I have tried running a load test for 200 users. In the application, there was a third party call which led to a "java.net.SocketException: Connection Reset" error. But, there was no such errors on the server logs.
We found the following errors on the server logs
PegaCRM-Data-xxx-xxxxxxx.xxxxxx will restart in 180000 ms System-Queue-xxxx-xxxxxxxx.xxxxxxxx encountered an execution error. Restarting after delay. com.pega.pegarules.pub.context.prsecurityexception: Problems encountered when setting the access group for the queue activity
For the third party call transaction, the error in log read:
RemoteApplicationException : Soap Request failed ResourceUnavailableException : Soap Request failed
I am not sure about the root cause of the problem. It would be of a great help to know where to look at either from testing standpoint or at the networking end.