Hey together, I also have this issue and maybe I can get you some more infos to debug it.
First of all some infos on my system: OS Name: Linux x86_64 Version: 4.9.0-9-amd64 Distribution: Debian GNU/Linux 9 (stretch) [Note: Was upgraded from 8 to 9 with dist-upgrade] PHP Version: 5.6.39 Web Server: Apache/2.4.25 (Debian) [Note: Using nginx with reverse proxy to redirect to the Apache server] Database Server: Debian 9.8 version 10.1.38-MariaDB-0+deb9u1 Version OCSReports: 2.6RC After updating the package libmariadbclient18 to a version greater than 10.1.26-0+deb9u1 every inventory request to the ocsinventory server fails. Downgrading the package is not working anymore - it was a dirty workaround for about two months: apt-get install libmariadbclient18=10.1.26-0+deb9u1 apt-mark hold libmariadbclient18 --- In the nginx log I get this followed by an 502 Bad Gateway error: 2019/05/09 17:30:10 [error] 24057#24057: *1 upstream prematurely closed connection while reading response header from upstream, client: X.X.X.X, server: XXX.de, request: "GET /ocsinventory HTTP/1.1", upstream: "http://127.0.0.1:8080/ocsinventory", host: "XXX.de" In the apache log I get this error: [Thu May 09 17:30:10.968682 2019] [core:notice] [pid 1403] AH00052: child pid 5479 exit signal Segmentation fault (11) Running `dpkg -S /usr/lib/x86_64-linux-gnu/libmys*` returns: libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18 libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18.0.0 libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18 libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18.0.0 Running `dpkg -S /usr/lib/x86_64-linux-gnu/libmaria*` returns: libmariadbclient18:amd64: /usr/lib/x86_64-linux-gnu/libmariadbclient.so.18 libmariadbclient18:amd64: /usr/lib/x86_64-linux-gnu/libmariadbclient.so.18.0.0 Running `nm -D /usr/lib/x86_64-linux-gnu/libmariadbclient.so.18 | egrep 'lib(mariadb|mysql)client_18'` returns: 0000000000000000 A libmariadbclient_18 0000000000000000 A libmysqlclient_18 Running `nm -D /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18 | egrep 'lib(mariadb|mysql)client_18'` returns: 0000000000000000 A libmysqlclient_18 Removing of libmysqlclient18 would also remove php5-mysql* which is not what I want. Removing of libmariadbclient18 would also remove dovecot-mysql* libdbd-mysql-perl* libsasl2-modules-sql* postfix-mysql* proftpd-mod-mysql* sysbench* which is not what I want. I don't know what I can try to get some new results with this issue - but maybe I can help with my system do debug it further. If you need more information just tell me. Regards codiflow