MySQL数据库之3分钟解决MySQL主从1594错误-职坐标

MySQL数据库之3分钟解决MySQL主从1594错误

小标 2019-06-24 来源：阅读 943 评论 0

摘要：本文主要向大家介绍了MySQL数据库之3分钟解决MySQL主从1594错误，通过具体的内容向大家展现，希望对大家学习MySQL数据库有所帮助。

本文主要向大家介绍了MySQL数据库之3分钟解决MySQL主从1594错误，通过具体的内容向大家展现，希望对大家学习MySQL数据库有所帮助。

MySQL数据库之3分钟解决MySQL主从1594错误

简介

Part1:写在最前

1594这个错误看起来挺严重的，会提示你binlog文件或者Relay log损坏了,例如binary log is corrupted、relay log is corrupted之类的看起来很吓人是吧，多数是由于掉电引发的，这也说明了机房配备UPS的重要性。本文来自真实生产案例，感谢网友加内特提供，本人加以故障重现校验。一起来看下如何解决吧。

Part2:完整报错信息

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.250
                  Master_User: mysync
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000006
          Read_Master_Log_Pos: 2091061
               Relay_Log_File: mysql-relay-bin.000002
                Relay_Log_Pos: 1675027
        Relay_Master_Log_File: mysql-bin.000006
             Slave_IO_Running: Yes
            Slave_SQL_Running: No
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: 
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 1594
                   Last_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's relay log is corrupted (you can check this by running 'mysqlbinlog' on the relay log), a network problem, or a bug in the master's or slave's MySQL code. If you want to check the master's binary log or slave's relay log, you will be able to know their names by issuing 'SHOW SLAVE STATUS' on this slave.
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 1675875
              Relay_Log_Space: 2093990
              Until_Condition: None
               Until_Log_File: 
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File: 
           Master_SSL_CA_Path: 
              Master_SSL_Cert: 
            Master_SSL_Cipher: 
               Master_SSL_Key: 
        Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 1594
               Last_SQL_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's relay log is corrupted (you can check this by running 'mysqlbinlog' on the relay log), a network problem, or a bug in the master's or slave's MySQL code. If you want to check the master's binary log or slave's relay log, you will be able to know their names by issuing 'SHOW SLAVE STATUS' on this slave.
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 1250
                  Master_UUID: 975d0e4f-bb5d-11e6-98a3-000c29c6361d
             Master_Info_File: /data/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 161205 21:57:01
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 0
1 row in set (0.00 sec)

解决办法

Part1:停止从库

mysql> stop slave;
Query OK, 0 rows affected (0.00 sec)
mysql> reset slave all;
Query OK, 0 rows affected (0.25 sec)
mysql>  CHANGE MASTER TO MASTER_HOST='192.168.1.250',MASTER_USER='mysync',MASTER_PASSWORD='MANAGER',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000006',MASTER_LOG_POS=1675875;
Query OK, 0 rows affected, 2 warnings (0.01 sec)

上述的POS号就是Exec_Master_Log_Pos: 1675875

Part2:起库校验

mysql> start slave;

Query OK, 0 rows affected (0.01 sec)

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.250
                  Master_User: mysync
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000006
          Read_Master_Log_Pos: 2091061
               Relay_Log_File: mysql-relay-bin.000002
                Relay_Log_Pos: 354960
        Relay_Master_Log_File: mysql-bin.000006
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: 
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 2030552
              Relay_Log_Space: 415642
              Until_Condition: None
               Until_Log_File: 
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File: 
           Master_SSL_CA_Path: 
              Master_SSL_Cert: 
            Master_SSL_Cipher: 
               Master_SSL_Key: 
        Seconds_Behind_Master: 796
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 1250
                  Master_UUID: 975d0e4f-bb5d-11e6-98a3-000c29c6361d
             Master_Info_File: /data/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Reading event from the relay log
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 0
1 row in set (0.00 sec)

可以看到从库已经开始在追主库了。

Part3:checksum校验

mysql> checksum table helei;
+-------------+------------+
| Table       | Checksum   |
+-------------+------------+
| helei.helei | 2698376487 |
+-------------+------------+
1 row in set (0.00 sec)
mysql> checksum table helei;
+-------------+-----------+
| Table       | Checksum  |
+-------------+-----------+
| helei.helei | 416306435 |
+-------------+-----------+
1 row in set (0.00 sec)

可以看到这里两表已经不一致了，虽然从库完成了同步。但需要重进对主从进行校验了。

[root@HE1 ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.6.25-log MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> select @@hostname;
+------------+
| @@hostname |
+------------+
| HE1        |
+------------+
1 row in set (0.00 sec)

mysql> select count(*) from helei.helei;
+----------+
| count(*) |
+----------+
|     4738 |
+----------+
1 row in set (0.00 sec)

mysql>

[root@HE3 ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 5.6.25-log MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> select @@hostname;
+------------+
| @@hostname |
+------------+
| HE3        |
+------------+
1 row in set (0.00 sec)

mysql> select count(*) from helei.helei;
+----------+
| count(*) |
+----------+
|     5000 |
+----------+
1 row in set (0.00 sec)

mysql>