If no more worker is available to process a JBI message, the JBI acceptor displayed the following message: "Thread 'xxxx' unexpectedly stopped !" Instead of something like: "No more JBI worker available: " + e.getMessage() Moreover, all exception that is not an InterruptedException displays the following wrong message: "Thread 'xxxx' unexpectedly stopped !" that should be replaced by something like: "An unexpected exception occurs during the processing of the JBI acceptor 'xxxxx'" + the exception statck trace.