Shulou(Shulou.com)06/01 Report--

1. ERROR 2061 (HY000): Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.

[analysis] mysql8 uses the plug-in caching_sha2_password by default, and some client connections report this error. You need to get the public key of server to encrypt password.

[solution] it can be solved by adding parameters:-- get-server-public-key

Mysql-u sha2user-p-- get-server-public-key. You will also encounter this situation when you copy from master and slave, add get_master_public_key=1.

Change master to

Master_host='192.168.2.135'

Master_port=3306

Master_user='repl_user'

Master_password='123456'

Master_auto_position=1

Get_master_public_key=1

2.Multiple files found for the same tablespace ID:

2019-10-22T15:27:22.848885+08:00 1 [ERROR] [MY-012209] [InnoDB] Multiple files found for the same tablespace ID:

2019-10-22T15:27:22.848904+08:00 1 [ERROR] [MY-012202] [InnoDB] Tablespace ID: 1 = ['sys/sys_config.ibd',' sys/sys_config.ibd']

2019-10-22T15:27:22.848915+08:00 1 [ERROR] [MY-012202] [InnoDB] Tablespace ID: 15 = ['test/t.ibd',' test/t.ibd']

2019-10-22T15:27:22.848922+08:00 1 [ERROR] [MY-012202] [InnoDB] Tablespace ID: 4294967278 = ['undo_002',' undo_002']

2019-10-22T15:27:22.848932+08:00 1 [ERROR] [MY-012202] [InnoDB] Tablespace ID: 4294967279 = ['undo_001',' undo_001']

2019-10-22T15:27:22.848939+08:00 1 [ERROR] [MY-012202] [InnoDB] Tablespace ID: 4294967294 = ['mysql.ibd',' mysql.ibd']

2019-10-22T15:27:22.848952+08:00 1 [ERROR] [MY-012930] [InnoDB] Plugin initialization aborted with error Failed, retry may succeed.

2019-10-22T15:27:22.849080+08:00 1 [ERROR] [MY-010334] [Server] Failed to initialize DD Storage Engine

2019-10-22T15:27:22.849297+08:00 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.

[answer] start the file with the parameter innodb_directories= "/ data/mysqldata;"

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