vznet/play-mongo-jackson-mapper — pull request #7 by drei01 (2013-04-14 15:03:12+00:00)
Title: Use the correct class loader getting ObjectMapper

Based on the following bug report http://play.lighthouseapp.com/projects/82401-play-20/tickets/937-bug-urlclassloader

I have the same symptom using your module, my application will only run when using "play start", not "play run".