dovecot - Apr 2015 - FYI: Some 'fun' unlinks with random memory space references

Hola,

Dovecot: 2.2.16 (6bde7868cffd)
That is the rename-it 2:2.2.16-1~auto+43 edition.

In the beginning of syncing it caused scary things like:

Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(OX/dbox-Mails/u.10672) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(ox/mailboxes/INBOX/dbox-Mails/u.10927) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(OX/dbox-Mails/u.10839) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(OX/dbox-Mails/u.10656) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error: unlink(11147)
failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(OX/dbox-Mails/u.10637) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(OX/dbox-Mails/u.10807) failed: No such file or directory

Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(<80><A5><C8>) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(<B0><A6><C8>) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(<E0><A7><C8>) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(#020<A9><C8>) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(@<AA><C8>) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(p<AB><C8>) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error:
unlink(<A0><AC><C8>) failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error: unlink(?<C8>)
failed: No such file or directory
Apr  9 16:24:08 mail dovecot: dsync-server(username): Error: unlink() failed: No
such file or directory


Might want to put a check before that unlink that nothing dirty is in the
buffer...

I would not be surprised if this was related to a broken index, as the other
side effect I saw during this sync was an ever-expanding maildir (read: sdbox),
multiplying itself during sync, keeping large amounts of the the
.temp.<xxxx> in the dir, never moving them to a final directory.

That was resolved by stopping dovecot, then deleting the broken sdbox
(backups++) and performing a 'dovecot force-resync -u user Folder' on
the source.

Maybe there was a race somewhere while syncing the large amount of data over;
seems that everything is okay now though.

Greets,
 Jeroen