Recover a MariaDB database
Before trying to recover a MariaDB Galera database, you should check the exact error in the MariaDB Galera log file at /opt/bitnami/mariadb/data/mysqld.log in each of the nodes. Check the latest entries in the MariaDB log file with the following command:
$ sudo tail -n 100 /opt/bitnami/mariadb/logs/mysqld.log
Also, check the cluster status in the /opt/bitnami/mariadb/data/grastate.dat file. If you need to restart the cluster follow the restart the cluster documentation. Do not restart the cluster in any order because data corruption may occur.
If you cannot fix the issue, we can try to help at http://community.bitnami.com.