: "
> + remCapacity);
> }
> {noformat}
> What would be useful is to warn much before that, may be half full instead of
> when queue is completely full. I see that eventQueue capacity is int value.
> So, if one warn's queue has only 1000 capacity left, then service definitely
> has serious problem.
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