On 25 Apr 2016, at 13:48, Tobi <tobs...@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.
