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https://issues.apache.org/jira/browse/SPARK-36187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-36187.
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Resolution: Incomplete
> Commit collision avoidance in dynamicPartitionOverwrite for non-Parquet
> formats
> -------------------------------------------------------------------------------
>
> Key: SPARK-36187
> URL: https://issues.apache.org/jira/browse/SPARK-36187
> Project: Spark
> Issue Type: Question
> Components: SQL
> Affects Versions: 3.1.2
> Reporter: Tony Zhang
> Priority: Minor
>
> Hi, my question here is specifically about [PR
> #29000|https://github.com/apache/spark/pull/29000/files#r649580767] for
> SPARK-29302.
> To my understanding, the PR is to introduce a different staging directory at
> job commit to avoid commit collision. In SQLHadoopMapReduceCommitProtocol,
> the new staging directory is only set when SQLConf.OUTPUT_COMMITTER_CLASS is
> not null:
> [code|https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/SQLHadoopMapReduceCommitProtocol.scala#L58],
> and in current Spark repo, OUTPUT_COMMITTER_CLASS seems set only for parquet
> formats:
> [code|https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFileFormat.scala#L96].
> However I didn't find similar behavior in Orc related code to set that
> config. If I understand it correctly, without setting
> SQLConf.OUTPUT_COMMITTER_CLASS properly (like for Orc format),
> SQLHadoopMapReduceCommitProtocol will still use the original staging
> directory, which may void the fix by the PR, in which case the commit
> collision may still happen, thus the fix is now only effective for Parquet,
> but not for non-Parquet files.
> Could someone confirm if it is a potential problem, or not? Thanks!
> [~duripeng] [~dagrawal3409]
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