Hi,
I do have the same problem,afer a server reboot mariadb doesnt want start again??
im on centos 8
service mysqld start
Starting mysqld (via systemctl): Job for mariadb.service failed because the control process exited with error code.
See "systemctl status mariadb.service" and "journalctl -xe" for details.
[FAILED]
mysqld[4291]: 2020-04-04 21:40:26 0 [Note] InnoDB: Number of pools: 1
mysqld[4291]: 2020-04-04 21:40:26 0 [Note] InnoDB: Using generic crc32 instructions
mysqld[4291]: 2020-04-04 21:40:26 0 [Note] InnoDB: Initializing buffer pool, total size = 256M, instances = 1, chunk size = 128M
mysqld[4291]: 2020-04-04 21:40:26 0 [Note] InnoDB: Completed initialization of buffer pool
mysqld[4291]: 2020-04-04 21:40:26 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
mysqld[4291]: 2020-04-04 21:40:26 0 [ERROR] InnoDB: Downgrade after a crash is not supported. The redo log was created with MariaDB 10.4.12.
mysqld[4291]: 2020-04-04 21:40:26 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
mysqld[4291]: 2020-04-04 21:40:26 0 [Note] InnoDB: Starting shutdown...
mysqld[4291]: 2020-04-04 21:40:27 0 [ERROR] Plugin 'InnoDB' init function returned error.
mysqld[4291]: 2020-04-04 21:40:27 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
mysqld[4291]: 2020-04-04 21:40:27 0 [Note] Plugin 'FEEDBACK' is disabled.
mysqld[4291]: 2020-04-04 21:40:27 0 [ERROR] Unknown/unsupported storage engine: InnoDB
mysqld[4291]: 2020-04-04 21:40:27 0 [ERROR] Aborting
systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE
systemd[1]: mariadb.service: Failed with result 'exit-code'.
systemd[1]: Failed to start MariaDB 10.3 database server.
-- Subject: Unit mariadb.service has failed
-- Defined-By: systemd
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