Question : Tomcat Error

I am getting the following error when trying to load up my application, please note that this error has only recently cropped up. Any help would be much appreciated
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21-Sep-2009 17:43:48 org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
21-Sep-2009 17:43:48 org.apache.catalina.core.StandardContext start
SEVERE: Context [] startup failed due to previous errors
21-Sep-2009 17:43:48 org.apache.catalina.core.StandardContext processTlds
SEVERE: Error reading tld listeners java.lang.NullPointerException
java.lang.NullPointerException
        at org.apache.log4j.Category.isEnabledFor(Category.java:737)
        at org.apache.commons.logging.impl.Log4JLogger.isTraceEnabled(Log4JLogger.java:327)
        at org.apache.catalina.startup.TldConfig.tldScanResourcePaths(TldConfig.java:581)
        at org.apache.catalina.startup.TldConfig.execute(TldConfig.java:282)
        at org.apache.catalina.core.StandardContext.processTlds(StandardContext.java:4278)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4115)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:904)
        at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:867)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:474)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
        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(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)

Answer : Tomcat Error

http://forum.springsource.org/showthread.php?t=34318

do u check that spring forum !!

 remove ur log4j and check

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