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

[Marco Nenciarini]

Timo Sirainen ha scritto:
> 
> That's the pty's fd I think, probably from dovecot --exec-mail because
> normally dovecot master process closes them at startup..
> 
> Did you check if two "dovecot" processes were running when this
> happened?

This morning the problem showed again.

This is what I was able to discover:

1) There was only one master process.
2) Imap and managesieve login and worker processes were working normally.
3) There was no pop3/pop3-login.

After the last time I've modified my root crontab to execute the 
expire-tool every minute, trying to trigger the problem in another time 
of the day, but the first failure is

Oct  6 06:26:02 delta01 dovecot: imap-login: Panic: Leaked file fd 5: 
dev 0.12 inode 1005
Oct  6 06:26:02 delta01 dovecot: dovecot: Temporary failure in creating 
login processes, slowing down for now
Oct  6 06:26:02 delta01 dovecot: dovecot: child 21216 (login) killed 
with signal 6 (core dumps disabled)

As you can see this time is the login process of an imap connection, so 
I can state that the problem is not related to pop3 and nor to expire 
plugin.

Probably the imap connections that I see were there before the problem 
was triggered.

So the only remaining thing in daily log rotation that can be the 
trigger of the problem is the heavy cpu/io load due to daily maintenance.

The last weird thing is that this time I have simply asked dovecot to 
reload its configuration and the problem is vanished.

I hope this is enough to figure out what was happened.

Marco

-- 
---------------------------------------------------------------------
|    Marco Nenciarini    | Debian/GNU Linux Developer - Plug Member |
| mnencia at prato.linux.it | http://www.prato.linux.it/~mnencia       |
---------------------------------------------------------------------
Key fingerprint = FED9 69C7 9E67 21F5 7D95  5270 6864 730D F095 E5E4