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https://issues.apache.org/jira/browse/SPARK-20886?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-20886:
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Assignee: Steve Loughran
This was fixed in a way to allow {{null}} case.
> HadoopMapReduceCommitProtocol to fail with message if
> FileOutputCommitter.getWorkPath==null
> -------------------------------------------------------------------------------------------
>
> Key: SPARK-20886
> URL: https://issues.apache.org/jira/browse/SPARK-20886
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Trivial
> Fix For: 2.3.0
>
>
> This is minor, and the root cause is my fault *elsewhere*, but its the patch
> I used to track down the problem.
> If {{HadoopMapReduceCommitProtocol}} has a {{FileOutputCommitter}} for
> committing things, and *somehow* that's been configured with a
> {{JobAttemptContext}}, not a {{TaskAttemptContext}}, then the committer NPEs.
> A {{require()}} statement can validate the working path and so point the
> blame at whoever's code is confused.
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