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java.lang.ClassCastException: 	at com.sun.web.server.J2EEInstanceListener.handleBeforeEvent(J2EEInstanceListener.java:142)	at com.sun.web.server.J2EEInstanceListener.instanceEvent(J2EEInstanceListener.java:80)	at org.apache.catalina.util.InstanceSupport.fireInstanceEvent(InstanceSupport.java:342)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:700)	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:444)	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:363)	at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)	at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)	at org.securityfilter.filter.SecurityFilter.doFilter(SecurityFilter.java:182)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:265)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)	at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)	at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)