getting servletexception while closing application context

Hi,
I am getting the following while closing the application context.

Servlet action threw unload() exception
javax.servlet.ServletException: Servlet.destroy() for servlet action threw exception
at org.apache.catalina.core.StandardWrapper.unload(St andardWrapper.java:1339)
at org.apache.catalina.core.StandardWrapper.stop(Stan dardWrapper.java:1654)
at org.apache.catalina.core.StandardContext.stop(Stan dardContext.java:4345)
at org.apache.catalina.core.ContainerBase.destroy(Con tainerBase.java:1132)
at org.apache.catalina.core.StandardContext.destroy(S tandardContext.java:4449)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.commons.modeler.BaseModelMBean.invoke(B aseModelMBean.java:503)
at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDy namicInvoker.java:164)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanSe rverImpl.java:659)
at org.jboss.web.tomcat.tc5.TomcatDeployer.performUnd eployInternal(TomcatDeployer.java:450)
at org.jboss.web.tomcat.tc5.TomcatDeployer.performUnd eploy(TomcatDeployer.java:421)
at org.jboss.web.AbstractWebDeployer.stop(AbstractWeb Deployer.java:418)
at org.jboss.web.WebModule.stopModule(WebModule.java: 100)
at org.jboss.web.WebModule.stopService(WebModule.java :66)
at org.jboss.system.ServiceMBeanSupport.jbossInternal Stop(ServiceMBeanSupport.java:315)
at org.jboss.system.ServiceMBeanSupport.jbossInternal Lifecycle(ServiceMBeanSupport.java:247)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invok e(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation .java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.j ava:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(Ab stractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanSe rverImpl.java:659)
at org.jboss.system.ServiceController$ServiceProxy.in voke(ServiceController.java:978)
at $Proxy0.stop(Unknown Source)


Can anyone tell me how to resolve this.

THanks in advance.