jin xing created SPARK-23524:
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Summary: Big local shuffle blocks should not be checked for
corruption.
Key: SPARK-23524
URL: https://issues.apache.org/jira/browse/SPARK-23524
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.2.1
Reporter: jin xing
In current code, all local blocks will be checked for corruption no matter it's
big or not. The reasons are as below:
# Size in FetchResult for local block is set to be 0
([https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala#L327)]
# SPARK-4105 meant to only check the small blocks(size<maxBytesInFlight/3),
but for reason 1, below check will be invalid.
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala#L420
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