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java.lang.ClassNotFoundException: org.jasig.portal.jndi.PortalInitialContextFactory	at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:854)	at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:721)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:242)	at com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:42)	at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:654)	at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)	at javax.naming.InitialContext.init(InitialContext.java:223)	at javax.naming.InitialContext.(InitialContext.java:197)	at org.jasig.portal.jndi.JNDIManager.getContext(JNDIManager.java:307)	at org.jasig.portal.jndi.JNDIManager.access$200(JNDIManager.java:67)	at org.jasig.portal.jndi.JNDIManager$JNDISessionListener.valueUnbound(JNDIManager.java:335)	at org.apache.catalina.session.StandardSession.removeAttributeInternal(StandardSession.java:1569)	at org.apache.catalina.session.StandardSession.expire(StandardSession.java:711)	at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:569)	at org.apache.coyote.tomcat5.CoyoteRequest.isRequestedSessionIdValid(CoyoteRequest.java:2180)	at org.apache.coyote.tomcat5.CoyoteAdapter.parseSessionCookiesId(CoyoteAdapter.java:388)	at org.apache.coyote.tomcat5.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:299)	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:158)	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374)	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)	at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)	at java.lang.Thread.run(Thread.java:595)