ubuntu 16.04 - Get an error When I change prefork MPM to worker MPM in apache2.4 Ubuntu16.04 -


my apache2.4.18 in ubuntu 16.04 prefork mpm loaded modules: apache loaded modules

i want change prefork mpm worker mpm

sudo a2dismod mpm_prefork sudo a2enmod mpm_worker sudo service apache2 restart

then notice , can't restart apache:

"the apache2 configtest failed  apache running threaded mpm, php module not compiled threadsafe.  need recompile php.  apache2.service: control process exited, code=exited status=1  failed start lsb: apache2 web server."

i try install php7.0-fpm, doesn't work me. should if want change prefork worker ??? how can fix these? in advance


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