woowahan-jaehoon commented on issue #3404: [ZEPPELIN-4235] Pass environment 
variables for pyspark with impersonate.
URL: https://github.com/apache/zeppelin/pull/3404#issuecomment-511130850
 
 
   > I thought source to inherent the environment from the current one?
   
   @felixcheung, Sorry but I didn't understand your question.
   
   Without `PYTHONPATH` in `zeppelin-env.sh` and before this patch, 
   pyspark can run without impersonate setting but with impersonate, pyspark 
cannot run.
   
   Because PYTHONPATH is made by `interpreter.sh`
   but when impersonate is on, PYTHONPATH wasn't exist each system account so 
spark-submit cann't use `PYTHONPATH`.
   
   `ZEPPELIN_HOME` also be not passed. but I think that it can be important 
information for something because it is base path.

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