destroy() on bean with name 'userCache' threw an exception

Hi everybody,
I always get the following exception when I stop my server(WebSphere_5.1).

I use:
-Acegi-Security-0.6 (using quickstart configuration came with Acegi package)
-HSQLDB(auth tables inside dbinit.txt exist)
-WebSphere AppServer 5.1

Code:

[9/22/04 21:34:38:016 EEST] 7036e5e3 XmlWebApplica I org.springframework.web.context.support.XmlWebApplicationContext Closing application context [XmlWebApplicationContext for namespace 'action-servlet'] [9/22/04 21:34:38:047 EEST] 7036e5e3 DefaultListab I org.springframework.beans.factory.support.DefaultListableBeanFactory Destroying singletons in factory {org.springframework.beans.factory.support.DefaultListableBeanFactory defining beans [authenticationDao,filterInvocationInterceptor,daoAuthenticationProvider,userCache,authenticationManager,roleVoter,accessDecisionManager,authenticationProcessingFilter,securityEnforcementFilter,authenticationProcessingFilterEntryPoint,autoIntegrationFilter,dataSource,sessionFactory,transactionManager,userDAO,userManagerTarget,userManager,/user]; parent=<org.springframework.beans.factory.support.DefaultListableBeanFactory defining beans [authenticationDao,filterInvocationInterceptor,daoAuthenticationProvider,userCache,authenticationManager,roleVoter,accessDecisionManager,authenticationProcessingFilter,securityEnforcementFilter,authenticationProcessingFilterEntryPoint,autoIntegrationFilter,dataSource,sessionFactory,transactionManager,userDAO,userManagerTarget,userManager]; Root of BeanFactory hierarchy>} [9/22/04 21:34:38:047 EEST] 7036e5e3 LocalSessionF I org.springframework.orm.hibernate.LocalSessionFactoryBean Closing Hibernate SessionFactory [9/22/04 21:34:38:047 EEST] 7036e5e3 SessionFactor I net.sf.hibernate.impl.SessionFactoryImpl closing [9/22/04 21:34:38:047 EEST] 7036e5e3 DefaultListab E org.springframework.beans.factory.support.DefaultListableBeanFactory destroy() on bean with name 'userCache' threw an exception [9/22/04 21:34:38:062 EEST] 7036e5e3 DefaultListab E org.springframework.beans.factory.support.DefaultListableBeanFactory TRAS0014I: The following exception was logged java.lang.NullPointerException at net.sf.acegisecurity.providers.dao.cache.EhCacheBasedUserCache.destroy(EhCacheBasedUserCache.java:112) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.destroyBean(AbstractAutowireCapableBeanFactory.java:863) at org.springframework.beans.factory.support.AbstractBeanFactory.destroySingleton(AbstractBeanFactory.java:374) at org.springframework.beans.factory.support.AbstractBeanFactory.destroySingletons(AbstractBeanFactory.java:360) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.destroySingletons(AbstractAutowireCapableBeanFactory.java:826) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:387) at org.springframework.web.struts.ContextLoaderPlugIn.destroy(ContextLoaderPlugIn.java:330) at org.apache.struts.action.ActionServlet.destroyModules(ActionServlet.java:553) at org.apache.struts.action.ActionServlet.destroy(ActionServlet.java:347) at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doDestroy(StrictServletInstance.java:159) at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._destroy(StrictLifecycleServlet.java:218) at com.ibm.ws.webcontainer.servlet.IdleServletState.destroy(StrictLifecycleServlet.java:316) at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.destroy(StrictLifecycleServlet.java:119) at com.ibm.ws.webcontainer.servlet.ServletInstance.destroy(ServletInstance.java:470) at com.ibm.ws.webcontainer.servlet.ServletManager.removeServlet(ServletManager.java:153) at com.ibm.ws.webcontainer.webapp.WebAppServletManager.removeServlet(WebAppServletManager.java:410) at com.ibm.ws.webcontainer.servlet.ServletManager.removeAllServlets(ServletManager.java:186) at com.ibm.ws.webcontainer.webapp.WebApp.destroy(WebApp.java:380) at com.ibm.ws.webcontainer.srt.WebGroup.shutdown(WebGroup.java:1334) at com.ibm.ws.webcontainer.WebContainer.removeWebApplication(WebContainer.java:1050) at com.ibm.ws.runtime.component.WebContainerImpl.uninstall(WebContainerImpl.java:147) at com.ibm.ws.runtime.component.WebContainerImpl.stop(WebContainerImpl.java:367) at com.ibm.ws.runtime.component.ApplicationMgrImpl.stop(ApplicationMgrImpl.java:519) at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStop(DeployedApplicationImpl.java:813) at com.ibm.ws.runtime.component.DeployedModuleImpl.stop(DeployedModuleImpl.java:381) at com.ibm.ws.runtime.component.DeployedApplicationImpl.stop(DeployedApplicationImpl.java:615) at com.ibm.ws.runtime.component.ApplicationMgrImpl.stopApplication(ApplicationMgrImpl.java:410) at com.ibm.ws.runtime.component.ApplicationMgrImpl.stopApplication(ApplicationMgrImpl.java:596) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code)) at java.lang.reflect.Method.invoke(Method.java(Compiled Code)) at com.tivoli.jmx.modelmbean.MMBInvoker.invoke(MMBInvoker.java:46) at com.tivoli.jmx.modelmbean.MMBInvoker.invokeOperation(MMBInvoker.java:115) at com.tivoli.jmx.modelmbean.DynamicModelMBeanSupport.invoke(DynamicModelMBeanSupport.java:409) at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:323) at com.tivoli.jmx.GenericMBeanSupport.invoke(GenericMBeanSupport.java:178) at com.tivoli.jmx.MBeanAccess.invoke(MBeanAccess.java:113) at com.tivoli.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:290) at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:659) at com.ibm.ws.management.connector.AdminServiceDelegator.invoke(AdminServiceDelegator.java:130) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code)) at java.lang.reflect.Method.invoke(Method.java(Compiled Code)) at com.ibm.ws.management.connector.soap.SOAPConnector.invoke(SOAPConnector.java:306) at com.ibm.ws.management.connector.soap.SOAPConnector.service(SOAPConnector.java:178) at com.ibm.ws.management.connector.soap.SOAPConnection.handleRequest(SOAPConnection.java:55) at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:618) at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:439) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:672)

Any idea?