Tomcat启动错误 Caused by: java.lang.AbstractMethodError
2011-3-21 10:53:00 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not
found on the Java.library.path: D:\Program Files\Java\jdk1.6.0
\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;D:\Program Files\Java\jdk1.6.0\jre\bin;D:/Program
Files/Java/jdk1.6.0/bin/../jre/bin/client;D:/Program
Files/Java/jdk1.6.0/bin/../jre/bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program
Files\Yuguo;C:\Program Files\MySQL\MySQL Server 5.1\bin;D:\Program Files\Java\jdk1.6.0\bin;D:\Program Files\groovy-
1.7.3\bin;D:\Program Files\maven\bin;C:\Program Files\Common Files\Thunder Network\KanKan\Codecs
2011-3-21 10:53:00 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2011-3-21 10:53:00 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 721 ms
2011-3-21 10:53:00 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2011-3-21 10:53:00 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.16
2011-3-21 10:53:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(E:\workspace\exam\WebRoot\WEB-INF\lib\gwt-user.jar) - jar not loaded. See Servlet Spec 2.3,
section 9.7.2. Offending class: javax/servlet/Servlet.class
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:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.AbstractMethodError
at org.apache.tomcat.util.digester.Digester.getXMLReader(Digester.java:992)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1644)
at org.apache.catalina.startup.TldConfig.tldScanStream(TldConfig.java:518)
at org.apache.catalina.startup.TldConfig.tldScanJar(TldConfig.java:476)
at org.apache.catalina.startup.TldConfig.execute(TldConfig.java:301)
at org.apache.catalina.core.StandardContext.processTlds(StandardContext.java:4441)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4248)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
... 6 more
原因：jar包冲突 。