sync_client fails to exit when manual replication and rolling replication are combined (2.3.16-8)

[Simpson, John R]

On Saturday, October 16, 2010 12:49 AM, Bron Gondwana wrote (2.3.16-8)
> 
> On Fri, Oct 15, 2010 at 03:42:21PM -0400, Simpson, John R wrote:
> > However, if I have run sync_client manually while rolling replication is
> enabled the rolling replication instance will not exit.  Instead, it
> appears to start spawning subprocesses and throwing database errors.  The
> change in database errors (below) appears to coincide with the completion
> of "Exporting cyrus-imapd databases".  The critical DB error messages
> continue until sync_client is killed.
> 
> [ ... ]
> 
> > Oct 15 14:51:41 eml-store04 sync_client[25333]: DBERROR db4: PANIC:
> fatal region error detected; run recovery
> > Oct 15 14:51:41 eml-store04 sync_client[25333]: DBERROR: critical
> database situation
> > Oct 15 14:51:41 eml-store04 sync_client[25353]: DBERROR db4: PANIC:
> fatal region error detected; run recovery
> > Oct 15 14:51:41 eml-store04 sync_client[25353]: DBERROR: critical
> database situation
> > ... continue until sync_client is killed ...
> 
> Nothing magic about sync_client itself here - it's something with the hand
> run sync_client and attaching/detaching from the environment.  This has
> been on the TODO list at FastMail for a while - and your information may
> actually help us narrow down the cause.  We don't use BDB, but the log
> messages annoy us too!

If there's else anything I can do to help track this down, please let me know.  It was interesting to see that the errors were coming from the original, rolling replication sync_client process, not a manually initiated sync_client that didn't exit properly.

The reason I'm running sync_client manually is to seed the replica with the existing users and mailboxes on the master server, as described in http://www.cyrusimap.org/docs/cyrus-imapd/2.3.16/install-replication.php.  Would it be better to use rsync?

Is there any reason not to add code to clean up any remaining sync_client processes to the "stop" function in /etc/rc.d/init.d/cyrus-imapd?

I am pretty sure we're not using BDB either, but I found a log file, /var/lib/imap/db/log.0000000001, that appears to be a Berkeley DB log file.  

Thank you,

John

> 
> Regards,
> 
> Bron.