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From "feiwang (Jira)" <>
Subject [jira] [Commented] (SPARK-29302) dynamic partition overwrite with speculation enabled
Date Wed, 09 Oct 2019 08:30:00 GMT


feiwang commented on SPARK-29302:

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.

> dynamic partition overwrite with speculation enabled
> ----------------------------------------------------
>                 Key: SPARK-29302
>                 URL:
>             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
> Would the two tasks concurrent write a same file?

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