Github user uncleGen commented on the issue:
https://github.com/apache/spark/pull/16573
@zsxwing I know what you mean, and indeed it can achieve the right result!
IMHO, since we have provided the `SparkContext.setLogLevel`, it is weird to
call `org.apache.log4j.Logger.getRootLogger().setLevel(l)`, but not use
`SparkContext.setLogLevel()`. Besides, the new adding conf is just an internal
conf. At last, the actual change is far from complicated.
Anyway, it is not a major issue, and can be fixed with your way, if you do
not like this PR, I will close it.
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