I am running a load test using SiPp server for around 1k calls, Out of that 10 to 15 calls are failing due to TransactionAlreadyExistsException. I have verified that sip CallId is also unique for each call. How to handle this error? Thanks
Transactions are about the Via branch id, not the call id. Make sure the Via branch id is unique. Make sure you are not using some kind of timestamp as a branch id for example because when you do it too fast the timestamp between attempts may come the same.