anonymous wrote : But, for the browser it is as if the pushlet hadn´t been disconnected, so it ignores the headers. Are you saying the presence of httpd as a proxy in the middle is masking the failure of server1 from the browser; the browser thinks the existing connection to server1 is maintained? E.g.: browser makes request to httpd httpd makes request to server1 browser-to-httpd and httpd-to-server1 connections stay open as server1 pushes data server1 fails, so httpd-to-server1 connection fails mod_jk sees the original request is still open, so fails over to server2: httpd-to-server2 connection opened. browser is oblivious to this server2 sends a new cookie header browser isn't expecting more headers, so ignores that View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160333#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...