Github user herval commented on the issue:

    https://github.com/apache/zeppelin/pull/2480
  
    sounds good, I’ll do that then
    
    _____________________________
    From: Felix Cheung 
<notificati...@github.com<mailto:notificati...@github.com>>
    Sent: Wednesday, July 12, 2017 9:34 AM
    Subject: Re: [apache/zeppelin] [ZEPPELIN-1249] build all submodules w/ the 
same scala version (#2480)
    To: apache/zeppelin 
<zeppe...@noreply.github.com<mailto:zeppe...@noreply.github.com>>
    Cc: Herval Freire <hervalfre...@gmail.com<mailto:hervalfre...@gmail.com>>, 
Author <aut...@noreply.github.com<mailto:aut...@noreply.github.com>>
    
    
    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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