Topic: php-fpm and AH01067: Failed to read FastCGI header
I am running php-fpm.x86_64 - 5.6.30-1.el7.remi
It appears php-fpm is causing a 503 service unavailable error on certain Drupal scripts (in this case taxonomy add vocabulary) and produces => AH01067: Failed to read FastCGI header - according to the log
This seems to be common - but I have not found a common path to fix it. I am running 2.4.25 Apache from Codeit with php 5.6.30 from remi
I have another CentOS 7 server - same Apache set up - NOT running php-fpm and it works fine on the same command which fails on the php-fpm system.
Otherwise they are identical
Some people find the error is related to opcache. and the answer is to - increase opcache.max_accelerated_files from default 4000 to about 16000. I do not believe i am running opcache (Zend engine opcache in phpinfo)
The other suggestion is to increase ProxyTimeout to a large number like 600 seconds - 10 minutes
Percona says increase the max_execution_time of php in the ini to a high number and connect_timeout in the my.cnf accordingly with plenty of execution memory available
The issue is clearly php-fpm as the other identical server on the plain (and slow) Apache 2.0 handler works
Does anyone know if there is a parameter to adjust to solve this in the php-fpm *.conf pool files in /etc/php-fpm.d ??
OR - HOW this is solved on Centos 7 set up of php-fpm on php-fpm.x86_64 - 5.6.30-1.el7.remi which what I have installed ( and php70-php-fpm.x86_64 - 7.0.17-1.el7.remi - BUT I am not using that one)
*** EDIT ***
Apparently php-fpm has a 30 second hard-coded timeout - which was fixed in Apache 220.127.116.11 (red hat) to honor the Proxytimeouut directive
Remi has addressed it here => forum.remirepo.net/viewtopic.php?id=3240 with some examples
I will give them a whirl - if someone knows the sure way - I am using unix sockets per domain