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340 posts

Ultimate Geek
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Topic # 220211 31-Jul-2017 17:42
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had to reboot one of my servers and notice this in the log

 

 

 

[http2:warn] [pid 2139] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.

 

couldnt find a lot about it on google but it has some thing to do with mpm_prefork being old and doesnt work with http2

 

 

 

so it there a mpm_prefork alternative i can try ??





 

 

 


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Uber Geek
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  Reply # 1834505 31-Jul-2017 19:36
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If you don't get an answer here try Server Fault. I use Nginx for HTTP/2 and it works fine. I also use CloudFlare, which does HTTP/2 automagically.




340 posts

Ultimate Geek
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  Reply # 1834621 1-Aug-2017 00:28
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found this , after doing this the server is running ok

 

 

 

 

 

Troubleshooting

 

Apache 2.4.27, HTTP/2 not supported in prefork

 

Starting from Apache 2.4.27, the Apache MPM (Multi-Processing Module) prefork no longer supports HTTP/2. This will be indicated in your Apache error log as follows:
AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.

 

To fix this, select a different MPM: event or worker. We highly recommend you to use the event prefork.
If you are using PHP, it is likely that PHP is integrated to Apache via the mod_php module, which requires the prefork MPM. If you switch out from preform MPM, you will need to use PHP as FastCGI. To switch to php-fpm, you can do as folllwing. Please note that this assumes you have PHP installed from ondrej/php repository on Ubuntu. The PHP package names could be different in other repositories. Change package name and apt-get commands to match your PHP vendor and package manager.
apachectl stop
apt-get install php7.1-fpm # Install the php-fpm from your PHP repository. This package name depends on the vendor.
a2enmod proxy_fcgi setenvif
a2enconf php7.1-fpm # Again, this depends on your PHP vendor.
a2dismod php7.1 # This disables mod_php.
a2dismod mpm_prefork # This disables the prefork MPM. Only one MPM can run at a time.
a2enmod mpm_event # Enable event MPM. You could also enable mpm_worker.
apachectl start


 
 
 
 




340 posts

Ultimate Geek
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  Reply # 1835201 1-Aug-2017 19:51
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notice that after installing php7.1-fpm id f***ed up my php scripts and wordpress

 

since php needs mpm_prefork just have to roll back to the last backup and

 

just wait for a fix or patch


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  Reply # 1835219 1-Aug-2017 20:25
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I had trouble with PHP 7 as well

Mr Snotty
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  Reply # 1835232 1-Aug-2017 20:50
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You don't need to at all - Wordpress supports PHP7. With PHP7-FPM you should be using the event MPM which is the configuration I've got on my servers:

 

a2dismod php7
a2dismod mpm_prefork
a2enmod mpm_event
a2enconf php7.0-fpm

 

Ensure you have not got mod_php enabled and have enabled the php-fpm configuration in your Apache configuration.

 

Edit: It'll also help if you post what you're running as your operating system.







340 posts

Ultimate Geek
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  Reply # 1836756 3-Aug-2017 18:03
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ubuntu 16.04

 

Apache version 2.4.27 from http://ppa.launchpad.net/ondrej/apache2/ubuntu xenial main

 

php 5.6 from http://ppa.launchpad.net/ondrej/php/ubuntu xenial main

 

 


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