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php-fpm master process crashes silently

Posted by pythonimus 
php-fpm master process crashes silently
July 01, 2014 12:48PM
Hello,

I hope you can help me.
I'm running NGINX with PHP-FPM and since some weeks my master process is crashing silently. (nothing about a crash in any logs)
The Nginx and php version are irrelevent because this problem persists over some versions.
But the problem occurred after I upgraded to Ubuntu 14.04.
The strange thing is: Monit tells me that php-fpms master process is crashing once a week exactly on Sunday 6:50 or Monday 6:50 UTC +1. (Mabe something with logrotation?)
The only crazy thing I can see is, that shortly before php is crashing, its testing its configuration file multiple times / second.
I cannot see any high load or anything at the time of the crash.
I even reset every configuration file of php-fpm and installed the defaults, or set the pollig method to poll or epoll.
The latest crash was yesterday 6:50. Short before the crash (5 minutes) and after the crash (1 hour) syslog said:
kernel: [C.D] php5-fpm[8380]: segfault at X ip Y sp Z error 6 in php5-fpm[400000+7ff000]
kernel: [C.E] Core dump to |/usr/share/apport/apport A 11 0 B pipe failed

How can I fix the php and the apport error?

Thank you!
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