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https://issues.apache.org/jira/browse/SPARK-29302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949229#comment-16949229
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feiwang edited comment on SPARK-29302 at 10/11/19 7:46 AM:
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[~dangdangdang]
Hi, I have thought a simple solution.
We just need make the file name of a task be unique.
And the OutputCommitCoordinator would decide which task file can be committed.
But I don't have an appropriate unit test.
was (Author: hzfeiwang):
[~dangdangdang]
Hi, I have thought a simple solution.
We just need make the file name of a task be unique.
And the OutputCommitCoordinator would decide which task file can be committed.
But I don't have a appropriate unit test.
> dynamic partition overwrite with speculation enabled
> ----------------------------------------------------
>
> Key: SPARK-29302
> URL: https://issues.apache.org/jira/browse/SPARK-29302
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.4
> Reporter: feiwang
> Priority: Major
> Attachments: screenshot-1.png, screenshot-2.png
>
>
> Now, for a dynamic partition overwrite operation, the filename of a task
> output is determinable.
> So, if speculation is enabled, would a task conflict with its relative
> speculation task?
> Would the two tasks concurrent write a same file?
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