I ran into a NoSuchMethodError when I incorporated a dependency which called the log4j LogManager.getLoggerRepository directly. I managed to solve it's absence by creating my own implementation of the LogManager class with a NOP getLoggerRepository method.

In bug report 202 the absence of this method was also noted, but deemed invalid.
Might I ask why this method will not be included in the bridge? Other NOP methods have been included so why not this one?