Bug#684499: dovecot-core: Expunged messages continue to reappear

[Luca Capello]

Package: dovecot-core
Version: 1:2.1.7-2
Severity: normal
File: /usr/bin/dsync
Usertags: pca.it-synchronization

Hi there!

During the last month with dsync (see #680992), I discovered a very
nasty bug which actually renders dsync unusable for me.

Full log of various dsync calls is attached, here is a snippet:
=====
$ time dsync -v -k mirror mantissa-smd.pca.it
[...]
dsync-local(luca): Error: remote: dsync-remote(luca.capello): Warning: \
Maildir /home/luca.capello/Maildir/.lists.Debian.devel.general: \
Expunged message reappeared, giving a new UID (old uid=26466, \
file=1341791681.M57441P11093.mantissa:2,)
dsync-local(luca): Error: remote: dsync-remote(luca.capello): Warning: \
Maildir /home/luca.capello/Maildir/.lists.Debian.devel.general: \
Expunged message reappeared, giving a new UID (old uid=26467, \
file=1341791681.M57442P11093.mantissa:2,)
dsync-remote(luca.capello): Warning: \
Maildir /home/luca.capello/Maildir/.lists.Debian.devel.general: \
Expunged message reappeared, giving a new UID (old uid=26469, \
file=1341791681.M57444P11093.mantissa:2,)
dsync-remote(luca.capello): Warning: \
Maildir /home/luca.capello/Maildir/.lists.Debian.devel.general: \
Expunged message reappeared, giving a new UID (old uid=26470, \
file=1341791681.M57445P11093.mantissa:2,)
dsync-remote(luca.capello): Warning: \
Maildir /home/luca.capello/Maildir/.lists.Debian.devel.general: \
Expunged message reappeared, giving a new UID (old uid=26471, \
file=1341791681.M57446P11093.mantissa:2
dsync-local(luca): Error: remote: )

[some hours/days later]

$ time dsync -v -k mirror mantissa-smd.pca.it
[...]
dsync-local(luca): Info: support.Debian.Events: Couldn't keep all uids
dsync-local(luca): Error: msg-copy returned invalid input:
dsync-local(luca): Warning: Mailbox changes caused a desync. You may want to run dsync again.

real 1m12.632s
user 0m1.796s
sys 0m0.576s
=====

The master mailbox is kept synchronized with my primary laptop via dsync
and with another tablet via syncmaildir. However, I started to use the
latter after having experienced the dsync problem above.

Thx, bye,
Gismo / Luca

-- Package-specific info: