MQSeries.net :: View topic

jnoubi · Posted: Fri Nov 02, 2007 7:03 am Post subject:

I am working on an error handling strategy for our environment which uses MQ 6.0 for transport and MB 6.0 for routing and transformation.
One of the strategies is to roll back messages into the source system in case the link with the target system is down.

So basically, in case the link between the MB and the target system is down (for any reason such as channel down, network issues,..), my strategy is to roll back any messages to the source system's queue (no DLQ is specified for the queue manager of the message broker and retry count is set to 5 for example). This works well because I am ensuring that incoming messages will stay in sequence and the source system will be forced to stop sending once their queue is full.

However, the problem that I am facing is how to restart the process of MB picking up the messages from the incoming queue once the link to the target system is restored?

So basically, the recovery strategy is not clear. If I manually remove the first message from the incoming queue (for ex using rfhutil), the flow is restarted. However, because one of my requirements is not to lose any message and not to lose the order of the messages, I can't manually remove messages.

Any suggestions to restart the flow without any loss of messages or order?