java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.sun.tools.ws.processor.modeler.annotation.WebServiceAP.isSubtype(WebServiceAP.java:418)
at com.sun.tools.ws.processor.modeler.annotation.WebServiceAP.isRemote(WebServiceAP.java:413)
at com.sun.tools.ws.processor.modeler.annotation.WebServiceVisitor.isLegalType(WebServiceVisitor.java:817)
at com.sun.tools.ws.processor.modeler.annotation.WebServiceVisitor.isLegalMethod(WebServiceVisitor.java:648)
at com.sun.tools.ws.processor.modeler.annotation.WebServiceVisitor.methodsAreLegal(WebServiceVisitor.java:624)
at com.sun.tools.ws.processor.modeler.annotation.WebServiceVisitor.isLegalImplementation(WebServiceVisitor.java:542)
at com.sun.tools.ws.processor.modeler.annotation.WebServiceVisitor.shouldProcessWebService(WebServiceVisitor.java:352)
at com.sun.tools.apt.mirror.declaration.ClassDeclarationImpl.accept(ClassDeclarationImpl.java:95)
at com.sun.tools.ws.processor.modeler.annotation.WebServiceAP.buildModel(WebServiceAP.java:347)
at com.sun.mirror.apt.AnnotationProcessors$CompositeAnnotationProcessor.process(AnnotationProcessors.java:60)
at com.sun.tools.apt.comp.Apt.main(Apt.java:454)
at com.sun.tools.apt.main.JavaCompiler.compile(JavaCompiler.java:448)
at com.sun.tools.apt.main.Main.compile(Main.java:1075)
at com.sun.tools.apt.main.Main.compile(Main.java:938)
at com.sun.tools.apt.Main.processing(Main.java:95)
at com.sun.tools.apt.Main.process(Main.java:85)
at com.sun.tools.apt.Main.process(Main.java:67)
at com.sun.tools.ws.wscompile.CompileTool.buildModel(CompileTool.java:605)
at com.sun.tools.ws.wscompile.CompileTool.run(CompileTool.java:538)
at com.sun.tools.ws.util.ToolBase.run(ToolBase.java:56)
at com.sun.tools.ws.util.WSToolsObjectFactoryImpl.wsgen(WSToolsObjectFactoryImpl.java:44)
at com.sun.enterprise.webservice.WsUtil.runWsGen(WsUtil.java:1820)
at com.sun.enterprise.webservice.WsUtil.genWSInfo(WsUtil.java:2089)
at com.sun.enterprise.deployment.backend.ModuleDeployer.loadDescriptors(ModuleDeployer.java:396)
at com.sun.enterprise.deployment.backend.EjbModuleDeployer.deploy(EjbModuleDeployer.java:138)
at com.sun.enterprise.deployment.backend.ModuleDeployer.doRequestFinish(ModuleDeployer.java:160)
at com.sun.enterprise.deployment.phasing.J2EECPhase.runPhase(J2EECPhase.java:169)
at com.sun.enterprise.deployment.phasing.DeploymentPhase.executePhase(DeploymentPhase.java:95)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.executePhases(PEDeploymentService.java:871)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:266)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:739)
at com.sun.enterprise.management.deploy.DeployThread.deploy(DeployThread.java:174)
at com.sun.enterprise.management.deploy.DeployThread.run(DeployThread.java:210)

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