APACHE 2.4 + php-fpm not closing old thread and 100% cPU usage

Hello, i need help please, i find no solution to resolve this problem:

Recently i change server for new one in centos 6 x64 and reinstall all with custombuild 2. All look good, but recently i see problem to received email, and when i check my server i see my xeon 8 core at 100% !!!! all core, so in averload, and email not send to receiver.

So i check my process, i fund no attack, only old process of httpd not closed.

I try modify httpd-mpm.conf (event section) with no result.



Someone already had this problem ?? and how to resolve this ??



PS: i dont want nginx



I send you screenshot when problem come back ( i just restart httpd server)



Thanks

APACHE 2.4 + php-fpm not closing old thread and 100% cPU usage