I spoted it in version 4.1.1 I'm not sure if call it a bug but: When the computer which sends the message has non standart characters like ą ł ę in the name (windows computer name, I did not test it on Linux) activemq receives the report stores in oracle database - jdbc persistance only - with msgid_prod having wrong character inside the value which causes problems and the activemq is blocked, LocalTransaction - POST COMMIT FAILED: java.lang.RuntimeException: java.io.IOException: Failed to broker message: "id of the broker" in container: java.io.UTFDataFormatException: bad string -- View this message in context: http://www.nabble.com/activmq-persistence---serious-problem-with-msgid_prod-values-tf4593437s2354.html#a13113195 Sent from the ActiveMQ - User mailing list archive at Nabble.com.