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java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.hash(ConcurrentHashMap.java:157) at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:730) at org.apache.tuscany.sca.core.assembly.RuntimeWireImpl.getInvocationChain(RuntimeWireImpl.java:144) at org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:103) at org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:98) at org.apache.tuscany.sca.core.assembly.RuntimeWireImpl.invoke(RuntimeWireImpl.java:175) at org.apache.tuscany.sca.binding.rmi.provider.RMIServiceBindingProvider.invokeTarget(RMIServiceBindingProvider.java:148) at org.apache.tuscany.sca.binding.rmi.provider.RMIServiceBindingProvider$1.intercept(RMIServiceBindingProvider.java:110) at $java.rmi.server.UnicastRemoteObject$$EnhancerByCGLIB$$a0894c50.insert(<generated>) 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 sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294) at sun.rmi.transport.Transport$1.run(Transport.java:153) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:149) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707) at java.lang.Thread.run(Thread.java:595) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:126) at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:179) at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132) at $Proxy6.insert(Unknown Source) at test.RMIServerTestCase.testUserService(RMIServerTestCase.java:32) 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 junit.framework.TestCase.runTest(TestCase.java:168) at junit.framework.TestCase.runBare(TestCase.java:134) at junit.framework.TestResult$1.protect(TestResult.java:110) at junit.framework.TestResult.runProtected(TestResult.java:128) at junit.framework.TestResult.run(TestResult.java:113) at junit.framework.TestCase.run(TestCase.java:124) at junit.framework.TestSuite.runTest(TestSuite.java:232) at junit.framework.TestSuite.run(TestSuite.java:227) at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83) at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62) at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138) at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125) at org.apache.maven.surefire.Surefire.run(Surefire.java:132) 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.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:308) at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:879)