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From "feiwang (Jira)" <j...@apache.org>
Subject [jira] [Comment Edited] (SPARK-29302) dynamic partition overwrite with speculation enabled
Date Wed, 09 Oct 2019 08:31:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-29302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16947446#comment-16947446
] 

feiwang edited comment on SPARK-29302 at 10/9/19 8:30 AM:
----------------------------------------------------------

Sorry, I was on my National Day holiday for the past eight days. 
I just made a simple jobId in the UT above.
In fact, it was created by a jobIdInstant.
And for  the tasks of a same job, they are same.
So, I think this is still an issue.
 !screenshot-1.png! 
 !screenshot-2.png! 




was (Author: hzfeiwang):
Sorry, I was on my National Day holiday for the past eight days. 
I just made a simple jobId in the UT below.
In fact, it was created by a jobIdInstant.
And for  the tasks of a same job, they are same.
So, I think this is still an issue.
 !screenshot-1.png! 
 !screenshot-2.png! 



> 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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