Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/332#issuecomment-39655093
Scala logging is not a new logger. This is just a set of macro functions
that call sfl4j, wrapping the logging calls in checks to see if they are
enabled. This lets you perform logging without the performance overhead of
doing string concatenation when the log doesn't, allocating a closure (like
current spark logging does), or having to manually write out the if checks
yourself.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
