Thanks Niko, it seems that you where right regarding libmariadbclient18 ...
downgrading libmariadbclient18 fixed the issue :-) dpkg -i libmariadbclient18_10.1.26-0+deb9u1_amd64.deb Niko Tyni wrote:
On Thu, Dec 13, 2018 at 06:44:32PM +0100, h.thien wrote:Package: apache2 Version: 2.4.25-3+deb9u6 Severity: grave Tags: patch Justification: renders package unusable gdb> Thread 1 "/opt/otrs/bin/cgi-bi" received signal SIGSEGV, Segmentation fault. gdb> bt #0 0x00007fffdcd290c7 in free_defaults () from /usr/lib/x86_64-linux-gnu/libmariadbclient.so.18 We are using unattended upgrades (security only), and we suspect that an automatic system update has installed a new Perl version that now causes these problems.Have you ruled out the MariaDB update? That one seems the most likely to have triggered this regression. https://www.debian.org/security/2018/dsa-4341 (Not sure how reliably you got the list of loaded shared libraries; you seem to be running the prefork mpm so presumably only some of your apache processes will have the libraries loaded by the actual Perl application.)
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