MQSeries.net :: View topic - Urgent -Plz Help : Msg flow Design (using Aggregation nodes)

MM_MQ_devp · Posted: Tue Dec 06, 2005 10:02 am Post subject:

Hi Ppl,

I am a newbie and i have very recently started using the MQ product stack ( MQ Series, MQ Broker, MQ Workflow ).

In one of the learning exercises, i was asked to create a central broker instance which will send messages to clients which are located in diff parts of the world by putting it on a MQ Q. The client will then transform these msgs and put them on a diff MQ Q. The Broker will then recieve transformed msgs from these clients. The aggregate msg flow puts the message on queue which is an i/p queue for another subflow. This subflow does the work of a request / response and interacts with the client.

I just have to send the same msg to all the clients without any need for splitting the message or extracting any details , but i need to measure the time it takes for the message to reach the client and return back to the broker. I also need to set a time out , after which the broker will not wait for any more msgs to come.

I am using Aggregate nodes for this task. I basically have 3 to 5 clients to
which i have to send the msg.

I am getting a problem before my request / response subflow. The msg is put on the queue for only 2 of the parallel msg flows after which an exception is thrown.

I am getting an exception "Message Id is not unique" after just 2 of the parallel msg flows are processed. I checked the msg id and it is the same in both the parallel flows. I traced the flow using the flow debugger.

I also checked out the Airline sample , which is working fine although the same msg id is generated in both the parallel flows.

My question is

Is it ok to use Aggregate nodes for this requirement ?

If so, then how do i resolve this "Message Id is not unique" exception ?

Please reply at the earliest.

Thanks & Regards,

Mat