[Akonadi] [Bug 322471] New: After migration "resource id's don't match", high CPU use, inconsistencies

[Nicos Gollan]

https://bugs.kde.org/show_bug.cgi?id=322471

            Bug ID: 322471
           Summary: After migration "resource id's don't match", high CPU
                    use, inconsistencies
    Classification: Unclassified
           Product: Akonadi
           Version: 4.10
          Platform: Debian unstable
                OS: Linux
            Status: UNCONFIRMED
          Severity: grave
          Priority: NOR
         Component: Migration
          Assignee: kdepim-bugs at kde.org
          Reporter: gtdev at spearhead.de

After migrating an old KMail installation to Akonadi-based KMail 2, Akonadi
spins with high CPU load, spamming lines like

akonadi_maildispatcher_agent(3812)/libakonadi: Resource id's don't match: 
"akonadi_mixedmaildir_resource_0" "akonadi_maildir_resource_0" 

to the xsession-errors.

In this state, KMail also seems to become inconsistent with IMAP accounts,
meaning that deleting, moving, copying messages lead to the client showing
things that are in no way reflecting what was done on the server. "Moved"
messages turn out to be duplicated, and I don't even want to know if it always
greps the right ones.

This appears to be a long-standing issue, and it IMO means that KMail should
not be used since the desync means users are likely to lose data at some point.
There is also no way for a "normal" user to track down and diagnose that issue.

I propose that migration is completely disabled by default and users be told to
erase their configuration and start new, which appears to have a 50% chance of
working.

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