Hi Patrick

After installing apache on ubuntu I type the following to use the prefork version

sudo a2dismod mpm_event
sudo a2enmod mpm_prefork

Regards

Tim

On 1/3/22 09:58, Patrick Abuzeni via Webobjects-dev wrote:
Thank you Samuel. Can you elaborate a bit more.


Best Regards,

Patrick Abuzeni, MD

www.xeoTECH.com <http://www.xeoTECH.com>

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On Feb 28, 2022, at 4:42 PM, Samuel Pelletier <sam...@samkar.com> wrote:

Hi Patrick,

Your apache mp3 is probably set to something other than prefork. The WOAdaptor does not support threaded mpm.

Regards,

Samuel


Le 28 févr. 2022 à 14:22, Patrick Abuzeni via Webobjects-dev <webobjects-dev@lists.apple.com> a écrit :


Hello everyone

Have a Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-90-generic x86_64) cloud server with a number of WO applications deployed. WOAdapter was compiled on the server. Apache (Server version: Apache/2.4.41 (Ubuntu)) is regularly crashing and for no reason. The application remains unaffected but an error does pop up on the page from time to time and occasionally going to next page hangs. Are considering running the applications without the WOAdapter and wonder if anyone has seen this and if there is a way to get around this error maybe without resorting to the mod_proxy?

[Mon Feb 28 11:55:57.449896 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 754580 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Feb 28 12:08:20.227915 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 754978 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Feb 28 12:08:20.227987 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 755017 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Feb 28 12:08:20.228009 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 755302 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Feb 28 13:11:34.192992 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 755479 exit signal Segmentation fault (11), possible coredump in /etc/apache2
double free or corruption (out)
[Mon Feb 28 13:32:56.523508 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 756719 exit signal Aborted (6), possible coredump in /etc/apache2 [Mon Feb 28 13:33:39.569401 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 755371 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Feb 28 13:34:42.635028 2022] [core:notice] [pid 719456:tid 140259097431104] AH00051: child pid 757457 exit signal Segmentation fault (11), possible coredump in /etc/apache2
[Mon Feb 28 13:50:2

The "possible coredump" is a tease and is non-existent.


Best Regards,

Patrick Abuzeni, MD

www.xeoTECH.com <http://www.xeotech.com/>

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