[Dovecot] dsync-2.2.2 incorrectly synchronizes subscription status of deleted mailbox

[Karol Jurak]

Hi,

It seems that dsync-2.2.2 doesn't correctly synchronize subscription status
of a deleted mailbox. The situation is as follows.

There are two servers: A and B, and a test user test_mdbox. Mailboxes 
(mdbox) of
this user on both servers are synchronized. Specifically on both of them 
there is
a Trash/x mailbox. Replication plugin is disabled.

I delete Thrash/x mailbox on A with Thunderbird. The relevant IMAP 
commands issued
are:

71    87.068176    10.4.0.13    10.1.107.144    IMAP    Request: 9 
delete "Trash/x"
72    87.072238    10.1.107.144    10.4.0.13    IMAP    Response: 9 OK 
Delete completed.
73    87.073736    10.4.0.13    10.1.107.144    IMAP    Request: 10 
unsubscribe "Trash/x"
74    87.085263    10.1.107.144    10.4.0.13    IMAP    Response: 10 OK 
Unsubscribe completed.

Inspecting output of 'doveadm mailbox list' and contents of 
subscriptions file
shows that everything is as expected, ie. mailbox was deleted and 
unsubscribed. Moreover
in dovecot.mailbox.log on A the following records appear:

#480: delete-mailbox 3f3eb117a51c9a51d8280000f671379f (2013-05-20 14:54:40)
#504: delete-dir f91e44cab57821aa456b525c7a2f1d7e (2013-05-20 14:54:40)
#528: unsubscribe f91e44cab57821aa456b525c7a2f1d7e (2013-05-20 14:54:40)

Subsequently I run 'doveadm sync -u test_mdbox -d'. It causes an entry 
for Thrash/x
to reappear in subscriptions file on both servers and the following 
records are
appended to dovecot.mailbox.log on B:

#2112: delete-mailbox 3f3eb117a51c9a51d8280000f671379f (2013-05-20 14:55:49)
#2136: delete-dir f91e44cab57821aa456b525c7a2f1d7e (2013-05-20 14:55:49)

On A this record is added:

#552: subscribe f91e44cab57821aa456b525c7a2f1d7e (2013-05-20 14:55:49)

So, in described situation, dsync subscribes a mailbox on a server it 
was deleted on
instead of unsubscribing it on the other one.

-- 
Karol Jurak