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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