Davies Liu created SPARK-3762:
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Summary: 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
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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