Messages piling up in internal SCA queue point   

Hi..

We have request / response scenario to retrive product details from an application as part of our interface requirement. To cater to this requirement we have developed a mediation flow that sends the request message to the application using MQ Import. This is done using Service Invoke primitive from the mediation flow. The call being made is of type Asynchronous with Deferred Response. Timeout for the request is being set to 45s. Application sends the reply to a different queue that is configured in the MQ Import as Receive Queue property.

The interface is working fine normally. When there is a delayed response, the request timesout and the mediation flow processing goes to the timeout terminal of Service Invoke, which is also fine.

If a response is sent even after the timeout, it gets picked up by the MQ listener from the MQ queue and is placed in the WPS internal SCA queue (used for asynchronous communication) for processing by the mediation flow.
But since the request has timed out, there are no threads in the mediaton flow processing the corresponding response. Hence as a result the message continue to lie in that queue until we manually clear the queue.

Is there any way to prevent piling up of messages in this internal SCA queue, if the request has timed out? Some sort of settig like Expiry etc. I have also tried using the Asynchronous Response Expiration qualifier on the Reference partner of mediation flow, but no success.

It would be great if anyonce can help me out.

Thanks
Yuva