set @old_max_password_errors=@@max_password_errors;
create user nosuchuser identified with 'unix_socket';
set global max_password_errors=1;
connect(localhost,nosuchuser,,test,MASTER_PORT,MASTER_SOCKET);
connect pipe_con,localhost,nosuchuser;
ERROR 28000: Access denied for user 'nosuchuser'@'localhost'
connect(localhost,nosuchuser,,test,MASTER_PORT,MASTER_SOCKET);
connect pipe_con,localhost,nosuchuser;
ERROR 28000: Access denied for user 'nosuchuser'@'localhost'
DROP USER nosuchuser;
FLUSH PRIVILEGES;
set global max_password_errors=@old_max_password_errors;