Github user berngp commented on the pull request:
https://github.com/apache/spark/pull/116#issuecomment-37884923
@aarondav just let me know what makes sense and I'll do it. Also please
consider the usage of an _extended_ `-X` option set, following the convention
that the JVM uses. e.g. `java -X` will display the extended arguments the JVM
supports.
Another point to discuss is the precedence of all these arguments.
Currently `spark-class` will source `conf/spark-env.sh` which will override
values set through the optional arguments that this change suggests.
Some changes that I have not submitted for review but might be worth
mentioning:
```
--java-home : The path to the java home, else it will use
JAVA_HOME.
--jvm-debug : The port that the JVM debugger will bind to. By
default the debugger is disabled.
```
The `--jvm-debug` might be useful if you are developing and running Spark
Shell with a `"local"` master.
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