In server, We can see most of disconnect event? it cause client can't receive message

[Dale2012]

In server, We can see most of disconnect event? it cause client can't receive message.

Why cause most of disconnect event?

[Dale2012]

[2013-08-20 13:54:01] INFO [ SUBSCRIBE] v2u6vn1c0l3fx19cr9aa0ep0rbd1wtzj5z0 -> /SHOW_UCLOUD_CHANNEL_97bhk8
[app out (l2182)] [2013-08-20 13:54:01] INFO [UNSUBSCRIBE] ul8k4a0gqpocy1ogktyx0goa3s91cl1jfl1 -> /SHOW_UCLOUD_CHANNEL_gvp67j
[app out (l2183)] [
[app out (l2184)] [2013-08-20 13:54:01] INFO [UNSUBSCRIBE] 3r474g17l9kw404cjvpd12qu6ve00iwlhc0 -> /SHOW_UCLOUD_CHANNEL_cvpy97
[app out (l2185)] [
[app out (l2186)] [2013-08-20 13:54:01] INFO [UNSUBSCRIBE] nm7khu1l5xi2b1513eym1f4hlly1zgs2fr1 -> /SHOW_UCLOUD_CHANNEL_gvp67j
[app out (l2187)] [
[app out (l2188)] [2013-08-20 13:54:01] INFO [ DISCONNECT] ul8k4a0gqpocy1ogktyx0goa3s91cl1jfl1
[app out (l2189)] [2013-08-20 13:54:01] INFO [ DISCONNECT] 3r474g17l9kw404cjvpd12qu6ve00iwlhc0
[app out (l2190)] [2013-08-20 13:54:01] INFO [ DISCONNECT] nm7khu1l5xi2b1513eym1f4hlly1zgs2fr1