我正在构建一个需要使用SOAP服务的后端。我使用wsimport从WSDL生成了我的源代码。在处理devserver上的请求时执行外部服务调用时，我得到以下内容。有任何建议如何解决问题？
> HTTP ERROR 500
>
> Problem accessing /hello. Reason:
>
> MASM0001: Default configuration file [ jaxws-tubes-default.xml ] was not found
>
> Caused by:
>
> java.lang.IllegalStateException: MASM0001: Default configuration file
> [ jaxws-tubes-default.xml ] was not found at
> com.sun.xml.internal.ws.assembler.MetroConfigLoader.init(MetroConfigLoader.java:127)
> at
> com.sun.xml.internal.ws.assembler.MetroConfigLoader.<init>(MetroConfigLoader.java:104)
> at
> com.sun.xml.internal.ws.assembler.TubelineAssemblyController.getTubeCreators(TubelineAssemblyController.java:78)
> at
> com.sun.xml.internal.ws.assembler.MetroTubelineAssembler.createClient(MetroTubelineAssembler.java:103)
> at com.sun.xml.internal.ws.client.Stub.createPipeline(Stub.java:328)
> at com.sun.xml.internal.ws.client.Stub.<init>(Stub.java:295) at
> com.sun.xml.internal.ws.client.Stub.<init>(Stub.java:228) at
> com.sun.xml.internal.ws.client.Stub.<init>(Stub.java:243) at
> com.sun.xml.internal.ws.client.sei.SEIStub.<init>(SEIStub.java:84) at
> com.sun.xml.internal.ws.client.WSServiceDelegate.getStubHandler(WSServiceDelegate.java:814)
> at
> com.sun.xml.internal.ws.client.WSServiceDelegate.createEndpointIFBaseProxy(WSServiceDelegate.java:803)
> at
> com.sun.xml.internal.ws.client.WSServiceDelegate.getPort(WSServiceDelegate.java:436)
> at
> com.sun.xml.internal.ws.client.WSServiceDelegate.getPort(WSServiceDelegate.java:404)
> at
> com.sun.xml.internal.ws.client.WSServiceDelegate.getPort(WSServiceDelegate.java:386)
> at javax.xml.ws.Service.getPort(Service.java:119) at
> com.chrome.services.description7b.Description7B.getDescription7BPort(Description7B.java:72)
> at com.mypackage.appapi.HelloAppEngine.doGet(HelloAppEngine.java:41)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
> at
> com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:128)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
> at
> com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
> at
> com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
> at
> com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:95)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at
> com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:508)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326) at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) at
> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) 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:582)