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https://issues.apache.org/jira/browse/SPARK-29302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949190#comment-16949190
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Shimin Yang edited comment on SPARK-29302 at 10/11/19 10:41 AM:
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Hi all, I have also encountered this issue and have a fix still under test.
When we use the dynamic overwrite, we actually use same staging directory for
speculative tasks. Meanwhile, FileOutputComitter actually did nothing when
commit task.
was (Author: dangdangdang):
Hi all, I have also encountered this issue and have a fix still under test.
When we use the dynamic overwrite, we actually use same staging directory for
speculative tasks. Meanwhile, FileOutputComitter actually did nothing when
commit task.
May I assign this ticket to myself?
> 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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