Bug 233216

Summary:	kopete hangs in FUTEX_WAIT_PRIVATE
Product:	[Applications] kdepimlibs	Reporter:	Kai Krakow <kai>
Component:	kabc	Assignee:	kdepim bugs <kdepim-bugs>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	kopete-bugs-null, lars.scheiter, tokoe
Priority:	NOR
Version:	4.4
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed In:
Attachments:	GDB backtrace of kopete hanging in futex Another hang Another backtrace, gdb directly attached without interrupting kopete (v4.4.5)

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