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https://issues.apache.org/jira/browse/MAPREDUCE-540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matei Zaharia resolved MAPREDUCE-540.
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Resolution: Fixed
Assignee: Matei Zaharia
Alright, closing the JIRA because it is resolved in MAPREDUCE-551.
> Upate thread in FairScheduler runs too frequently
> -------------------------------------------------
>
> Key: MAPREDUCE-540
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-540
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Vinod K V
> Assignee: Matei Zaharia
>
> The UpdateThread in FairScheduler runs every 500ms (hardcoded). This proves
> to be very costly when running large clusters. UpdateThread tries to acquire
> lock on JT object every that often and so seriously affects HeartBeat
> processing besides everything else. The update interval should be a function
> of the cluster size. Or in the minimum it should be configurable and by
> default should be set to a reasonably high default value.
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