Github user zsxwing commented on the pull request:

    https://github.com/apache/spark/pull/5130#issuecomment-85010591
  
    > @zsxwing Can you clarify this? Are you running something that never 
starts SparkContext? I'm not sure what you mean by the user doesn't create 
spark context but the driver exits normally.
    
    E.g., my application may check some folders at first. If they exist, it 
will create `SparkContext` and run some jobs. If not, it just exits because the 
data is not ready.


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