在eclipse下用tomcat调试Dynamic web project项目失败

Question

我调试一个很偏僻的专业代码，用的技术很普通，就是WTP1.5.2+TOMCAT5.5.23+JDK1.5.0，而且以前调试成功过，所以代码应该是正确的。但由于前段时间重装机器，所以，项目都是重新创建的，结果TOMCAT启动失败，我找不到原因，请各位大侠帮忙分析一下，问题在哪，应该从哪个方向解决，万谢。启动时，报错如下：
2007-11-3 17:11:09 org.apache.catalina.startup.ClusterRuleSetFactory getClusterRuleSet
信息: Unable to find a cluster rule set in the classpath. Will load the default rule set.
2007-11-3 17:11:09 org.apache.catalina.startup.ClusterRuleSetFactory getClusterRuleSet
信息: Unable to find a cluster rule set in the classpath. Will load the default rule set.
2007-11-3 17:11:09 org.apache.catalina.startup.Catalina load
警告: Can't load server.xml from E:\SD\dev\AutoVue\eclipse\conf\server.xml
2007-11-3 17:11:09 org.apache.catalina.startup.ClusterRuleSetFactory getClusterRuleSet
信息: Unable to find a cluster rule set in the classpath. Will load the default rule set.
2007-11-3 17:11:09 org.apache.catalina.startup.ClusterRuleSetFactory getClusterRuleSet
信息: Unable to find a cluster rule set in the classpath. Will load the default rule set.
2007-11-3 17:11:09 org.apache.catalina.startup.Catalina load
警告: Can't load server.xml from E:\SD\dev\AutoVue\eclipse\conf\server.xml
2007-11-3 17:11:09 org.apache.catalina.startup.Catalina start
信息: Server startup in 0 ms
java.lang.reflect.InvocationTargetException
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.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: java.lang.NullPointerException
at org.apache.catalina.startup.Catalina.await(Catalina.java:616)
at org.apache.catalina.startup.Catalina.start(Catalina.java:576)
... 6 more

Answer 1

我注意到它找不到server.xml，所以，我在VM arguments下增加了：
-Dcatalina.home="E:\tools\dev\apache-tomcat-5.5.23"，结果得到如下错误：2007-11-3 16:04:39 org.apache.tomcat.util.digester.Digester startElement
严重: Begin event threw exception
java.lang.NullPointerException
at org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:205)
at org.apache.tomcat.util.digester.Rule.begin(Rule.java:153)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1276)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:798)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:878)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(XMLDocumentScannerImpl.java:1157)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1794)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
at org.apache.catalina.startup.Catalina.load(Catalina.java:490)
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.catalina.startup.Bootstrap.load(Bootstrap.java:267)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
2007-11-3 16:04:40 org.apache.catalina.startup.Catalina load
警告: Catalina.start using conf/server.xml: 
java.lang.NullPointerException
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2726)
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2752)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1279)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:798)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:878)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(XMLDocumentScannerImpl.java:1157)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1794)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
at org.apache.catalina.startup.Catalina.load(Catalina.java:490)
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.catalina.startup.Bootstrap.load(Bootstrap.java:267)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
2007-11-3 16:04:40 org.apache.tomcat.util.digester.Digester startElement
严重: Begin event threw exception
java.lang.NullPointerException
at org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:205)
at org.apache.tomcat.util.digester.Rule.begin(Rule.java:153)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1276)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:798)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:878)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(XMLDocumentScannerImpl.java:1157)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1794)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
at org.apache.catalina.startup.Catalina.load(Catalina.java:490)
at org.apache.catalina.startup.Catalina.start(Catalina.java:544)
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.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
2007-11-3 16:04:40 org.apache.catalina.startup.Catalina load

Answer 2

警告: Catalina.start using conf/server.xml: 
java.lang.NullPointerException
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2726)
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2752)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1279)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:798)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:878)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(XMLDocumentScannerImpl.java:1157)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1794)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
at org.apache.catalina.startup.Catalina.load(Catalina.java:490)
at org.apache.catalina.startup.Catalina.start(Catalina.java:544)
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.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
2007-11-3 16:04:40 org.apache.catalina.startup.Catalina start
信息: Server startup in 0 ms
java.lang.reflect.InvocationTargetException
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.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: java.lang.NullPointerException
at org.apache.catalina.startup.Catalina.await(Catalina.java:616)
at org.apache.catalina.startup.Catalina.start(Catalina.java:576)
... 6 more我启动的Classpath请查看附件。