We are using jOOQ for database access in the ReqBaz las2peer project (see under environment). We unfortunately had two versions of jOOQ on our classpath, namely 3.3.2 and 3.4.2. The build process didn't complain neither did las2peer during runtime, it just silently failed. Interestingly las2peer tried to execute the service twice; after the first go it outputted "Local access to service de.rwth.dbis.acis.bazaar.service.BazaarService failed - trying globally" without further stacktrace, on the second try it tried the same method again and then finally silently failed.
It's probably very hard to reproduce this error so feel free to step in my office so I can show you.