[Akonadi] [Bug 404538] New: akonadi fails with "multiple merge candidates" after failed IMAP sync

Jens bugzilla_noreply at kde.org
Mon Feb 18 22:04:21 GMT 2019


https://bugs.kde.org/show_bug.cgi?id=404538

            Bug ID: 404538
           Summary: akonadi fails with "multiple merge candidates" after
                    failed IMAP sync
           Product: Akonadi
           Version: unspecified
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: server
          Assignee: kdepim-bugs at kde.org
          Reporter: jens-bugs.kde.org at spamfreemail.de
  Target Milestone: ---

Using KDE Neon with all updates applied, based on Ubuntu 18.04.

For the last few weeks, Kontact has not been updating its mails any more and I
only see "retrieving folder contents ..." in the messages window.
I tracked this down to an Akonadi issue where - it seems - an IMAP remotely
stored mail was deleted twice. Something in the mail database has gotten out of
sync, and Akonadi is not clever enough to fix it.

I'm going back to Thunderbird for now. Despite KMail definitively being the
better mail app.

Sorry, gals 'n' guys.
I went from Ubuntu to KDE Neon because I found KDE is by far the better desktop
experience now that Unity is going (I liked Unity).
I tried Kontact/KDE and was surprised what features it had compared to my
Thunderbird/Lightning/SOGO setup with Caldav and Carddav.

It worked great at first, maybe except for the weak HTML support in the mail
editor (especially when replying).

Then KMail started stalling when fetching mail, mostly after resuming from
sleep mode, or when cleaning up inboxes with a lot of moving and deleting
email.
Some research pointed me to the Akonadi framework running in the background,
and a ~2GB MySQL database in .local/share/akonadi acting as "cache" for all my
mails.

And this "cache" kept breaking on me. "akonadictl restart" on the console spew
thousands of "multiple merge candidates" and "lock time exceeded" errors, which
appeared again and again regardless how often I deleted my whole KDE setup and
configured everything from scratch.

Thunderbird is clunkier, not as nice, not as fast.
But it *works*.
I have never lost email. It can find the right email quickly with the global
search feature and "drill down" options.
Whatever local database it has, it doesn't break on me and doesn't create
duplicate or missing emails.
It uses about a third of the memory that Kontact + Akonadi + the mandatory
MySQL server uses, and does not create *yet* another cache copy of my emails.

Please close this bug only after Akonadi has been made either significantly
more robust or replaced by something more robust.

I will stay with KDE, and I will keep my Akonadi configuration, so if there are
follow-up questions, I'm happy to answer and do some research to help fix this.

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