No bang in the head needed
This is working as (currently) designed.
In dm Server 1.0, dm Server's code is weaved with an aspect that makes the method name and line number for a trace call available in a way that is very inexpensive. When a 'normal' tracing API is used this information isn't available, and determining it is very expensive as it requires taking a snapshot of the thread's stack. As a result of this expense, dm Server opts to track unknown for the method name.
This is an area that we will improve in dm Server 2.0. We plan to replace dm Server's tracing support with a LogBack-based implementation. This will make all of the power of LogBack available to your applications, e.g. you'll be able to configure an appender with a pattern that includes the method name if you so chose.
Andy Wilkinson
SpringSource