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https://issues.apache.org/jira/browse/SPARK-18751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15726963#comment-15726963
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Apache Spark commented on SPARK-18751:
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User 'zsxwing' has created a pull request for this issue:
https://github.com/apache/spark/pull/16178
> Deadlock when SparkContext.stop is called in Utils.tryOrStopSparkContext
> ------------------------------------------------------------------------
>
> Key: SPARK-18751
> URL: https://issues.apache.org/jira/browse/SPARK-18751
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.6.3, 2.0.2
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
>
> When SparkContext.stop is called in Utils.tryOrStopSparkContext (the
> following three places), it will cause deadlock because the stop method needs
> to wait for the thread running stop to exit.
> - ContextCleaner.keepCleaning
> - LiveListenerBus.listenerThread.run
> - TaskSchedulerImpl.start
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