Java.lang.IncompatibleClassChangeError by using AXIS in SAP NW

Question

Hi all,
I wrote a web programm using AXIS 1.2. I have no problem to deploy the EAR onto NW AS and can deploy a service onto this web application. But as I try to call the service I got exception´as follow. Someone has idea?
I am sure one or some of the jar files used in the programm are not compatible with that of SAP. But which one?
My web application runs no problem by Tomcat.
#1.5 #000C297AEFDA00650000002C00000A9000044155A603AAAD#1197736054125#System.err#sap.com/myAxisEar#System.err#Guest#0####a3e9b1d0ab2a11dca861000c297aefda#SAPEngine_Application_Thread[impl:3]_30##0#0#Error##Plain###15.12.2007 17:27:34 org.apache.axis.transport.http.AxisServlet logException
INFO: Exception:
java.lang.IncompatibleClassChangeError
     at org.apache.axis.message.MessageElement.addTextNode(MessageElement.java:1387)
     at org.apache.axis.message.SOAPHandler.addTextNode(SOAPHandler.java:148)
     at org.apache.axis.message.SOAPHandler.endElement(SOAPHandler.java:112)
     at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
     at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1712)
     at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
     at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
     at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
     at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
     at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
     at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
     at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:667)
     at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
     at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
     at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
     at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227)
     at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
     at org.apache.axis.Message.getSOAPEnvelope(Message.java:424)
     at org.apache.axis.server.AxisServer.initSOAPConstants(AxisServer.java:345)
     at org.apache.axis.server.AxisServer.invoke(AxisServer.java:279)
     at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)
Message was edited by:
        Thomas Roland

Answer 1

Folowing is the code. The exception comes from the code inside try:
org.apache.axis.client.Call _call = super._createCall();
try{
    java.lang.Object _resp = _call.invoke(new java.lang.Object[] {in0, in1});
I am not sure if the class version of "org.apache.axis.client.Call" not compatible. MAybe the axis use another class an dthis is not compatible with that in SAP.
Sounds quite difficult to figure it out.