Use user trace for debugging your applications; you can trace integration nodes, integration servers, and deployed message flows. Stop user trace facilities by using the mqsichangetrace command.
mqsichangetrace IBNODE -u -e default -l none
where:-u specifies user trace
-e specifies the integration server (in this case, the default integration server)
-l specifies the level of trace (in this case, none)
F MQP1BRK,ct u=yes, e='default', l=none