tomcat启动可以，但是不能连接！！！

Question

2008-1-19 21:41:18 org.apache.tomcat.util.digester.Digester fatalError
严重: Parse Fatal Error at line 1 column 1: Content is not allowed in prolog.
org.xml.sax.SAXParseException: Content is not allowed in prolog.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1580)
at org.apache.catalina.users.MemoryUserDatabase.open(MemoryUserDatabase.java:401)
at org.apache.catalina.users.MemoryUserDatabaseFactory.getObjectInstance(MemoryUserDatabaseFactory.java:102)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:139)
at javax.naming.spi.NamingManager.getObjectInstance(Unknown Source)
at org.apache.naming.NamingContext.lookup(NamingContext.java:792)
at org.apache.naming.NamingContext.lookup(NamingContext.java:152)
at org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:252)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1005)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
2008-1-19 21:41:18 org.apache.naming.NamingContext lookup
警告: Unexpected exception resolving reference
org.xml.sax.SAXParseException: Content is not allowed in prolog.
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1580)
at org.apache.catalina.users.MemoryUserDatabase.open(MemoryUserDatabase.java:401)
at org.apache.catalina.users.MemoryUserDatabaseFactory.getObjectInstance(MemoryUserDatabaseFactory.java:102)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:139)
at javax.naming.spi.NamingManager.getObjectInstance(Unknown Source)
at org.apache.naming.NamingContext.lookup(NamingContext.java:792)
at org.apache.naming.NamingContext.lookup(NamingContext.java:152)
at org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:252)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1005)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
2008-1-19 21:41:18 org.apache.catalina.realm.UserDatabaseRealm start
严重: Exception looking up UserDatabase under key UserDatabase
javax.naming.NamingException: Content is not allowed in prolog.
at org.apache.naming.NamingContext.lookup(NamingContext.java:804)
at org.apache.naming.NamingContext.lookup(NamingContext.java:152)
at org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:252)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1005)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
2008-1-19 21:41:18 org.apache.catalina.startup.Catalina start
严重: Catalina.start: 
LifecycleException:  No UserDatabase component found under key UserDatabase
at org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:260)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1005)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
2008-1-19 21:41:18 org.apache.catalina.startup.Catalina start
信息: Server startup in 203 ms
2008-1-19 21:48:17 org.apache.coyote.http11.Http11BaseProtocol pause
信息: Pausing Coyote HTTP/1.1 on http-8080
2008-1-19 21:48:18 org.apache.catalina.core.StandardService stop
信息: Stopping service Catalina
2008-1-19 21:48:18 org.apache.catalina.startup.Catalina stop
严重: Catalina.stop
LifecycleException:  Pipeline has not been started
at org.apache.catalina.core.StandardPipeline.stop(StandardPipeline.java:256)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1059)
at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:447)
at org.apache.catalina.core.StandardService.stop(StandardService.java:512)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:743)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:601)
at org.apache.catalina.startup.Catalina.start(Catalina.java:576)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)

Answer 1

好像是用到org.apache.tomcat.util.digester.Digester这个类的时候遇到了致命错误，可能是你哪个配置文件出了问题，不能正常解析。

Answer 2

检查你的server.xml配置文件吧！最近是不是编辑过，
用记事本打开就可以，看看是不是有中文什么的不合法字符！特别是一些不可见的字符。实在不行，重新解压缩一个原始的server.xml 然后重新修改配置算了！

Answer 3

你的XML配置文件格式错误想想最近对哪些XML配置文件做过更改吧

Answer 4

XML问题，你可以先将最近修改过的xml还原成原始的，再试一下