All the MQ Everyplace® trace points use negative trace point numbers. They are provided to facilitate problem diagnosis for the IBM® Service team, when investigating a reported problem on the MQ Everyplace product.
Each trace point can change its meaning, value, and sequential position between versions of the MQ Everyplace classes. A trace point used in one version of MQ Everyplace might never be issued in another. For this reason, we strongly recommend that in your applications you do not use a trace point as a trigger for application logic.
When rendering trace point information to a readable format, maintain a consistent version between all the MQ Everyplace classes. Failure to do so might result in misleading information being written to the trace output.
Parent topic: Tracing and logging: XPD622