Github user WangTaoTheTonic commented on the pull request:
https://github.com/apache/spark/pull/5202#issuecomment-86626534
I understand Sean says `This change makes log output mix with program
output.`
Perhaps log the spark message to System.err could not solve the mixed
problem either(like Pavel pointed), but the normal way is using a self-defined
log4j properties that can split user/spark/other output away using multiple
appenders.
So if it is not a big problem here, what about print stream used in
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala#L85
?
Is it a side-channel on purpose?
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