what's your output of ulimit -n? (assuming you start it with the appropriate user)
@Mark - The limit is big(16k), so the too many files error is not reached easily, but it could be reached in time.
The version is 7.1.2. But isnt' this a problem of the jboss-remote-naming jar?
LATER EDIT: My mistake, I was using 1.0.3. In 1.0.5 the bug is fixed