[Akonadi] [Bug 391286] New: inbox synced again and again when with kmail bogofilter filter rules enabled on laptop & desktop

[Achim Bohnet]

https://bugs.kde.org/show_bug.cgi?id=391286

            Bug ID: 391286
           Summary: inbox synced again and again when with kmail
                    bogofilter filter rules enabled on laptop & desktop
           Product: Akonadi
           Version: 5.7.2
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Mail Filter Agent
          Assignee: kdepim-bugs at kde.org
          Reporter: ach at mpe.mpg.de
  Target Milestone: ---

With Neon User on my laptop and desktop: kmail accesses via imap and dovecot
server the same account. Both kmail instances have only the 4 bogofilter rules
generated by the  antispam wizard.  

When both kmail instances are running and I receive a new e-mail,  the same
e-mail is listed multiple times in the msg listview and akonadi scans the inbox
again and again.  Each scan ~ 4 sec and CPU fan kicks in because akonadi
consumes lot of CPU.   The scan loop stops after more than one or two duzend
scans (guess).  The mesg list view shows 2 times the same unread msg.  This
happens on both the laptop and desktop in parallel.

After each scan the msg switches most of the time between listed twice and four
time.  Sometimes it's listed 3 times.  When  it eventually after 1 -2 minutes
ends I see the new msg listed twice.

At the same time the unread mail count changes again and again in kmail/inbox,
thunderbold, K9-Mailon Android and Apple Mail and I can enjoy lots of
notification sounds  ;-)

When I disable the all rules (=4 bogofilter rules) on the laptop.  I don't see
the duplicates but nevertheless my laptop does one complete sync the inbox as
shown in the msgbox in the lower right of kmail which takes ~ 4 sec.


I've seen this in the past already (> year) but most of the time I used
bogofilter filter rules only on the desktop host.

Achim

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