Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/1189
Thanks for contribution!
`ZEPPELIN_JAVA_OPTS` used to set JVM options both ZeppelinServer and
InterpreterProcess.
Later `ZEPPELIN_INTP_JAVA_OPTS` has been introduced. To keep compatibility
with previous configuration, `ZEPPELIN_INTP_JAVA_OPTS` designed to overrides
`ZEPPELIN_JAVA_OPTS` for InterpreterProcess.
So previous version of `conf/zeppelin-env.sh` can work without
modification.
That's why InterpreterProcess looks like implicitly uses
`ZEPPELIN_JAVA_OPTS`.
I don't have any preference of either keeping current behavior or change it.
But if you'd like to change, I think `ZEPPELIN_INTP_MEM` also need to be
changed, to make configuration consistent.
Also, this change makes `conf/zeppelin-env.sh` incompatible to previous
version. So i think it's great idea that guide user how `ZEPPELIN_JAVA_OPTS`
and `ZEPPELIN_INTP_JAVA_OPTS` are changed through
https://github.com/apache/zeppelin/blob/master/docs/install/upgrade.md.
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