[Dovecot] director lmtp -> smtp problem

[Timo Sirainen]

On Thu, 2012-03-15 at 07:50 -0400, Jim Lawson wrote:
> On 3/15/12 6:02 AM, Timo Sirainen wrote:
> > Hi,
> >
> > On 15.3.2012, at 3.24, Jim Lawson wrote:
> >> We have a 2-node director setup which front-ends for 4 nodes which share
> >> a clustered filesystem (GFS).  All nodes run Dovecot 2.0.18. 
> > ..
> >> Mar 14 20:40:38 imapdir2 dovecot: lmtp(10692): Panic: file
> >> lmtp-proxy.c: line 376 (lmtp_proxy_output_timeout): assertion failed:
> >> (proxy->data_input
> >> ->eof)
> > I pretty much rewrote the LMTP proxying code in v2.1, so there's a very good chance that it's already been fixed.
> >
> I'll give it a shot.  For the purposes of doing a rolling upgrade, is it
> reasonable to expect a 2.0.18 director to peer with a 2.1.1 director for
> the duration, or should I split-brain them during the upgrade?

I'm almost certain that v2.1.1 talks compatible protocol with v2.0. The
current hg version has some extra features, but it doesn't use them
until all of the directors have upgraded to the new version.