Github user felixcheung commented on the issue:
https://github.com/apache/zeppelin/pull/2480
I realize 2.10 is EOL but as mentioned, from a while back many platforms
are still running only on 2.10. Even Spark still supports 2.10 as of the latest
release 2.2.0 from yesterday. The reason is many enterprises have applications
that cannot be easily migrated to 2.11.
It is possible that some users are only using a small number of
interpreters (as you do) and they need a particular scala version. So instead
of forcing all submodule to always use the same scala version, how about set a
global scala version as the default but each submodule still has its own
spark.scala.version that can be set in the maven command line when building?
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