[Oppaunke]

 

on my  mariadb  ran  the following commands.  
donald@ubuntu:~$ docker exec -it mariadb /bin/bash
root@mariadb:/# mysql_upgrade -h127.0.0.1 -P 3306 --protocol=tcp -uroot -p

After this the database upgrade was successful.

My mariadb docker updates automatically to newer versions, but apparently the mysql_upgrade (which does some sort of update on all databases), never ran. 
the tip to run mysql_upgrade was the solution for me, might help others facing the same issue.

Same here, thanks for that solution!
Running the docker by linuxserver on Unraid myself.

[CpTHOOK]

 

on my  mariadb  ran  the following commands.  
donald@ubuntu:~$ docker exec -it mariadb /bin/bash
root@mariadb:/# mysql_upgrade -h127.0.0.1 -P 3306 --protocol=tcp -uroot -p

After this the database upgrade was successful.

My mariadb docker updates automatically to newer versions, but apparently the mysql_upgrade (which does some sort of update on all databases), never ran. 
the tip to run mysql_upgrade was the solution for me, might help others facing the same issue.

Same here, thanks for that solution!
Running the docker by linuxserver on Unraid myself.

Thanks a bunch!!  Also running same docker on unRAID and worked for me!!