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https://issues.apache.org/jira/browse/SPARK-4424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15018612#comment-15018612
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Apache Spark commented on SPARK-4424:
-------------------------------------

User 'JoshRosen' has created a pull request for this issue:
https://github.com/apache/spark/pull/9865

> Clean up all SparkContexts in unit tests so that 
> spark.driver.allowMultipleContexts can be false
> ------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-4424
>                 URL: https://issues.apache.org/jira/browse/SPARK-4424
>             Project: Spark
>          Issue Type: Improvement
>          Components: Tests
>            Reporter: Josh Rosen
>            Assignee: Josh Rosen
>            Priority: Minor
>
> This is a followup JIRA to SPARK-4180 to make sure that we finish refactoring 
> the unit tests so that all SparkContexts are properly cleaned up; since the 
> current tests don't perform proper cleanup, we currently need to set 
> {{spark.driver.allowMultipleContexts=true}} in the test configuration.
> It may be best to do this as part of a larger refactoring / cleanup of our 
> test code to use cleaner test fixture patterns.



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