Java.lang.Exception: Couldn't find a matching Java operation for WSDD

Question

Hi all,
i used Eclipse to create a web service. actually i created a class with the following code:public class Add2Num {
     public int Add2Numbers(int x,int y)
          return x+y;
}then i tried to generate wsdl file for this class, after i generate the wsdl file, i tried to run it but the following exception appear:
org.apache.axis.InternalException <init>
SEVERE: Exception:
java.lang.Exception: Couldn't find a matching Java operation for WSDD operation "add2Numbers" (2 args)
     at org.apache.axis.InternalException.<init>(InternalException.java:71)
     at org.apache.axis.description.JavaServiceDesc.loadServiceDescByIntrospection(JavaServiceDesc.java:891)
     at org.apache.axis.providers.java.JavaProvider.initServiceDesc(JavaProvider.java:477)
     at org.apache.axis.handlers.soap.SOAPService.getInitializedServiceDesc(SOAPService.java:285)
     at org.apache.axis.deployment.wsdd.WSDDService.makeNewInstance(WSDDService.java:500)
     at org.apache.axis.deployment.wsdd.WSDDDeployableItem.getNewInstance(WSDDDeployableItem.java:274)
     at org.apache.axis.deployment.wsdd.WSDDDeployableItem.getInstance(WSDDDeployableItem.java:260)
     at org.apache.axis.deployment.wsdd.WSDDDeployment.getService(WSDDDeployment.java:427)
     at org.apache.axis.configuration.FileProvider.getService(FileProvider.java:231)
     at org.apache.axis.AxisEngine.getService(AxisEngine.java:311)
     at org.apache.axis.MessageContext.setTargetService(MessageContext.java:755)
     at org.apache.axis.handlers.http.URLMapper.invoke(URLMapper.java:50)
     at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.server.AxisServer.invoke(AxisServer.java:239)
     at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
     at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
     at java.lang.Thread.run(Thread.java:595)

Answer 1

The cause is case mismatch.
     Your method signature : public int Add2Numbers(int x,int y) --- Upper Case
But the signature produced is
ouldn't find a matching Java operation for WSDD operation "add2Numbers" (2 args)
( from the error trace ) -- Lower case.
     Change the case of your method to add2number (lowercase ) as per conventions and you code will work.
Rgdz,
Saroj Kumar