Bron helped me track it down. Starting in Cyrus v2.4.13, there is a check to see if we're running on a standard Murder backend. If so, some code to update the mailbox list is skipped. The code was identifying a server as a backend server by checking for the presence of the "proxyservers" config variable. I had proxyservers set on my frontends (needlessly). Once I commented out proxyservers, the race condition was gone. Problem solved, and Bron committed a documentation fix to the imapd.conf manpage. Thanks, Andy On Wed, 12 Sep 2012, Andrew Morgan wrote: > I recently upgraded our Cyrus murder cluster from v2.4.12 to v2.4.16. > Since then, I have come across an interesting race condition. When > connected to a frontend server, if I create a mailbox and then immediately > try to select it, I will get an error message. > > Frontend IMAP telemetry: > > <1347491960<c34 create foo >> 1347491960>c34 OK Completed > <1347491960<c35 select foo >> 1347491960>c35 NO Mailbox does not exist > > if I wait a few seconds, it works: > > <1347491990<c37 create foo >> 1347491990>c37 OK Completed > <1347491994<c38 select foo >> 1347491994>* 0 EXISTS > * 0 RECENT > ... > > > When I connect to a backend server, I cannot reproduce this: > > <1347492147<c34 create foo >> 1347492147>c34 OK Completed > <1347492147<c35 select foo >> 1347492147>* 0 EXISTS > * 0 RECENT > ... > > > Is there some reason the frontend server doesn't know about the newly > created mailbox for a short period of time? > > This error happens everytime I attempt to postpone a message composition > in Alpine because it creates the "postponed-msgs" mailbox and then > immediately attempts to Append the message, which fails. > > I never saw this happen in v2.4.12. > > Thanks, > Andy > ---- > Cyrus Home Page: http://www.cyrusimap.org/ > List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ > To Unsubscribe: > https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus > ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
