Locked Mailbox didn't unlock automatically

[Bubu]

Expected behavior

Mail accounts loads (eventually).

Actual behavior

After some recent update my mailbox didn't load anymore (since 2 weeks or so, I had no time to investigate inbetween). The logs perpetually showed the 409 "Mailbox is locked error". (yes, it didn't unlock for weeks, apparently?)

I ended up in #3159 and tried the troubleshooting steps there:

IMAP capabilities:
- AUTH
- ENABLE
- ID
- IDLE
- IMAP4REV1
- LITERAL+
- LOGIN-REFERRALS
- SASL-IR

Account has 85951 messages in 14 mailboxes

Trying sync it told me:

In MailboxLockedException.php line 33:
                              
  47 is already being synced  

it wasn't syncing in the background though, no new mails were being added.

I tried the --force option. That completed within a few seconds. Everything seems to be working now. I still wanted to report the issue.

Mail app

Mail app version: 1.9.5
Mailserver or service: dovecot 2.3.14

Server configuration

Operating system: Archlinux

Web server: Nginx

**Database:**Postgres

PHP version: 8.0.6

Nextcloud Version: 21.0.1

Client configuration

Browser: FF 88.0.1

Operating system: Archlinux

[miaulalala]

Hi Bubu, thanks for your report! We are aware of this and it will be fixed in the next release!

[Bubu]

Hi @miaulalala thanks for looking at this, could you link to the commit that fixed this?

[miaulalala]

#4812 is the main ticket we're working with and #4819 is the PR.