[Dovecot] Fatal: listen(143) failed: Interrupted system call

[Sandro Tosi]

Hello,
we found dovecot down on one of our servers, with this error in the log:

dovecot: 2009-07-14 04:05:04 Warning: SIGHUP received - reloading
configuration
dovecot: 2009-07-14 04:05:04 Error: Temporary failure in creating login
processes, slowing down for now
dovecot: 2009-07-14 04:05:04 Fatal: listen(143) failed: Interrupted
system call

we can reproduce this error with this tight loop:

while date ; do kill -HUP $(cat /var/run/dovecot/master.pid) ; sleep 15s
; done

after a while dovecot dies with the above error message.

We are using

# dovecot --version
1.0.15

in particular, Debian package with version "1:1.0.15-2.3" .

This started since yesterday, when we upgraded to the latest Debian
Lenny point release.

The situation is rather problematic, and we'd like to here from you if
there something we can do to fix it; if there's something you'd like us
to do, just ask :)

Thanks in advance,
Sandro