1call mtr.add_suppression("The plugin 'auth_socket' used to authenticate user .* is not loaded. Nobody can currently login using this account."); 2create table mysql_user_bak as select * from mysql.user; 3update mysql.user set plugin='auth_socket'; 4flush privileges; 5connect(localhost,USER,,test,MASTER_PORT,MASTER_SOCKET); 6ERROR 28000: Access denied for user 'USER'@'localhost' (using password: NO) 7ERROR 28000: Access denied for user 'USER'@'localhost' (using password: NO) 8install plugin auth_socket soname 'auth_socket.so'; 9connect(localhost,USER,,test,MASTER_PORT,MASTER_SOCKET); 10Got one of the listed errors 11ERROR 28000: Access denied for user 'USER'@'localhost' (using password: NO) 12update mysql.user set plugin=''; 13delete from mysql.user; 14insert into mysql.user select * from mysql_user_bak; 15flush privileges; 16drop table mysql_user_bak; 17uninstall plugin auth_socket; 18