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  1. Hadoop YARN
  2. YARN-3091

[Umbrella] Improve and fix locks of RM scheduler

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      Description

      In existing YARN RM scheduler, there're some issues of using locks. For example:

      • Many unnecessary synchronized locks, we have seen several cases recently that too frequent access of scheduler makes scheduler hang. Which could be addressed by using read/write lock. Components include scheduler, CS queues, apps
      • Some fields not properly locked (Like clusterResource)

      We can address them together in this ticket.

      (More details see comments below)

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              • Assignee:
                Unassigned
                Reporter:
                leftnoteasy Wangda Tan
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                • Created:
                  Updated: