[KYUUBI #3157][DOC] Modify logging doc due to using log4j2 instead of log4j
Why are the changes needed?
To close #3157
How was this patch tested?
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[ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
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[x] Add screenshots for manual tests if appropriate
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[ ] Run test locally before make a pull request
CC @yaooqinn
do we need a migration guide now? @pan3793 @turboFei @cfmcgrady
Apache Log4j provides a migration guide, we can add the link to doc. https://logging.apache.org/log4j/2.x/manual/migration.html
Apache Log4j provides a migration guide, we can add the link to doc. https://logging.apache.org/log4j/2.x/manual/migration.html
I suggest we have our own guide to mention log4j's, we may have some other API change now and in the future
Thanks, merging to master