Did anyone face issues after upgrading the mariadb from 10.1 to 10.2 to login to root user as shown below:

mysql -u root

I got the error - unix_socket not loaded. 

I noticed that the unix_socket authentication is required after the upgrade for root login from localhost. Can anyone confirm whether this is part of the feature after upgrades. 

In my previous version:

select user, plugin from mysql.user;

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After upgrade:

select user, plugin from mysql.user;

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Regards,

Karthick