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https://issues.apache.org/jira/browse/SPARK-23708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16401673#comment-16401673
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Apache Spark commented on SPARK-23708:
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User 'caneGuy' has created a pull request for this issue:
https://github.com/apache/spark/pull/20845
> Comment of ShutdownHookManager.addShutdownHook is error
> -------------------------------------------------------
>
> Key: SPARK-23708
> URL: https://issues.apache.org/jira/browse/SPARK-23708
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: zhoukang
> Priority: Minor
>
> Comment below is not right!
> {code:java}
> /**
> * Adds a shutdown hook with the given priority. Hooks with lower priority
> values run
> * first.
> *
> * @param hook The code to run during shutdown.
> * @return A handle that can be used to unregister the shutdown hook.
> */
> def addShutdownHook(priority: Int)(hook: () => Unit): AnyRef = {
> shutdownHooks.add(priority, hook)
> }
> {code}
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