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Existing Application Performance Management (APM) tools, and emerging W3C standards for Distributed Tracing require propagation of tracking meta data across application protocols.
For applications using HTTP as the communication protocol between application components, this meta data can be placed in HTTP headers to be accessed by downstream APM agents or tracers while not fundamentally impacting the application being monitored.
For applications that use messaging protocols for communication between application components, the propagation of tracking meta data is typically handled by adding the meta data in message properties.
For IBM MQ based applications, the insertion of unexpected message properties can cause the underlying application to fail. While is it possible to change the application to handle these additional properties, it is often not technically or financially feasible to do so.
Ideally there would be a mechanism to propagate distributed tracing meta data across IBM MQ messages without requiring application or MQ configuration changes.
If a Java application is instrumented with an APM agent or tracer, the agent will place transaction tracing meta data in JMS message properties. If the target queue for this application is IBM MQ, these message properties can be converted to RFH2 headers. If the consumer of these messages is a traditional z/OS application performing an MQGET, the application is typically not expecting the presence of RFH2 headers after the MQMD. This will cause the application to fail.
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