Marcelo Vanzin commented on HIVE-15302:

bq. For #2, I think we still need SPARK_HOME unless we clone a simplified spark 
installation in Hive directory structure, which is not ideal.

You can create your own command line to run the SparkSubmit class with the 
correct classpath and command line arguments. That's basically all that the 
spark-submit script does anyway. Since HoS's use case is a lot simpler, it 
shouldn't be hard to do (you don't need to support all the different 
combinations or arguments that the spark-submit script handles).

> Relax the requirement that HoS needs Spark built w/o Hive
> ---------------------------------------------------------
>                 Key: HIVE-15302
>                 URL: https://issues.apache.org/jira/browse/HIVE-15302
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Rui Li
>            Assignee: Rui Li
> This requirement becomes more and more unacceptable as SparkSQL becomes 
> widely adopted. Let's use this JIRA to find out how we can relax the 
> limitation.

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