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https://issues.apache.org/jira/browse/SPARK-6616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-6616.
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Resolution: Not A Problem
I think this was obsoleted by subsequent changes that made this more
thread-safe.
> IsStopped set to true in before stop() is complete.
> ---------------------------------------------------
>
> Key: SPARK-6616
> URL: https://issues.apache.org/jira/browse/SPARK-6616
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.3.0
> Reporter: Ilya Ganelin
>
> There are numerous instances throughout the code base of the following:
> {code}
> if (!stopped) {
> stopped = true
> ...
> }
> {code}
> In general, this is bad practice since it can cause an incomplete cleanup if
> there is an error during shutdown and not all code executes. Incomplete
> cleanup is harder to track down than a double cleanup that triggers some
> error. I propose fixing this throughout the code, starting with the cleanup
> sequence with {code}SparkContext.stop() {code}
> A cursory examination reveals this in {code}SparkContext.stop(),
> SparkEnv.stop(), and ContextCleaner.stop() {code}
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