[FreeNX-kNX] freenx-server problem : kdeinit4 wont terminate

[Matthieu.Rioteau at skf.com]

Hi Chris,

Thanks for these good explanations and support. ;-)
Some more comments in your mail body below.
I will maybe think about writing a "smart" script that will clean up the 
zombie sessions automatically.

One last thing. Does somebody know if the KDE version included in Kubuntu 
11.10 solve the problem ?

Thank again for help.

Regards,
Matthieu

freenx-knx-bounces at kde.org wrote on 17/10/2011 08:48:25:

> From: chris
> To: freenx-knx at kde.org
> Date: 17/10/2011 08:48
> Subject: Re: [FreeNX-kNX] freenx-server problem : kdeinit4 wont 
terminate
> Sent by: freenx-knx-bounces at kde.org
> 
> 
> freenx-knx-bounces at kde.org wrote on 14/10/2011 12:58:42:
> 
> > Hi all,
> > 
> > I have currently a problem using freenx-server. When the session is 
closed 
> > by using the top right closing button of the client window, then click 

> > "End", the "kdeinit4" process doesn't terminate and stays alive. As en 

> 
> Do you mean the session's kded4, which was SPAWNED by kdeinit, 
> doesn't termintate when you 
> end your NX session by using the NX window's X button or Ctrl-Alt-T 
> and 
> then choosing "Terminate" from the "Disconnect Terminate Cancel" dialog 
??? 
> 

That exactly what happens. The remaining process is : "kdeinit4: kded4 
[kdeinit]"

> If so, you are probably noticing accumulating orphan kded4 processes, 
> one for each session you close in this manner ???? 

Indeed.

> 
> > effect, the NX session terminates correctly but the pts session stays.
> > But if the session is closed through the KDE menu ("Leave" then 
"logout"), 
> > everything terminates correctly and there is no more remaining 
process.
> 
> yup 
> 
> > 
> > The system is as follow :
> > Server : FreeNX server 0.7.3 on a Kubuntu 11.04
> > Client : NoMachine client 3.4.0-7 on Windows XP
> > 
> > I change the debug level of the NX server to 6, but it 
> > indicates no problem.
> > 
> > Could somebody help ?
> 
> Terminating the X session this way causes kded4 to 
> lock up and refuse to close on a SIGHUP or SIGTERM 
> 
> The various running kde processes report :- 
> 
>          "Fatal IO error: client killed" 
> 
> kdeinit4 then responds by trying to clean up its processes :- 
> 
>         kdeinit4: sending SIGHUP to children. 
> and 
>         kdeinit4: sending SIGTERM to children. 
> and 
> then it terminates itself 
> but 
> this has no effect on kded4, which now will only end 
> on a SIGKILL. 
> 
> 
> From debug it looks like it's left waiting on a mutex or 
> something . . . 
> 
> QWaitCondition::wait(QMutex*,unsigned long)()from/usr/lib/libQtCore.so.4 

> 
> 
> On the other hand, if you end ksmserver via kicker 
> leaving X running whilst kde sorts itself out, then kded4 
> ends when it's told to. 
> 
> 
> So far most reported problems with kded4 seem to be 
> include 100%CPU utilization running away with the 
> machine, in comparison with which this problem is fairly 
> benign, but it's still annoying htey haven't got around 
> to fixing it yet. 

It sometimes happens that the "zombie" processes takes 100% CPU. But 
that's not every time.

> 
> In the short term your options include:- 
> 
> 1/ telling your users to log out via kicker 

I chosen this one already. ;-)

> 2/ just clearing up the orphan processes every so often 

And this one also.

> 3/ adding a command file to the kde shutdown scripts 
>         e.g. create the following 3 line file 
>            /usr/shutdown/kded4.sh 
> as 
> 
> 
> #! /bin/sh 
> # 
> pkill -9 kded4 
> 
> 
> then set the file to execute 
> 
>         sudo chmod 555 /usr/shutdown/kded4.sh 
> 
> That's for Opensuse. 
> It might need to be elsewhere on planet KUbuntu. 
> 
> kde will then kill ALL YOUR USENAME'S instances of 
> kded4 whenever you end a session. 
> 
> > 
> > Thanks in advance,
> > Matthieu
> > 
> 
> Note:- This is a kde problem not a FreeNX problem

I understand it well from your explanations.
 
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