HTTP time out Error in BPM.....

Question

Hi
Error Description:
We have created a Sync-Async Bridge BPM scenario in XI.
In the BPM scenario we are calling the web service, and if the response from the web service is an error message then we have retry in a loop up to 24 times after wait for every 1 min.
We are sending the data to the web service using a proxy created in the R/3 system.
We are getting the time out error in the R/3 system. 
We have changed the following parameters in XI.
In SXMB_ADM of XI we have set the value for the following parameter.
Category                      parameter                                                                    current value
SA_COMM                    CHECK_FOR_ASYNC_RESPONSE_TIMEOUT                120
In SXMB_ADM of R/3 we have set the value for the following parameter.
Category                      parameter                                                                    current value
RUNTIME                      HTTP_TIMEOUT                                                            120
When we put the value as 120 for the above parameters and we try for 2 times in the BPM process, then it is sending the response back to the R/3 system after completing the whole BPM process.
But when we increase the no of retries in the BPM process then it is not sending the response back to the R/3 system in the same way, at that time we are getting the error in SXMB_MONI of R/3 system as given below.
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
-   <!--
    Inbound Message
  -->
- <SAP:ErrorHeader xmlns:SAP="http://sap.com/exchange/MessageFormat">
  <SAP:Context />
  <SAP:Code p1="500" p2="Timeout" p3="" p4="">HTTP.HTTP_STATUS_CODE_NEQ_OK</SAP:Code>
  <SAP:Text language="EN">HTTP status code 500 : Timeout</SAP:Text>
  </SAP:ErrorHeader>
Please provide the solution for the same.
Many Thanks
Rinku Gangwani

Answer 1

Hi Prateek,
Thanks for your replay. I am able to open the URL from XI/PI.
I tried by testing the same URL by using XI 3.0, its working fine and i am getting required data, but in PI 7.1 i am getting an error.
Error is:
In MONI:
com.sap.engine.interfaces.messaging.api.exception.MessagingException: java.net.ConnectException: Connection refused: connect
In RWB:
Message processing failed. Cause: com.sap.engine.interfaces.messaging.api.exception.MessagingException: java.net.ConnectException: Connection timed out: connect
What could be the reason?
Regards,
Venu