On 9.6.2014, at 20.49, Andy Dills <a...@xecu.net> wrote: >>> Has anybody noticed Outlook 2007 & 2010 (but apparently not 2013) hanging >>> IMAP connections with Dovecot v2.2 (but not v2.1) when they're FETCHing >>> large mails? I can't think of any reasonable explanation for this. >> >> Most likely solved by: http://hg.dovecot.org/dovecot-2.2/rev/6a9508d28d34 [1] >> >> Strange that it didn't break more commonly or that more people weren't >> complaining about it.. The bug has been there since v2.2.7. > > Thank you Timo. This patch did indeed correct the problem, we had no > problem doing full syncs with the problematic accounts after > implementing this. > > Is it perhaps something that only happens with directory/proxy > environments? I'm surprised it hasn't been mentioned before, I figured > it was something particular to our implementation since nobody else was > mentioning it, until you did. > > Fascinating to me that it only affects Outlook as well. I don't > understand the code well enough to grasp the impact of the bug, so if > somebody has a minute to share an explanation that would be cool.
Only happened when using Dovecot proxy. Only happened if client sent a command while another long running command was already sending data. So basically if Outlook started downloading a large mail on background and user clicked another mail, the already running FETCH was stopped because Outlook sent another FETCH command to the same connection. I guess Outlook was the only client to do that.
