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From "feiwang (Jira)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-29302) dynamic partition overwrite with speculation enabled
Date Tue, 01 Oct 2019 02:25:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-29302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16941472#comment-16941472
] 

feiwang commented on SPARK-29302:
---------------------------------

For dynamic partition overwrite, when execute a task, a determinable path would be specified.

In the reproduce suite above, I create two task attempt context with same task id and different
attempt id.
And specify a output dir for   newTaskTempFile method.

> 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
>
> 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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