Andrew Or created SPARK-6133:
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             Summary: SparkContext#stop is not idempotent
                 Key: SPARK-6133
                 URL: https://issues.apache.org/jira/browse/SPARK-6133
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 1.0.0
            Reporter: Andrew Or
            Assignee: Andrew Or


If we call sc.stop() twice, the listener bus will attempt to log an event after 
stop() is called, resulting in a scary error message. This happens if Spark 
calls sc.stop() internally (it does this on certain error conditions) and the 
application code calls it again, for instance.



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