On Aug 26, 2013, at 10:27 AM, Ralf Buschermöhle wrote:

> These are just the running nodes. Previously there have been a few thousand connections from a cluster (handled successfully).

Some more.  Try executing the following command on your BSD box to see how many sockets and files (combined) you can have open at one time:

	sysctl kern.maxfilesperproc

On my Mac (a BSD box) I get around 10K.

I wonder if ECJ isn't properly closing the sockets, and so you're hitting a socket limit by repeatedly adding and removing clients.  It looks correct to me though.

Sean