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https://issues.apache.org/jira/browse/SPARK-23524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-23524:
-----------------------------------
Assignee: jin xing
> 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
> Assignee: jin xing
> Priority: Major
> Fix For: 2.3.1, 2.4.0
>
>
> 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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