Bug 233216 - kopete hangs in FUTEX_WAIT_PRIVATE
Summary: kopete hangs in FUTEX_WAIT_PRIVATE
Status: RESOLVED WORKSFORME
Alias: None
Product: kdepimlibs
Classification: Applications
Component: kabc (show other bugs)
Version: 4.4
Platform: Gentoo Packages Linux
: NOR normal
Target Milestone: ---
Assignee: kdepim bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-04-04 00:15 UTC by Kai Krakow
Modified: 2010-09-18 14:16 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed In:

Attachments
GDB backtrace of kopete hanging in futex (6.47 KB, text/plain)
2010-04-04 00:16 UTC, Kai Krakow 		Details
Another hang (6.47 KB, text/plain)
2010-04-05 13:48 UTC, Kai Krakow 		Details
Another backtrace, gdb directly attached without interrupting kopete (v4.4.5) (17.26 KB, text/plain)
2010-07-20 22:29 UTC, Kai Krakow 		Details
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Description Kai Krakow 2010-04-04 00:15:11 UTC 
Version:            (using KDE 4.4.2)
Compiler:          gcc-Version 4.3.4 (Gentoo 4.3.4 p1.0, pie-10.1.5) 
OS:                Linux
Installed from:    Gentoo Packages

When I leave kopete idle for a long time (read: not actively using it), kopete freezes and can only be killed. Stracing the process shows that kopete is hanging in a futex:

futex(0xc900dd4, FUTEX_WAIT_PRIVATE, 1, NULL^C <unfinished ...>

I created a full backtrace with gdb and going to attach it.
Comment 1 Kai Krakow 2010-04-04 00:16:01 UTC 
Created attachment 42469 [details]
GDB backtrace of kopete hanging in futex
Comment 2 Kai Krakow 2010-04-05 13:48:43 UTC 
Created attachment 42502 [details]
Another hang

futex(0xda4bbec, FUTEX_WAIT_PRIVATE, 1, NULL^C <unfinished ...>
Comment 3 Roman Jarosz 2010-04-05 18:04:33 UTC 
IMHO it's kdepim/KABC bug
Comment 4 Kai Krakow 2010-04-06 17:03:45 UTC 
Yep I suspect that, too, because the backtrace includes kdepim/akonadi and I use the kaddressbook integration of kopete. The problem exists since Akonadi and KDEpim have a tighter integration - so since around 4.4.0.
Comment 5 Kai Krakow 2010-07-20 22:29:00 UTC 
Created attachment 49346 [details]
Another backtrace, gdb directly attached without interrupting kopete (v4.4.5)

The problem is still there in kopete 4.4.5. Interestingly this hangs on my home machine (x86, P4-HT 3.2GHz) but never on my work machine (amd64, Athlon64 X2) neither on my laptop (P3 1GHz, single core).
Comment 6 Tobias Koenig 2010-09-18 14:16:55 UTC 
Hej,

don't use the kresource compatibility bridges for kabc but the native Akonadi resources, please! The old kresource framework is known to have problems with nested event loops and multithreading, that's the whole reason why we started the Akonadi framework.

Ciao,
Tobias