Tomcat报错！！！！！
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)at java.lang.Thread.run(Thread.java:534)Jan 17, 2007 1:14:56 PM org.apache.struts.action.ActionServlet initSEVERE: Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable. Most likely, this is due to an incorrect or missing library dependency.java.lang.NullPointerExceptionat org.apache.commons.digester.Digester.getXMLReader(Digester.java:891)at org.apache.commons.digester.Digester.parse(Digester.java:1572)at org.apache.struts.action.ActionServlet.parseModuleConfigFile(ActionServlet.java:738)at org.apache.struts.action.ActionServlet.initModuleConfig(ActionServlet.java:687)at org.apache.struts.action.ActionServlet.init(ActionServlet.java:333)at javax.servlet.GenericServlet.init(GenericServlet.java:211)at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4013)at org.apache.catalina.core.StandardContext.start(StandardContext.java:4357)at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3043)at org.apache.catalina.manager.ManagerServlet.reload(ManagerServlet.java:1014)at org.apache.catalina.manager.HTMLManagerServlet.reload(HTMLManagerServlet.java:476)at org.apache.catalina.manager.HTMLManagerServlet.doGet(HTMLManagerServlet.java:98)at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)at org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:287)at org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:84)at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)at java.lang.Thread.run(Thread.java:534)ds is ok:ds=nullds is wrong?ds is nullJan 17, 2007 1:15:27 PM org.apache.catalina.core.StandardHostDeployer stopINFO: standardHost.stop /ROOTJan 17, 2007 1:15:28 PM org.apache.catalina.core.StandardHostDeployer startINFO: standardHost.start /ROOTJan 17, 2007 1:15:28 PM org.apache.commons.digester.Digester getParserSEVERE: Digester.getParser:org.xml.sax.SAXNotRecognizedException: http://apache.org/xml/features/validation/dynamicat gnu.xml.aelfred2.JAXPFactory.setFeature(JAXPFactory.java:102)at org.apache.commons.digester.parser.XercesParser.configureXerces(XercesParser.java:185)at org.apache.commons.digester.parser.XercesParser.newSAXParser(XercesParser.java:138)at org.apache.commons.digester.ParserFeatureSetterFactory.newSAXParser(ParserFeatureSetterFactory.java:73)at org.apache.commons.digester.Digester.getParser(Digester.java:682)at org.apache.commons.digester.Digester.getXMLReader(Digester.java:891)at org.apache.commons.digester.Digester.parse(Digester.java:1572)at org.apache.struts.action.ActionServlet.parseModuleConfigFile(ActionServlet.java:738)at org.apache.struts.action.ActionServlet.initModuleConfig(ActionServlet.java:687)at org.apache.struts.action.ActionServlet.init(ActionServlet.java:333)

[解决办法]
lang.NullPointerException

其他的没看明白