Mon Mar 15 23:13:37 end connection 127.0.0.1:60647
Mon Mar 15 23:13:23 auth: bad nonce received or getnonce not called. could be a driver bug or a security attack. db:test
Mon Mar 15 23:13:37 end connection 127.0.0.1:60648

Either the message is being triggered incorrectly, or it's a queued message that's being printed at the wrong time.