tested on a secure deploy namenode and jobtracker both have the security logs working.
Did you do this test on trunk? Or only on branch-0.20-security?
On trunk, running a client command (built from source checkout) now results in this:
$ hadoop fs -ls /
log4j:ERROR Could not find value for key log4j.appender.NullAppender
log4j:ERROR Could not instantiate appender named "NullAppender".
Reverting this patch fixes the issue. Could someone please look into this?