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    Thrown to indicate that a method has been passed an illegal or inappropriate argument. Check that you don't have more than one method existing with the same name.

Solutions on the web

via Apache's JIRA Issue Tracker by Valerio Schiavoni, 1 year ago
null while invoking public abstract java.lang.String fr.inria.galaxy.j1.scenario1.ISummaryService.createSummary(java.lang.String,java.lang.String,java.lang.String,double,java.lang.String,java.lang.String) with params [null, null, null, null, null, null].
via Coderanch by Eder Villanueva, 1 year ago
null while invoking public java.lang.String ws.Test.getMyMsg(java.lang.String) with params [null].
via Stack Overflow by user2629746
, 2 years ago
object is not an instance of declaring class while invoking public java.lang.String org.*.api.TestRestServiceImpl.getHtml() with p arams [].
java.lang.IllegalArgumentException: 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:166)	at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:82)	at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:68)	at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:57)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)	at java.util.concurrent.FutureTask.run(FutureTask.java:123)	at org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:37)	at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:95)	at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)	at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:89)	at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.serviceRequest(JettyHTTPDestination.java:302)	at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(JettyHTTPDestination.java:265)	at org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(JettyHTTPHandler.java:70)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at org.mortbay.jetty.Server.handle(Server.java:324)	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535)	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:880)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:747)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)