Errors after freebsd upgrade

Odhiambo Washington odhiambo at
Mon Nov 1 13:27:12 EET 2021

On Sat, Oct 30, 2021 at 7:10 PM Hanns Mattes <hanns at> wrote:

> Hi,
> after upgrading Freebsd from ports dovecot is throwing the following error
> Oct 30 18:04:15 freebsd dovecot[59232]:
> doveadm(xxx at<84061><S3CoJf9sfWFdSAEAUmejdw>: Fatal: master:
> service(doveadm): child 84061 killed with signal 6 (core not dumped -
> - set service doveadm {
> drop_priv_before_exec=yes })
> I (surely) may have missed something while upgrading (I've learned a lot
> about backup/snapshot-strategies with zfs, but to late to apply).
> How can I debug the erro?
> Regards Hanns

The "service doveadm { drop_priv_before_exec=yes }" bit should go into
Append the bit I have quoted into that file and then restart dovecot.

What command is it that you are running with doveadm?

The also run the following commands (as root):

sysctl -w kern.sugid_coredump=1
sysctl -w kern.corefile=/var/coredumps/%U.%N.core

mkdir /var/coredumps
chown -R 1777 /var/coredumps

The next time  you get that fatal error, you'll probably find a file in

You can then obtain a backtrace from it:

gdb /usr/local/bin/doveadm /var/coredumps/FILENAME <ENTER>
bt full <ENTER>

Present the output, together with that from 'doveconf -n'.


Best regards,
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft.", egrep -v '^$|^.*#' :-)
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