Hi Praveen,
That means each Synchronous/Asynchornous Message would have its own "http://DCUsage.com"?
Suppose 1st message comes and get stuck, in between 2nd message completes its Request and Response, but there should not be any issue when 1st one tries to retrieve the value at Response flow because 1st Message has DCUsuage at some different place than 2nd Message DCUsuage. So 2nd Message could never access the DCUsuage place for 1st Message.
This scenario is difficult to replicate in DEV server.
Regards,
Nabendu.