[kdepim-users] Strange data loss in Kmail

[Gölöncsér Attila]

Hi all

Sorry I forget to ask: is it a good way, deleting the indexes 
after every crash? 

Attila

Sunday 10 February 2008 dátummal Anne Wilson ezt írta:
> On Sunday 10 February 2008 18:58:06 Gölöncsér Attila wrote:
> > Hi all!
> >
> > I read some mailing lists, and I have some filters to sort
> > them to separate maildir folders. Yesterday I selected all
> > the mail in my inbox, and used the ctrl-j combination (apply
> > all filters). Kmail crashed on it.
> >
> > After restarting kmail all seemed in my inbox okay, but when
> > I clicked on a mail, all the headers disappeared, and turned
> > into "unknown" (see screenshot below.)
> >
> > Now I have only a lot of "unknown" messages, with these
> > headers:
> >
> > Status: RO
> > X-Status: RC (or RAC, RT)
> > X-KMail-EncryptionState: N
> > X-KMail-SignatureState: N
> > X-KMail-MDN-Sent:
> >
> > The count and the status of the messages is correct, but now
> > i have only a lot of empty messages in my maildir, whit only
> > these headers.
> >
> > Have you got an idea what was this?*
> >
> > Screenshot:
> > http://ybl-nte.uw.hu/temp/kmail.png
> >
> > $ kmail --version
> > Qt: 3.3.8
> > KDE: 3.5.8
> > KMail: 1.9.7
> >
> > $ uname -a
> > Linux 2.6.23-gentoo-r3 #1 SMP Thu Jan 3 13:28:24 CET 2008
> > i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux
>
> I'm sorry to say that you cannot recover those messages that
> are blank.  The problem starts with a corrupt index file.  If
> ever you see a blank, No Subject message, probably dated 1st
> January 1970, you know that you have got the corruption.  You
> should immediately close kmail.  If you click on any other
> message before you have done this it will also be lost.
>
> Navigate to the folder where you saw the problem and delete all
> the index files connected with that folder.  They will be
> recreated, and you will only have lost the one message.
>
> Sorry to be the bearer of bad news, but at least you know what
> to do if it happens again.  I have seen it several time, almost
> always following a crash. If you are going to bulk process
> messages as you described here, I suggest that you break the
> task into smaller numbers.  The number of messages that can
> safely be processed seems to vary between versions and distros.
>  I'd suggest that you start with 60.  If that is safe, try 100
> next.  You can increase until you get another crash.  Be on the
> lookout for a problem with the index files if it does crash, do
> the cleanup if necessary, then return to the last number that
> you found to be safe.
>
> Anne
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