Weird behaviour with failing plugin library.

install plugin server_audit soname "server_audit.so";

ERROR 1126 (HY000): Can't open shared library '/usr/local/mysql/lib/plugin/server_audit.so' (errno: 13 /lib64/libc.so.6: version `GLIBC_2.14' not found (required by /usr/local/mysql/lib/plugin/server_audit.so))

So the plugin library cannot be loaded.

Still we have something set in the plugins table:

install plugin server_audit SONAME "server_audit.so";

ERROR 1062 (23000): Duplicate entry 'server_audit' for key 'PRIMARY'

uninstall plugin server_audit;

ERROR 1305 (42000): PLUGIN server_audit does not exist