Github user davies commented on the pull request:
https://github.com/apache/spark/pull/3709#issuecomment-67118160
@maropu Thank you for work in this. I'm just wondering what's the user case
that his argument will be useful? Because progress bar is disabled if logging
level is DEBUG or INFO.
This is useful when you have customized log4j configs, such as having
default logger level as WARNING, but having INFO/DEBUG in some components. In
these cases, the command line arguments will work better than put
`spark.ui.showConsoleProgress = false` in spark-default.conf?
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