Plesk 9.5.2 > 10.0.1: licence management: error 500

[RonnyG]

Hi,

there seems to be a problem during an upgrade from Plesk 9.5.2 to 10.0.1.
Most of it works, but if I want to access the licence-management, there is a 500 internal server error.
I checked the logfiles and received:

DEBUGGER DETECTED... Bye!
2010-11-17 17:33:30: (mod_fastcgi.c.2476) unexpected end-of-file (perhaps the fastcgi process died): pid: 6059 socket: unix:/opt/psa/tmp/sw-engine.sock-0
2010-11-17 17:33:30: (mod_fastcgi.c.3259) response not received, request sent: 1059 on socket: unix:/opt/psa/tmp/sw-engine.sock-0 for /plesk.php , closing connection
DEBUGGER DETECTED... Bye!
2010-11-17 17:36:08: (mod_fastcgi.c.2476) unexpected end-of-file (perhaps the fastcgi process died): pid: 6188 socket: unix:/opt/psa/tmp/sw-engine.sock-0
2010-11-17 17:36:08: (mod_fastcgi.c.3259) response not received, request sent: 1059 on socket: unix:/opt/psa/tmp/sw-engine.sock-0 for /plesk.php , closing connection


Also, there is another information:

[ 1906.504895] ptrace of non-child pid 6198 was attempted by: sw-engine-cgi (pid 6206)

This means it seems a problem with the fastcgi - engine loosing a connection to the pid.



The system (Debian 5.0, 64bit) is up2date.

Thanks for any help.

 

[IgorG]

Maybe it will help:

http://forum.parallels.com/showthread.php?t=102302
http://forum.parallels.com/showthread.php?t=106103

 

[RonnyG]

Igor, we do not use VPS It is a real box, with Hexacore CPU and 24 GB of memory ;-).
Nethertheless, you spoke ´bout "There is special VPS Optimized Mode for Plesk 10.x "
How could it be activated? Thanks.

 

[IgorG]

http://download1.parallels.com/Plesk/PP10/10.0.1/Doc/en-US/online/plesk-vps-optimized/

 

[RonnyG]

Igor, Thanks.
But I do not think that it depends at the resources ;-), really.
It is a Intel Hexacore CPU with HT (12 cores all in one) and 24 GB of memory.
Box has no hardware failures (already checked it), memory usage is around 7 GB of memory.
I already tried the latest kernels (2.6.35, 2.6.37), but no success. The ptrace gets lost while entering the licence-panel and then, server is sending error 500 again and again

Thanks
Ronny

 

[IgorG]

I can't say what is wrong there. Detailed investigation directly on your server is required. Therefore I suggest you contact Support Team. Experienced support guys will found a reason.

 

[RonnyG]

Igor, please contact me directly: mail -at- ronny-goerner dot de
thank you.

 

[IgorG]

Igor, please contact me directly: mail -at- ronny-goerner dot de
thank you.

Sorry, I'm not supporter and I haven't corresponding responsibility. Use PM on this forum.

 

[RonnyG]

After many hours, I found what the problem is:
Normally, Debian 5.0 64bit runs with 2.6.26 kernel, current is 2.6.26-2-amd64. While booting this kernel, all works fine.
If you use .deb package with 2.6.35-22 or 2.6.37-5 or even try to manually setup a kernel > 2.6.29, this strange ptrace lost appears. So I just can imagine that something has changed within the kernel which occurs this strange bug. Maybe Parallels may have a try to reproduce it in your labs?

Thank you,
Ronny

Igor: Thanks for helping. Please; may you have any suggestion for this bug? http://forum.parallels.com/showthread.php?t=106081