Lee moon soo created ZEPPELIN-1460:

             Summary: Make spark configuration less confusing and ambiguous, 
more intuitive
                 Key: ZEPPELIN-1460
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-1460
             Project: Zeppelin
          Issue Type: Improvement
    Affects Versions: 0.6.2
            Reporter: Lee moon soo
             Fix For: 0.7.0

Currently, Spark context in Spark interpreter takes properties from many 
different places.

- Interpreter setting page on Zeppelin GUI
- Environment variable in conf/zeppelin-env.sh
- Through --conf of SPARK_SUBMIT_OPTIONS in conf/zeppelin-env.sh
- SPARK_HOME/conf/spark-defaults.conf

There're some problems

a) It's not clearly documented which way overrides the other
b) Difficult to configure all properties of Spark Interpreter programmatically
c) Difficult to see effective configuration value which combines all 
configurations in 4 different places above.

I think a) and b) can be resolved by writing document that describes how 
configurations are applied and guide how to configure spark interpreter without 
accessing GUI.

c) Many users expect to show interpreter setting GUI shows all effective 
configuration values. not only the values that interpreter.json overrides. But 
it can not be done without changing interpreter architecture, i think.
We need some good ideas for c).

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