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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3091) [Umbrella] Improve locks of RM scheduler
Date Thu, 22 Jan 2015 23:03:34 GMT
Wangda Tan created YARN-3091:
--------------------------------

             Summary: [Umbrella] Improve locks of RM scheduler
                 Key: YARN-3091
                 URL: https://issues.apache.org/jira/browse/YARN-3091
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: capacityscheduler, fairscheduler, resourcemanager, scheduler
            Reporter: Wangda Tan


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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