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https://issues.apache.org/jira/browse/SPARK-29037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16929916#comment-16929916
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feiwang commented on SPARK-29037:
---------------------------------
[~advancedxy] Hi, I found that even with dynamicPartitionOverwrite, spark may
still give duplicate result for the case below.
And I have create a pull request.
https://github.com/apache/spark/pull/25795
Case:
Application appA insert overwrite table table_a with static partition overwrite.
But it was killed when committing tasks, because one task is hang.
And parts of its committed tasks output is kept under
/path/table_a/_temporary/0/.
Then we run application appB insert overwrite table table_a with dynamic
partition overwrite.
It executes successfully.
But it also commit the data under /path/table_a/_temporary/0/ to destination
dir.
> [Core] Spark gives duplicate result when an application was killed and rerun
> ----------------------------------------------------------------------------
>
> Key: SPARK-29037
> URL: https://issues.apache.org/jira/browse/SPARK-29037
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.1.0, 2.3.3
> Reporter: feiwang
> Priority: Major
> Attachments: screenshot-1.png
>
>
> When we insert overwrite a partition of table.
> For a stage, whose tasks commit output, a task saves output to a staging dir
> firstly, when this task complete, it will save output to committedTaskPath,
> when all tasks of this stage success, all task output under committedTaskPath
> will be moved to destination dir.
> However, when we kill an application, which is committing tasks' output,
> parts of tasks' results will be kept in committedTaskPath, which would not be
> cleared gracefully.
> Then we rerun this application and the new application will reuse this
> committedTaskPath dir.
> And when the task commit stage of new application success, all task output
> under this committedTaskPath, which contains parts of old application's task
> output , would be moved to destination dir and the result is duplicated.
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