[Dovecot] director lmtp -> smtp problem

[Timo Sirainen]

On 15.3.2012, at 19.23, Jim Lawson wrote:

>> 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.
>> 
> Trying with v2.1.2 (peer is v2.0.18):
> 
> Mar 15 13:15:53 imapdir2 dovecot: director: Panic: file director.c: line
> 295 (director_sync): assertion failed: (!dir->ring_synced || (dir->left
> == NULL && dir->right == NULL))

This points to a more generic problem. How did this happen? You have two directors, stopped & upgraded one, started it up and it crashed?