nutch项目用ant编译后放tomcat里面发布

nutch项目用ant编译后放tomcat里面发布
报异常信息: Deploying web application directory ROOT
2012-05-03 10:33:21,989 INFO  NutchBean - creating new bean
2012-05-03 10:33:22,408 INFO  SearchBean - opening merged index in file:///f:/nutch/crawl/index
2012-05-03 10:33:22,755 WARN  PluginRepository - Plugins: directory not found: ./src/plugin
2012-05-03 10:33:22,755 INFO  PluginRepository - Plugin Auto-activation mode: [true]
2012-05-03 10:33:22,755 INFO  PluginRepository - Registered Plugins:
2012-05-03 10:33:22,755 INFO  PluginRepository -  NONE
2012-05-03 10:33:22,755 INFO  PluginRepository - Registered Extension-Points:
2012-05-03 10:33:22,755 INFO  PluginRepository -  NONE
2012-5-3 10:33:22 org.apache.catalina.core.StandardContext listenerStart
严重: Exception sending context initialized event to listener instance of class org.apache.nutch.searcher.NutchBean$NutchBeanConstructor
java.lang.RuntimeException: org.apache.nutch.searcher.QueryFilter not found.
at org.apache.nutch.searcher.QueryFilters.<init>(QueryFilters.java:62)
at org.apache.nutch.searcher.IndexSearcher.init(IndexSearcher.java:80)
at org.apache.nutch.searcher.IndexSearcher.<init>(IndexSearcher.java:72)
at org.apache.nutch.searcher.LuceneSearchBean.init(LuceneSearchBean.java:60)
at org.apache.nutch.searcher.LuceneSearchBean.<init>(LuceneSearchBean.java:51)
at org.apache.nutch.searcher.NutchBean.<init>(NutchBean.java:106)
at org.apache.nutch.searcher.NutchBean.<init>(NutchBean.java:81)
at org.apache.nutch.searcher.NutchBean$NutchBeanConstructor.contextInitialized(NutchBean.java:471)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
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:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2012-05-03 10:33:22,757 INFO  NutchBean - Closing Bean
2012-05-03 10:33:22,757 WARN  NutchBean - No bean configured, or the wrong type?  Potential PermGen leak, or startup problem.
2012-5-3 10:33:22 org.apache.catalina.core.StandardContext start
严重: Error listenerStart
2012-5-3 10:33:22 org.apache.catalina.core.StandardContext start
严重: Context [] startup failed due to previous errors
2012-5-3 10:33:23 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory ROOT1
2012-5-3 10:33:23 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2012-5-3 10:33:23 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2012-5-3 10:33:23 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/47  config=null
2012-5-3 10:33:23 org.apache.catalina.startup.Catalina start
信息: Server startup in 2377 ms请问是什么原因啊。