I have a simple service which is accepting HTTP/POST request and giving xml in the response. I have only one Web Services(soap) data protocol filter at HTTP listen step. When I unit test this service , its giving me proper response but during the performance/load Testing , response time of the service is increasing considerably and I am getting " ERROR System.err - [Fatal Error] :1:1: Content is not allowed in prolog." this error in the Vse.log.
Please help to suggest what can be the issue.