[Kde-pim] Phantom akonadi IMAP resources

[Jörg Schaible]

Hello,

today my KMail 4.7.4 messed up my box. It started when I had to realize that 
Kontact suddenly claimed most of the available memory and my machine hardly 
responded to my actions because of extensive swapping. I had to kill the 
process to get into normal state again. Starting KMail alone gave proof that 
it cause the problem.

However, now I had the problem, that after launching it started always 
immediately to allocate a lot of memory within a few seconds and the machine 
got totally unresponsive.

As next action I deleted the IMAP resource in akonadi_control, since I have 
all my 50000 mails on the server (actually I could delete also the local 
folder). I started KMail, the IMAP resource was gone, it behaved normally 
and I closed it again.

Then I recreated the IMAP resource from scratch in akonadi_control again, 
started KMail and it seemed to work at first glance, I closed it and started 
Kontact. But it started suddenly to consume my memory again and crashed. 
Starting KMail again as standalone application showed that the problem was 
occurring again, but this time I also got a second process 
"akonadi_imap_resource" behaving the same (allocating more than 2GB of 
memory). I killed KMail and restarted akonadi.

I recreated the IMAP resource again to see if the effect on KMail as 
standalone app is again gone, but this time KMail started with the memory 
waste quite immediately followed by a crash after allocating more than 4GB 
within a few seconds. Everytime.

As next action I deleted the IMAP resource again, stopped akonadi and 
removed any trace of an imap resource in ~/.kde4/share/config/ and 
~/.config/akonadi. After restarting akonadi and KMail I have now the weird 
situation that KMail shows me now the IMAP server two times in the left 
pane, but neither in KMail's settings nor in akonadi_control is any IMAP 
resource visible. KMail cannot resync any of the mail folders (according the 
error message on the console), but can access the already available mails 
like on offline mode.

How can I clean this up without losing all my akonadi calendar and contact 
resources? Akonadi uses an external MySQL DB. Where does KMail get the info 
about those deleted IMAP resources and how can I get rid of them? Anybody 
else facing this memory hog?

- Jörg



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