[Akonadi] [Bug 318227] New: Data loss on restarting Akonadi to get it responsive again

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=318227

            Bug ID: 318227
           Summary: Data loss on restarting Akonadi to get it responsive
                    again
    Classification: Unclassified
           Product: Akonadi
           Version: 4.10
          Platform: Debian unstable
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: NOR
         Component: Birthdays Resource
          Assignee: kdepim-bugs at kde.org
          Reporter: Martin at Lichtvoll.de

After Akonadi / MySQL / Virtuoso used up 2 to 4 logical cores of a quite
capable Intel i5 Dualcore mobile CPU @ 2,5 GHz which this ThinkPad T520 can max
out to 3/3,2 GHz quite consistenly for minutes after I had it get recent mails
today, I thought restarting Akonadi would lead it to a sane state. In hindsight
I think this wasn´t such a good idea.

But well additionally to not working out, it led to data loss.

Reproducible: Didn't try

Steps to Reproduce:
I obviously haven´t tried to reproduce this, as I prefer that my mails are
safe. Tentative steps:

1.  Have a POP3 account with some mailing lists like kdepim-users and LKML or
so that it has some traffic.
2. Wait a night to mails to pile up.
3. Receive and filter new mails to some sub folders
4. Type akonadictl restart while Akonadi is working
Actual Results:  
martin at merkaba:~/.Mail/.Lichtvoll.directory/.KDE.directory/pim-users-ml/cur> 
grep "KMail not updating source folders" *
1365696861.R215.merkaba:2,RS:Subject: [kdepim-users] KMail not updating 
source folders on move operations
1365697032.R861.merkaba:2,S:Subject: Re: [kdepim-users] KMail not updating 
source folders on move

While there has been an answer to my question that appeared at first, but was
not there after the Akonadi restart anymore:

http://lists.kde.org/?l=kdepim-users&m=136574390903236&w=2

Expected Results:  
That answer would still be there locally and displayed just fine in KMail.

On akonadictl restart Akonadi complained it could not delete some mails via
popup notice. Unfortunately these error messages are not in ~/.xsession-errors.
And I cannot access them from systray anymore as well.

I try to dig out relevant parts of ~/.xsession-errors and attach these.

PS: KMail updates source folders now, so at least that seems settled for now.

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