at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:227) ~[servlet-api-2.5.jar:2.5]
	at org.zkoss.zk.ui.http.WebManager.getSession(WebManager.java:426) ~[zk-6.5.4.1.avanon01.jar:6.5.4]
	at org.zkoss.zk.ui.http.SessionResolverImpl.getSession(SessionResolverImpl.java:37) ~[zk-6.5.4.1.avanon01.jar:6.5.4]
	at org.zkoss.zk.ui.Sessions.getCurrent(Sessions.java:57) ~[zk-6.5.4.1.avanon01.jar:6.5.4]
	at org.zkoss.zk.ui.Sessions.getCurrent(Sessions.java:45) ~[zk-6.5.4.1.avanon01.jar:6.5.4]
	at org.zkoss.zk.ui.http.HttpSessionListener23.attributeAdded(HttpSessionListener23.java:55) ~[zk-6.5.4.1.avanon01.jar:6.5.4]
	at org.eclipse.jetty.server.session.AbstractSessionManager.doSessionAttributeListeners(AbstractSessionManager.java:850) ~[jetty-server-7.6.11.v20130520.jar:7.6.11.v20130520]
	at org.eclipse.jetty.server.session.AbstractSession.setAttribute(AbstractSession.java:458) ~[jetty-server-7.6.11.v20130520.jar:7.6.11.v20130520]
	at net.bull.javamelody.SessionListener.sessionCreated(SessionListener.java:286) ~[javamelody-core-1.50.0.jar:1.50.0]
	at org.eclipse.jetty.server.session.AbstractSessionManager.addSession(AbstractSessionManager.java:686) ~[jetty-server-7.6.11.v20130520.jar:7.6.11.v20130520]
	at org.eclipse.jetty.server.session.AbstractSessionManager.newHttpSession(AbstractSessionManager.java:501) ~[jetty-server-7.6.11.v20130520.jar:7.6.11.v20130520]
	at org.eclipse.jetty.server.Request.getSession(Request.java:1189) ~[jetty-server-7.6.11.v20130520.jar:7.6.11.v20130520]
	at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:227) ~[servlet-api-2.5.jar:2.5]