tomcat启动报错?报错

tomcat启动时报这个错:

SEVERE: Error processing TLD files for context path /tg
javax.servlet.ServletException: Exception processing TLD at resource path /WEB-INF/tags/struts-nested.tld in context /tg
 at org.apache.catalina.startup.TldConfig.tldScanTld(TldConfig.java:541)
 at org.apache.catalina.startup.TldConfig.execute(TldConfig.java:305)
 at org.apache.catalina.startup.TldConfig.lifecycleEvent(TldConfig.java:729)
 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4184)
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
 at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
 at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
 at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
 at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150)
 at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
 at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
 at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
 at org.apache.catalina.core.StandardService.start(StandardService.java:448)
 at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
 at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
 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:295)
 at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)

这个是什么问题，有人遇到没？？？