Deploy the following webservice: @WebService public class SubmitOrder { public SubmitOrder() { // TODO Auto-generated constructor stub } /** Note: when adding parameters to the method, please remember to add them into WSDL file (see wsdlLocation above), under the 'submitOrder' complext type! Note2: IF yo modify the endpoint methods, you MUST restart wildfly in order for the changes to take effect. If you do not restart, it may hot deploy OK, but the code will still be the old one until a wildfly restart is performed. @param opId @param generator @param originAlias @param grpId @param dad @param serviceName @param serviceClass @param transId @return */ @WebMethod public Long submitOrder(@WebParam(name = "opId") String opId, @WebParam(name = "generator") String generator, @WebParam(name = "originAlias") String originAlias, @WebParam(name = "grpId") String grpId, @WebParam(name = "dad") String dad, @WebParam(name = "serviceName") String serviceName ,@WebParam(name = "transId") String transId ,@WebParam(name = "paramsMap") Map<String, Object> paramsMap ,@WebParam(name = "expiresAt") Date expiresAt ,@WebParam(name = "sync") Boolean sync ) throws Exception { System.out.println("Submitted order request received with transId: <" + transId + ">, opId: <" + opId + ">, ..."); return 0l; } } as a WAR project. Run a SOAP-UI load test calling the above webservice... usually after few minutes (<10/15) you observe the JVM crash. My last test was a load test with 10 threads for 900 seconds, and it failed after 1'250'000 requests. I've attached a WAR with teh