[Bug 247889] New: KMail takes 99% CPU time when POP server is not accessible

[Andrey Borzenkov]

https://bugs.kde.org/show_bug.cgi?id=247889

           Summary: KMail takes 99% CPU time when POP server is not
                    accessible
           Product: kmail
           Version: 1.13.5
          Platform: Mandriva RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: pop3
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: arvidjaar at mail.ru


Version:           1.13.5 (using KDE 4.5.0) 
OS:                Linux

I use POP3 accounts on several mail servers. At least one of them is not very
reliable and relatively often has problems to access. When this happens, KMail
shows "Checking for new mail on ..." with 0% progress and CPU jumps to 99%; in
top list it is kmail process that consumes CPU. Stopping check for new mail
using "Abort Current Operation" immediately brings CPU consumption back to
normal.

Another case is resume from suspend. If system is suspended for a long time,
POP3 session is dropped by server, so kio_pop3 simply hangs there. In previous
(KDE) versions it just resulted in KMail missing new mails until kio_pop3
processes were killed. Now it triggers the same CPU hogging.

Reproducible: Sometimes

Steps to Reproduce:
Hard to do on purpose; needs to provoke network failure to access mail server.

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