Github user dilipbiswal commented on the pull request:
https://github.com/apache/spark/pull/9194#issuecomment-152000584
@marmbrus
Thank you very much for your comments. I did think about users having their
own log4j. My thinking was that - if they don't specify a console appender then
i would get a null when querying for it and so i would not attempt to remove
it. However, it is possible for them to write their own console appender and
give it their own alias. I was hoping that this would be a rare case ..
However i like your suggestion of logging it as DEBUG level. Its much
simpler and if users have set to log at this level then it is ok for them to
see this exception on the console (if they have selected a console appender). I
will make the change per your suggestion.
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