Hello, I've the same problem with my installation. Some information about stack:
Server version: Apache/2.4.25 (Debian) Server built: 2018-03-31T08:47:16 Kernel version: 4.16.8 OS: Debian 9.4 PHP 5.6.36-1+0~20180505045928.13+stretch~1.gbp9b5cab (cli) Copyright (c) 1997-2016 The PHP Group Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies For my website, I use php5.6-fpm and reverse proxy (nginx -> apache2). In kern.log i see this error: Jun 17 13:54:27 alibox kernel: apache2[14997]: segfault at 7fde538287a0 ip 00007fde538287a0 sp 00007ffdfa05e588 error 14 in libexpat.so.1.6.2[7fde55891000+27000] This error I've when one of my website have crash. This page probably wrote on PHP 5.3. I must restart apache2 so that the website starts to function normally. When I restart apache2 again, when site working ok, i haven't any error. Can you tell me, where i must search problem? Is a problem, can be a my kernel config? -- Pozdrawiam, Przemysław Jagielski