xfer problems between 2.3.15 and 2.4.17

[Gavin Gray]

All we see is the request from the client to subscrobe to the newly created folder failing for the reason that, the mailbox does not exist. we get this from logging the client's imap session. 
thanks,

Gavin

Quoting Dave McMurtrie <dave64 at andrew.cmu.edu> on Thu, 5 Jun 2014 16:18:16 +0000:

> On Thu, 2014-06-05 at 16:15 +0100, gavin.gray at ed.ac.uk wrote:
>> As you may be aware we are attempting this and have run into various
>> problems.
>>
>> Currently we have a mixed murder of 2.3.15 backends and 2.4.17 backends.
>> We are now fairly confident that we can xfer accounts succesfully between
>> these backends. The problems we had appear to have been with a very small
>> number of accounts on our older backends that had corrupt cyrus.index
>> files.
>>
>> However we are now having trouble configuring frontends that will work
>> with this mixed murder environment while we xfer our users accross.
>>
>> If we use our existing 2.3.15 frontends then users have who have been
>> migrated lose the ability to see other accounts in the "Other Users" name
>> space.
>>
>> On the other hand if we introduce 2.4.17 frontends then we see strange
>> behaviour around folder creation. Clients can create the folders but
>> autosubscription fails with the client being told the new folder doesn't
>> exist. If one waits a minute or two one can manually subscribe to the
>> folder.
>>
>> So far we have not upgraded the mupdate master. Is this a mistake?
>>
>> In terms of the frontend config we have added
>>
>> suppress_capabilities: ESEARCH QRESYNC WITHIN XLIST LIST-EXTENDED
>>
>> to the 2.4.17 frontends, otherwise the config is identical to our 2.3.15
>> frontends. Is there any other config changes we should be aware of?
>>
>> any ideas greatly appreciated...
>
> What you're doing should work just fine.  It's exactly what we did to
> migrate our murder environment from 2.3.x to 2.4.x.  I think I posted to
> the info-cyrus list about how we upgraded, but maybe I didn't.  I got
> all the 2.4 backend servers built and ready to go, then I upgraded all
> the frontends to 2.4, then I used XFER to move all the mail from 2.3 to
> 2.4 servers.  I don't recall exactly when I upgraded our mupdate server,
> but I don't think it matters.  I don't believe anything changed in
> mupdate protocol or in the mailbox.db format between 2.3 and 2.4.
>
> Have you tried grabbing telemetry on the 2.4 server when the
> subscription fails?  Is there anything being logged?
>
> Thanks!
>
> Dave
>

  

-- 
Gavin Gray
Edinburgh University Information Services
Rm 2013 JCMB
Kings Buildings
Edinburgh
EH9 3JZ
UK
tel +44 (0)131 650 5987
email gavin.gray at ed.ac.uk

--
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Scotland, with registration number SC005336.

-- 
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
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