[Dovecot] 2.0.5 Error: Timeout waiting for handshake from auth server.

[Timo Sirainen]

On Fri, 2010-10-22 at 17:49 +0300, Veiko Kukk wrote:

> Oct 22 17:45:24 config: Warning: service auth { client_limit=4096 } is 
> lower than required under max. load (4896)
> Oct 22 17:45:24 master: Error: service(auth): child 15857 killed with 
> signal 11 (core dumps disabled)

Well, this is the reason. It crashes. gdb backtrace would be helpful in
solving this.

You should be able to get a core dump by:

1. Set:

service auth {
  user = root
}

2. Run "ulimit -c unlimited" before starting Dovecot. If it still says
"core dumps disabled" in the log file, it means that your init script
disabled them again. Then you could e.g. just run "dovecot" directly
without init script.

You can then get gdb backtrace with:

gdb /usr/local/libexec/dovecot/auth /var/run/dovecot/core
bt full

If there are any problems, http://dovecot.org/bugreport.html may be
helpful.