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Posted to yarn-issues@hadoop.apache.org by "Wangda Tan (JIRA)" <ji...@apache.org> on 2015/01/23 00:03:34 UTC

[jira] [Created] (YARN-3091) [Umbrella] Improve locks of RM scheduler

Wangda Tan created YARN-3091:
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             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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