Replicated RENAME leaves "empty" entry in mailboxes.db

[Sebastian Hagedorn]

Hi,

I asked this question on IRC yesterday, but I didn't get any response.
Maybe someone here knows?

[4:08pm] hagedose: Is it expected behavior that a replicated RENAME leaves
an „empy“ mboxlist entry?
[4:08pm] hagedose: We’re experimenting with replication from a 2.4.20
server to a 3.0.5 server.
[4:09pm] hagedose: We used sync_client -u to replicate a user, then deleted
a mailbox on the master and synced again, to find out if the delet would be
sent to the replica.
[4:10pm] hagedose: It is sent: „APPLY RENAME %(OLDMBOXNAME
user.testuser-clotho1.diesisteintest NEWMBOXNAME
DELETED.user.testuser-clotho1.diesisteintest.5A8D8932 PARTITION imap2“
[4:10pm] hagedose: On the master the original mailbox doesn’t appear in
ctl_mboxlist -d, but on the replica it looks like this now:
[4:11pm] hagedose: user.testuser-clotho1.diesisteintest 16 (null)
[4:12pm] hagedose: I’m not sure if that is harmless or not?!

FWIW, when I do an IMAP LIST for that account, the mailbox with the
"(null)" partition is not listed. So I guess it's just cosmetic, but I'd
like to be sure it won't cause problems down the road.

[ellie timoney]

Hi,

Post by Sebastian Hagedorn
[4:11pm] hagedose: user.testuser-clotho1.diesisteintest 16 (null)

This sounds like it's the tombstone entry for the deleted mailbox (i.e. a record that there used to be a mailbox with that name). I believe tombstones are relatively new, in which case the master server might not have one just because it's an older build. Off the top of my head I'm not sure what version they appeared in, but I think ~2.5.

I might be totally wrong here. My understanding how tombstones appear to administrators is pretty woolly/nonexistent, so I'm guessing. Hoping someone more familiar with these can chime in.

We don't really seem to have any documentation about them, so that would be a good thing to put together. I've raised https://github.com/cyrusimap/cyrus-imapd/issues/2265 for this, so we don't forget to do it :)

Cheers,

ellie

Post by Sebastian Hagedorn
Hi,
I asked this question on IRC yesterday, but I didn't get any response.
Maybe someone here knows?
[4:08pm] hagedose: Is it expected behavior that a replicated RENAME leaves
an „empy“ mboxlist entry?
[4:08pm] hagedose: We’re experimenting with replication from a 2.4.20
server to a 3.0.5 server.
[4:09pm] hagedose: We used sync_client -u to replicate a user, then deleted
a mailbox on the master and synced again, to find out if the delet would be
sent to the replica.
[4:10pm] hagedose: It is sent: „APPLY RENAME %(OLDMBOXNAME
user.testuser-clotho1.diesisteintest NEWMBOXNAME
DELETED.user.testuser-clotho1.diesisteintest.5A8D8932 PARTITION imap2“
[4:10pm] hagedose: On the master the original mailbox doesn’t appear in
[4:11pm] hagedose: user.testuser-clotho1.diesisteintest 16 (null)
[4:12pm] hagedose: I’m not sure if that is harmless or not?!
FWIW, when I do an IMAP LIST for that account, the mailbox with the
"(null)" partition is not listed. So I guess it's just cosmetic, but I'd
like to be sure it won't cause problems down the road.
--
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.:.Regionales Rechenzentrum (RRZK).:.
.:.Universität zu Köln / Cologne University - ✆ [phone].:.
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[Sebastian Hagedorn]

Hi,

Post by ellie timoney

Post by Sebastian Hagedorn
[4:11pm] hagedose: user.testuser-clotho1.diesisteintest 16 (null)

This sounds like it's the tombstone entry for the deleted mailbox (i.e. a
record that there used to be a mailbox with that name). I believe
tombstones are relatively new, in which case the master server might not
have one just because it's an older build. Off the top of my head I'm
not sure what version they appeared in, but I think ~2.5.

that explanation makes a lot of sense. Thanks.

Post by ellie timoney
I might be totally wrong here. My understanding how tombstones appear to
administrators is pretty woolly/nonexistent, so I'm guessing. Hoping
someone more familiar with these can chime in.
We don't really seem to have any documentation about them, so that would
be a good thing to put together. I've raised
https://github.com/cyrusimap/cyrus-imapd/issues/2265 for this, so we
don't forget to do it :)

Thank you!
--
Sebastian Hagedorn - Weyertal 121, Zimmer 2.02
Regionales Rechenzentrum (RRZK)
UniversitÀt zu Köln / Cologne University - Tel. [phone]