> Please check your network settings. Can it be that you limited the number of
> sockets that can be opened to the server?

The max number of fd's on the system:
$ cat /proc/sys/fs/file-max
$ 209536

The max number of fd's per process:
$ ulimit -n
$ 1024

One of our JBoss applications has 25 databases. Assuming that
5 connections for each database were establshed, the number of
fd's required is 5 * 25 = 125, which is much less than 1024.

Though I don't know how many fd's Firebird SS requires per database,
I guess that 1024 is large enough for this JBoss application.

Regards,

K Kumakura