Log4J - Downsides?

["Paul Rogers" <ironstack2000@hotmail.com>]

Going to pitch using log4j to my company next week.
I've tried it out within some of the existing code and seems to be great.

However, has anyone seen any problems using this API?
Things like performance issues, security...

This will used with servlets, and other backend code, running on JRun 2.3.2


My company is open-source unfriendly to start with, so it will be an uphill 
fight..

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