Comment 5 for bug 1590166

Sorry for the delay. It has happened in multiple environments. This was one of them:

root@usw1infr001_galera_container-1a59697a:~# dpkg -l | grep mariadb
ii libmariadbclient-dev 10.0.25+maria-1~trusty amd64 MariaDB database development files
ii libmariadbclient18 10.0.25+maria-1~trusty amd64 MariaDB database client library
ii mariadb-client 10.0.25+maria-1~trusty all MariaDB database client (metapackage depending on the latest version)
ii mariadb-client-10.0 10.0.25+maria-1~trusty amd64 MariaDB database client binaries
ii mariadb-client-core-10.0 10.0.25+maria-1~trusty amd64 MariaDB database core client binaries
ii mariadb-common 10.0.25+maria-1~trusty all MariaDB database common files (e.g. /etc/mysql/conf.d/mariadb.cnf)
ii mariadb-galera-server-10.0 10.0.25+maria-1~trusty amd64 MariaDB database server with Galera cluster binaries

root@usw1infr001_galera_container-1a59697a:~# dpkg -l | grep xtrabackup
ii percona-xtrabackup-22 2.2.13-1.trusty amd64 Open source backup tool for InnoDB and XtraDB