Arun Suresh created YARN-6406:
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Summary: Garbage Collect unused SchedulerRequestKeys
Key: YARN-6406
URL: https://issues.apache.org/jira/browse/YARN-6406
Project: Hadoop YARN
Issue Type: Improvement
Reporter: Arun Suresh
Assignee: Arun Suresh
YARN-5540 introduced some optimizations to remove satisfied SchedulerKeys from
the AppScheduleingInfo. It looks like after YARN-6040, ScedulerRequestKeys are
removed only if the Application sends a 0 numContainers requests. While
earlier, the outstanding schedulerKeys were also remove as soon as a container
is allocated as well.
An additional optimization we were hoping to include is to remove the
ResourceRequests itself once the numContainers == 0, since we see in our
clusters that the RM heap space consumption increases drastically due to a
large number of ResourceRequests with 0 num containers.
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