dovecot: auth-worker: Fatal: master: service(auth-worker): child XXXXX killed with signal 11

[Aki Tuomi]

> On May 26, 2017 at 3:26 PM dovecot at jeffandjessi.com wrote:
> 
> 
>  
> 
> Still Trying to track down a dovecot issue .... 
> 
> The error message is: 
> 
> dovecot: auth-worker: Fatal: master: service(auth-worker): child XXXXX
> killed with signal 11 (core not dumped - set service auth-worker {
> drop_priv_before_exec=yes }) 
> 
> The setup is dovecot 2.2.29.1 with passwd and mysql auth db's and a very
> basic config. 
> 
> both authentications work ... the symptom is that after a connection is
> made the auth worker loads and emails are downloaded and everything "is
> fine". However, about 30 second to a minute after the connection is done
> the process dies with the error message. Then the process starts all
> over with on the next checking of email ,but again everything "works"
> just seeing this error and the process dieing each time? 
> 
> enabled all extra verbose logging ,but nothing gives any clues.... 
> 
> Tried to enable core dumps ,but couldnt get core dumps to work ? 
> 
> The only thing is that a recently pkgsrc (netbsd) update create 2
> packages, one for dovecot and one for mysql plugin , sense then now this
> error appears. 
> 
> ,but it appears the .so lib files are installed and linked correctly. 
> 
> Double checked all file permissions and user permissions as well as
> chroot , etc, etc, ,etc.... 
> 
> cant seem to narrow this one down .... 
> 
> any ideas on trouble shooting would be great .... 
> 
> even tried running a trace with gdb -p on the process ,but it just dies
> with a signal 11 .... 
> 
> anybody have any ideas how to trouble shoot this or is this a bug in the
> software .... 
> 
> help !! 
>

Hi!

As mentioned before, your issue unfortunately cannot be solved without core dump. Please try https://www.dovecot.org/bugreport.html if doing all this allows you to get a core dump. Unfortunately there is no other solution at the moment, or some other way to debug this further.

Aki