Op 25-4-2016 om 18:01 schreef Timo Sirainen:
On 25 Apr 2016, at 13:48, Tobi tobster@brain-force.ch wrote:
Hi list
I just realized that that I don not receive all mails in my mailbox (running dovecot-ee 2.2.23.1-1 on Debian 8). On my frontend servers (running postfix) the queue fills up with mails that cannot be delivered via lmtp to my backend servers. The error message on the frontend is "lost connection with backend while sending data" When I checked the logs on the backend server I found upon every delivery attempt kernel panics
Apr 25 12:33:36 mbox1 dovecot: lmtp(REDACTED): Panic: epoll_ctl(del, 18) failed: Bad file descriptor Apr 25 12:33:36 mbox1 dovecot: lmtp(REDACTED): Error: Raw backtrace: Can you get a core dump and gdb backtrace? See http://dovecot.org/bugreport.html#coredumps
/usr/lib/dovecot/libdovecot-sieve.so.0(program_client_run+0xe8) [0x7faa17d3b308] -> /usr/lib/dovecot/modules/sieve/lib90_sieve_extprograms_plugin.so(+0x45b8) [0x7faa15d855b8] -> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0x7c) [0x7faa17cfa2ac] ->
the weird thing is that this is not concerning all incoming mails. From time to time the frontends can deliver messages to my backends. I just tested it with a mail from work. It arrived via a frontend that has other mails in queue that could not be delivered so far.
Does anyone have an idea where I could look for the root cause of this panic messages? Looks like somehow caused by sieve extprograms.
Probably this bug:
https://git.dovecot.net/pigeonhole/core/commit/a95b0579b89c13fb3ee5700e76cbe...
Fixed for upcoming release.
Regards,
Stephan.