[debian-mysql] Bug#891218: mariadb-server-10.1: logrotate sometimes fails with "Lost connection to MySQL server"

[Ralf Jung]

Package: mariadb-server-10.1
Version: 10.1.26-0+deb9u1
Severity: normal

Dear Maintainer,

sometimes (but not every day), logrotate fails saying

/etc/cron.daily/logrotate:
mysqladmin: connect to server at 'localhost' failed
error: 'Lost connection to MySQL server at 'sending authentication information', system error: 32 "Broken pipe"'
error: error running shared postrotate script for '/var/log/mysql/mysql.log /var/log/mysql/mysql-slow.log /var/log/mysql/mariadb-slow.log /var/log/mysql/error.log '
run-parts: /etc/cron.daily/logrotate exited with return code 1

I can't see anything about this in other logfiles.

Kind regards,
Ralf

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 'testing-debug'), (100, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled