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Posted to issues@spark.apache.org by "jin xing (JIRA)" <ji...@apache.org> on 2018/02/27 09:56:00 UTC

[jira] [Created] (SPARK-23524) Big local shuffle blocks should not be checked for corruption.

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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