There appears to be a thread leak in the uima-as jms listener. When running extended tests, the number of threads seem to increase over time. It looks like Executor plugged in into Spring Listener is not being shutdown sometimes leaving its thread(s) running.
The listener threads run as daemon threads so on jvm exit they are shutdown. So this leak may only effect applications that deploy/undeploy collocated (same jvm) UIMA-AS services.