Can't run built-in spark w/o JDK8 in recent snapshot

[Park Hoon]

Hi @dev,


Can't run built-in spark in Zeppelin without JDK8 in the most recent
snapshot. Currently, we have 2 options.

- run zeppelin with java 8
- or set `JAVA_HOME` (JDK8) in spark interpreter setting as @zjffdu
suggested in https://github.com/apache/zeppelin/pull/2486

It gonna be a problem in the released bin.


Any ideas?

Regard,