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From "Eric Chow" <eric...@gmail.com>
Subject [RPCMessageReceiver] Exception occurred while trying to invoke service
Date Sat, 24 Mar 2007 16:14:19 GMT
Hello,

Anyone can teach me what cause the following exception, and how to solve it?

Or if this is a bug in Axis-1.1.1

My Environment:
Axis2-1.1.1, Tomcat-5.5.23, Java 1.5.x
Invoking the web service from C#.



23:58:57,937 ERROR [RPCMessageReceiver] Exception occurred while
trying to invoke service method getAllUsersArray
org.apache.axiom.om.OMException: java.lang.NullPointerException
        at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:194)
        at org.apache.axiom.om.impl.llom.OMNodeImpl.build(OMNodeImpl.java:318)
        at org.apache.axiom.om.impl.llom.OMElementImpl.build(OMElementImpl.java:632)
        at org.apache.axiom.om.impl.llom.OMElementImpl.detach(OMElementImpl.java:599)
        at org.apache.axiom.om.impl.llom.OMNodeImpl.setParent(OMNodeImpl.java:117)
        at org.apache.axiom.om.impl.llom.OMElementImpl.addChild(OMElementImpl.java:249)
        at org.apache.axiom.om.impl.llom.OMElementImpl.addChild(OMElementImpl.java:202)
        at org.apache.axis2.rpc.receivers.RPCUtil.processResponse(RPCUtil.java:169)
        at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:136)
        at org.apache.axis2.receivers.AbstractInOutSyncMessageReceiver.receive(AbstractInOutSyncMessageReceiver.java:39)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:497)
        at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:328)
        at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:254)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NullPointerException
        at org.apache.axis2.databinding.utils.BeanUtil.getPullParser(BeanUtil.java:78)
        at org.apache.axis2.databinding.utils.reader.ADBXMLStreamReaderImpl.processProperties(ADBXMLStreamReaderImpl.java:948)
        at org.apache.axis2.databinding.utils.reader.ADBXMLStreamReaderImpl.next(ADBXMLStreamReaderImpl.java:821)
        at org.apache.axis2.databinding.utils.reader.WrappingXMLStreamReader.next(WrappingXMLStreamReader.java:45)
        at org.apache.axis2.databinding.utils.reader.ADBXMLStreamReaderImpl.next(ADBXMLStreamReaderImpl.java:824)
        at org.apache.axis2.util.StreamWrapper.next(StreamWrapper.java:68)
        at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:111)
        ... 28 more

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