[Bug 279380] New: akonadi_mixedmaildir_resource crashes when synchronizing a folder with a large number of emails

[Shane O'Donnell]

https://bugs.kde.org/show_bug.cgi?id=279380

           Summary: akonadi_mixedmaildir_resource crashes when
                    synchronizing a folder with a large number of emails
           Product: Akonadi
           Version: 4.7
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: Mixed Maildir resource
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: shane at sto-lat.co.uk
                CC: kevin.krammer at gmx.at


Version:           4.7 (using KDE 4.7.0) 
OS:                Linux

Synchronizing a folder with a large number, in this case 107000+, of emails
within it consumes a vast amount of memory and then crashes with a sigabrt.

This happens when either clicking on the folder causing a synchronisation and
when starting kmail.

Reproducible: Always

Steps to Reproduce:
Click on folder with large number of emails (lower limit not known, but 107000+
mails causes the problem and folders with just under 50000 do not)
Synchronization starts


Actual Results:  
akonadi_mixedmaildir_resource crashes

Expected Results:  
Folder synchronizes and displays emails.

i686 AMD Athlon(tm) XP 2500+ AuthenticAMD GNU/Linux

Under top the process has consumed 3054M, under the VIRT column, of memory on a
machine with 3G memory + 2.8G swap.  I added a 10G swapfile but there was no
change to the problem.

The maildir folder contains 107538 emails using 1.9G of disk space.
Other folders of up to 47800 emails do not cause the problem.

Whilst it is probably useless here is the backtrace.

Application: Akonadi Resource (akonadi_mixedmaildir_resource), signal: Aborted
[KCrash Handler]
#7  0xffffe424 in __kernel_vsyscall ()
#8  0x44421681 in raise () from /lib/libc.so.6
#9  0x44422e63 in abort () from /lib/libc.so.6
#10 0xbfa59490 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

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