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https://issues.apache.org/jira/browse/SPARK-3762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14156159#comment-14156159
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Apache Spark commented on SPARK-3762:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/2624
> clear all SparkEnv references after stop
> ----------------------------------------
>
> Key: SPARK-3762
> URL: https://issues.apache.org/jira/browse/SPARK-3762
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Reporter: Davies Liu
> Assignee: Davies Liu
> Priority: Critical
>
> SparkEnv is cached in ThreadLocal object, so after stop and create a new
> SparkContext, old SparkEnv is still used by some threads, it will trigger
> many problems.
> We should clear all the references after stop a SparkEnv.
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