Bug 197315

Summary:	knotify4 slows down when flooding with messages
Product:	[Frameworks and Libraries] kdelibs	Reporter:	Bob K <metamorfozis>
Component:	knotify	Assignee:	Olivier Goffart <ogoffart>
Status:	RESOLVED FIXED
Severity:	normal	CC:	MattFinn, plasma-bugs
Priority:	NOR
Version:	4.2
Target Milestone:	---
Platform:	Ubuntu
OS:	Unspecified
Latest Commit:		Version Fixed In:

Description Bob K 2009-06-20 21:31:52 UTC

Version:            (using KDE 4.2.90)
Installed from:    Ubuntu Packages

If knotify4 (i hope this is the name of the app, correct me if not) receives a lot of messages, then the whole plasma-desktop freezes.

After i do:
$ killall plasma-desktop; plasma-desktop;
it starts up very slowly, and prints thousands of lines like this:
QGraphicsGridLayout::itemAt: invalid index 7                                                                                     
QGraphicsGridLayout::itemAt: invalid index 0                                                                                     
QGraphicsGridLayout::itemAt: invalid index 2                                                                                     
QGraphicsGridLayout::itemAt: invalid index 7                                                                                     
QGraphicsGridLayout::itemAt: invalid index 0                                                                                     
QGraphicsGridLayout::itemAt: invalid index 2                                                                                     
QGraphicsGridLayout::itemAt: invalid index 7         


I just notified (lol) it while getting a bug in networkmanager:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/389985

Comment 1 Murph Finnicum 2010-05-13 08:08:13 UTC

I got this. knotify4 shot up to 2GB+ of memory usage, X locked up.

Somebody ran this on from their ssh term

yes "blah" | write myusername

this triggered some infinitely many kde write daemon messages.

Perhaps there should be some flood limiting?

Comment 2 Bob K 2013-11-05 12:22:08 UTC

Tried with this :
#watch -n 0,1 "kdialog --passivepopup "thing" 3 --title TEST"
Seems to be okay.

Thanks