Vladislav Vaintroub added a comment - 2017-11-24 00:38 - edited I noticed this bug a while ago already, and fixed in C/C master branch https://github.com/MariaDB/mariadb-connector-c/commit/85d150eec156275c6468b5de490a65b1e069007c I forgot however that connectors master branch is not used in server build anymore. I cherry-picked this commit into 10.2-server branch.

Sergei Golubchik added a comment - 2017-11-23 21:13 Yes, and your reproducing was invalid — you tried to load a client plugin into the server , and correctly got an error that the client plugin does not contain the symbol that only server plugins have. This was very clear from the error log, so I've replaced the description using the text from your link, merely to avoid this bug report being immediately closed as "not a bug". I didn't try to repeat it yet, but it looks plausible, not something that can be rejected outright.

Michal Schorm added a comment - 2017-11-23 20:39 Actually, I copied the /var/log output, because I was also able to reproduce it following way: $ cat /etc/my .cnf.d /auth_gssapi .cnf [mariadb] plugin-load-add=auth_gssapi_client.so loaded by the configuration $ sudo systemctl restart mariadb $ mysql MariaDB [(none)]> lead to original error: 2017-11-23 21:31:52 140340318318016 [ERROR] Can 't find symbol ' _mysql_plugin_interface_version_' in library 2017-11-23 21:31:52 140340318318016 [ERROR] Couldn 't load plugins from ' auth_gssapi_client.so'. – I didn't manage to reproduce this one a s the mysql started normally: $ mysql --plugin- dir = /usr/lib64/mariadb/plugin/ ERROR 2059 (HY000): Plugin auth_gssapi_client could not be loaded: not a plugin However, the amount of plugins loaded ("show plugins" query) remained the same if '--plugin-dir' used or not. (There are about 40 plugins in that directory)

Sergei Golubchik added a comment - 2017-11-23 19:50 updated the description to copy the most relevant part from the redhat bugzilla

Michal Schorm added a comment - 2017-11-23 15:00 Possible duplicate of MDEV-9321 ?