Upate thread in FairScheduler runs too frequently
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Key: HADOOP-5185
URL: https://issues.apache.org/jira/browse/HADOOP-5185
Project: Hadoop Core
Issue Type: Bug
Components: contrib/fair-share
Reporter: Vinod K V
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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