As it happens this server is currently holding 63k open connections on the port that LS is listening on. There are only about 150 clients though. This is the server we have had problems with before, where "something" causes the clients to open lots and lots of connections until it all dies.

The original issue was thought to be solved - a XHR bug in the client code that Mone fixed. This must be something different.

I have restarted the server, but the connections are all still hanging around with a status of "Close-wait" or "Last-ACK".