Problems when deploy nutch-1.0.war

I have installed nutch1.0 on Ubuntu9.0.4, the namenode, datanode,
jobbut when I deploy nutch-1.0.war, I get the following errors in
Tomcat6. What's the problem?

Java -version:
java version "1.6.0_13"
Java(TM) SE Runtime Environment (build 1.6.0_13-b03)
Java HotSpot(TM) Client VM (build 11.3-b02, mixed mode, sharing)

I installed Tomcat6 by using: #apt-get install tomcat6
The default ROOT application is OK.
I copied nutch-1.0.war to /var/lib/tomcat6/webapps
cp nutch*.war /var/lib/tomcat6/webapps/ROOT.war
Then error occurred, here is the log files: catalina.2009-07-04.log
and localhost.2009-07-04.log.

catalina.2009-07-04.log
2009-7-4 15:03:26 org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
2009-7-4 15:03:26 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 628 ms
2009-7-4 15:03:26 org.apache.catalina.users.MemoryUserDatabase save
WARNING: User database is not persistable - no write permissions on directory
2009-7-4 15:03:26 org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
2009-7-4 15:03:26 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.18
2009-7-4 15:03:26 org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive ROOT.war
2009-7-4 15:03:27 org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
2009-7-4 15:03:27 org.apache.catalina.core.StandardContext start
SEVERE: Context [] startup failed due to previous errors
2009-7-4 15:03:28 org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
2009-7-4 15:03:28 org.apache.catalina.startup.Catalina start
INFO: Server startup in 1397 ms

localhost.2009-07-04.log
2009-7-4 15:03:27 org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener
instance of class
org.apache.nutch.searcher.NutchBean$NutchBeanConstructor
java.lang.RuntimeException: java.security.AccessControlException:
access denied (java.lang.reflect.ReflectPermission
suppressAccessChecks)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:81)
        at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1366)
        at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:56)
        at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1379)
        at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:215)
        at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:120)
        at org.apache.nutch.searcher.NutchBean.<init>(NutchBean.java:89)
        at org.apache.nutch.searcher.NutchBean.<init>(NutchBean.java:77)
        at org.apache.nutch.searcher.NutchBean$NutchBeanConstructor.contextInitialized(NutchBean.java:425)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4338)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:123)
        at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:145)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:769)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:830)
        at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:719)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
        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)
        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 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.commons.daemon.support.DaemonLoader.start(DaemonLoader.java:177)
Caused by: java.security.AccessControlException: access denied
(java.lang.reflect.ReflectPermission suppressAccessChecks)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
        at java.security.AccessController.checkPermission(AccessController.java:546)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
        at java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:107)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:76)
        ... 39 more