[editor: moving to the appropriate forum…]
If cometd server gets restarted or client loses internet connection till his session expires, then on next message submit inside chat room, server responds with:
dojo.io.script.jsonp_dojoIoScript12._jsonpCallback([{"successful":false,"error":"402::Unknown client","advice":{"reconnect":"handshake","interval":500},"channel":"/chat/1"}])
