[jira] [Created] (SPARK-21175) Slow down "open blocks" on shuffle service when memory shortage to avoid OOM.

["jin xing (JIRA)" <ji...@apache.org>]

jin xing created SPARK-21175:
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             Summary: Slow down "open blocks" on shuffle service when memory shortage to avoid OOM.
                 Key: SPARK-21175
                 URL: https://issues.apache.org/jira/browse/SPARK-21175
             Project: Spark
          Issue Type: Improvement
          Components: Shuffle
    Affects Versions: 2.1.1
            Reporter: jin xing


A shuffle service can serves blocks from multiple apps/tasks. Thus the shuffle service can suffers high memory usage when lots of {{shuffle-read}} happen at the same time. In my cluster, OOM always happens on shuffle service. Analyzing heap dump, memory cost by Netty(chunks) can be up to 2~3G. It might make sense to reject "open blocks" request when memory usage is high on shuffle service.



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