WebSphere WebSphere Application Server Express, Version 6.0.x Operating Systems: AIX, HP-UX, Linux, Solaris, Windows

Investigating why publish/subscribe messages are not arriving at a subscription

This topic describes how to investigate why publish/subscribe messages are not arriving at a subscription on a service integration bus.

Why and when to perform this task

Use this topic if you have an application that is producing messages to a topic space destination, and a consuming application is not receiving the messages.

Perform the following preliminary checks before starting the investigation:

Steps for this task

  1. Click Service integration -> Buses -> bus_name -> [Destination resources] Destinations to display the destinations on the relevant bus. Click on the relevant topic space and under Message points, click Publication points. For each publication point listed, click the publication point then click [Runtime] Subscriptions and look for your subscription. If your subscription is not listed on any of the publication points, there is an error in the consuming application.
  2. Determine which messaging engines the producing and consuming applications are connected to, see Determining which messaging engine an application is connected to.
  3. If the producing application is connected to the same messaging engine as the consuming application, the messages are being produced locally to the consumer. Recheck the producing and consuming applications, and check the system logs for errors.
  4. [Version 6.0.2]If the producing application is connected to a different messaging engine than the consuming application, the messages are being routed via a remote publication point. Refer to Investigating why publish/subscribe messages are not being received by a subscription via a remote message point to investigate this scenario.

Task topic

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Last updated: 2 Aug 2005
http://publib.boulder.ibm.com/infocenter/ws60help/index.jsp?topic=/com.ibm.websphere.pmc.express.doc\tasks\tju_pubsub_nd.html

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