[kmail2] [Bug 316107] New: big regression: kmail IMAP connection and message display problems

[Marc Schiffbauer]

https://bugs.kde.org/show_bug.cgi?id=316107

            Bug ID: 316107
           Summary: big regression: kmail IMAP connection and message
                    display problems
    Classification: Unclassified
           Product: kmail2
           Version: 4.10
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: mschiff at gentoo.org

(I use current 4.10 branch of kdepim)

I guess somewhere between 4.10-beta and 4.10.0 some severe connection problems
have been introduced for IMAP resources.
It seems existing imap connections will not be reused which leads to many open
IMAP connections until the server refuses new connections.

I use kmail to read IMAP mail from a dovecot server which allows a max of 10
concurrent user+ip connections in default config.
I now often get a popup message showing a dovecot error message that this
connection limit is exceeded.

Increasing this limit to 20 later 30 did not help!

I also noticed that since some weeks (three or so) kmail often takes a lot of
time to show a message that has been selected in the message list. It takes
around 10-20 seconds until a message is actually shown very often. I guess this
is due to the connection problem also...

Today it was even worse: kmail again hit the connection limit (30 connections)
and the imap resource has been set to Offline by kmail. Then I set it back
online via "File->Work Offline, then File->work online which lead to a LOOP in
which IMAP-resource messages were popping up as fast as possible telling me
about the connection problem and my system was getting slower and slower....
It did not stop opening new popup messages and I had to manually kill -9 kmail
to not let my whole system die...





Reproducible: Always

Steps to Reproduce:
please see above. AKonadi is version 1.9.0, kdepim is current 4.10 branch

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