[Dovecot] pop3-login: Fatal: io_loop_handle_add: epoll_ctl(1, 5):

[Brandon Davidson]

We've had this reoccur twice this week. In both cases, it seems to hit a
swath of machines all within a few minutes. For some reason it's been
limited to the master serving pop3 only. In all cases, the logging
socket at fd 5 had gone missing.

I haven't applied the fd leak detection patch, but I do have lsof output
and a core file available here:
http://uoregon.edu/~brandond/dovecot-1.2.6/

Timo, is there anything else I can collect to assist in debugging this?
I'd rather not go back to 1.2.4, but my coworkers are becoming annoyed
at having to restart the master processes every few days.

-Brad