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Posted to issues@spark.apache.org by "Mridul Muralidharan (Jira)" <ji...@apache.org> on 2021/08/02 15:07:00 UTC
[jira] [Commented] (SPARK-35275) Add checksum for shuffle blocks
[ https://issues.apache.org/jira/browse/SPARK-35275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17391640#comment-17391640 ]
Mridul Muralidharan commented on SPARK-35275:
---------------------------------------------
Do we want to add a documentation task for this jira as well [~Ngone51] ?
> Add checksum for shuffle blocks
> -------------------------------
>
> Key: SPARK-35275
> URL: https://issues.apache.org/jira/browse/SPARK-35275
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 3.2.0
> Reporter: wuyi
> Priority: Major
>
> Shuffle data corruption is a long-standing issue in Spark. For example, in SPARK-18105, people continually reports corruption issue. However, data corruption is difficult to reproduce in most cases and even harder to tell the root cause. We don't know if it's a Spark issue or not. With the checksum support for the shuffle, Spark itself can at least distinguish the cause between disk and network, which is very important for users.
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