请教一个xfire问题

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请教一个xfire问题5

我用xfire写一个webservice,但用客户端调用时偶尔会出现下面异常,而且 CPU占了差不多50%,是什么原因?
com.sun.org.apache.xerces.internal.xni.XNIException: XML version "<?xml version=" is not supported, only XML 1.0 is supported.
at com.sun.xml.internal.stream.StaxErrorReporter.reportError(StaxErrorReporter.java:152)
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1411)
at com.sun.org.apache.xerces.internal.impl.XMLScanner.scanXMLDeclOrTextDecl(XMLScanner.java:459)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanXMLDeclOrTextDecl(XMLDocumentFragmentScannerImpl.java:949)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$XMLDeclDriver.next(XMLDocumentScannerImpl.java:806)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:645)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.setInputSource(XMLStreamReaderImpl.java:207)
at com.sun.xml.internal.stream.XMLInputFactoryImpl.getXMLStreamReaderImpl(XMLInputFactoryImpl.java:275)
at com.sun.xml.internal.stream.XMLInputFactoryImpl.createXMLStreamReader(XMLInputFactoryImpl.java:160)
at org.codehaus.xfire.util.STAXUtils.createXMLStreamReader(STAXUtils.java:762)
at org.codehaus.xfire.transport.http.XFireServletController.invoke(XFireServletController.java:297)
at org.codehaus.xfire.transport.http.XFireServletController.doService(XFireServletController.java:129)
at org.codehaus.xfire.spring.remoting.XFireServletControllerAdapter.handleRequest(XFireServletControllerAdapter.java:67)
at org.codehaus.xfire.spring.remoting.XFireExporter.handleRequest(XFireExporter.java:48)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:857)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:460)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:425)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:619)

SOA