We are using JBoss 4.2.3GA, java 1.6.0_07 on RedHat5 64-bit. We've developed several stateless web services, communicating with JMS and everything is running fine as long as we do not send too many requests at one time. If we start sending 8-10 messages to the same web service simultaneously we get a SAXParseException: -1:-1: Premature End Of File. Basically, the SOAP message seems to be get screwed up, but on the sending side, the message (we print it) is correct. I cannot find any clues to why we get this message only when we start to send messages faster. Does anyone have any ideas about this?