mysql 5.7.18（主从）

从站状态错误

Last_IO_Error: Master command COM_REGISTER_SLAVE failed: Access denied for user 'repl'@'xxx.xxx.xxx.xxx' (using password: YES) (Errno: 1045)

主机上的错误（error.log）

2017-05-29T16:40:39.718290Z 213 [Note] Aborted connection 213 to db: 'unconnected' user: 'repl' host: 'xxx.xxx.xxx.xxx' (Got an error reading communication packets)

通过mysql客户端从slave连接到master

但是，如果我像这样从从服务器命令行登录，则没有错误，并且从服务器可以完美地连接到主服务器。所以肯定是主从配置有什么不对的

mysql -h xxx.xxx.xxx.xxx -u repl -pxxxxxxxxxxxx
mysql> show grants;
+--------------------------------------------+
| Grants for repl@xxx.xxx.xxx.xxx            |
+--------------------------------------------+
| GRANT USAGE ON *.* TO 'repl'@'xxx.xxx.xxx.xxx' |
+--------------------------------------------+
1 row in set (0.00 sec)

在 master 上创建复制用户

CREATE USER 'repl'@'xxx.xxx.xxx.xxx' IDENTIFIED BY 'xxxxx'; …

在大表上执行期间，OPTIMIZE TABLE该过程似乎“锁定”了表。您可以采取一些措施来加快该过程或防止它“锁定”表吗？

执行时应用程序/服务超时OPTIMIZE TABLE

mysql 5.7.36

我的cnf

[mysqld]

# GENERAL #
user                           = mysql
port                           = 3306
default_storage_engine         = InnoDB
pid-file                       = /var/run/mysqld/mysqld.pid
socket                         = /var/run/mysqld/mysqld.sock

# SAFETY #
max_allowed_packet             = 16M
max_connect_errors             = 1000000
skip_name_resolve
sql_mode                       = STRICT_ALL_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO
sysdate_is_now                 = 1
symbolic_links                 = 0

# DATA STORAGE #
datadir                        = /var/lib/mysql/

# BINARY LOGGING #
server_id                      = 1
log_bin                        = /var/lib/mysql/mysql-bin
expire_logs_days               = 10
sync_binlog                    = 1
log_bin_trust_function_creators= 1
binlog_format                  = ROW
master_verify_checksum         = 1

# …