Hi.

i have got a problem solving the following szenario.

1. I have two MQs with delivery mode "exactly once"
2. I have multiple listeners requesting messages for processing from MQ A
3. Listeners do long running tasks with these messages (eg. 5 secs)
4. after processing a message it will be delivered to MQ B

These thinks works perfectly well without transactions.

BUT. 

I must go shure that each messages are processed correctly. so i added transactions to 
this scenario. then it is possible that multiple listener resolve a given message. --> 
delivery mode "exactly once" is violated.

can anybody help?

Thanks.

Georg

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