MariaDB

Question

检查slave状态时出现如下错误

中继日志读取失败：无法解析中继日志事件条目。可能的原因是：master的binary log损坏了（可以在binary log上通过运行 'mysqlbinlog'查看），slave的relay log损坏（可以通过运行查看） 'mysqlbinlog' 在中继日志上），网络问题，或者主从的 MySQL 代码中的错误。如果你想查看master的binary log或者slave的relay log，你可以通过在这个slave上发出'SHOW SLAVE STATUS'来知道他们的名字。

我正在使用带复制功能的 Bitnami 的 MariaDB，其中有 1 个主节点和 2 个从节点，其中一个节点似乎已损坏，并且出现了上述错误。

解释我采取的步骤 post 节点停止工作

有一个 system_user 查询被卡住了，尝试终止它，但不幸的是它没有被删除。
重新启动从节点以便刷新所有查询。
Post 服务器重新启动，MySQL 停止工作并出现套接字错误。

请大家帮我解决问题。无法解决这个错误

Answer 1

我已经通过以下步骤解决了同样的问题。

查看当前slave状态执行命令：

show slave status\G

您应该会看到类似这样的结果：

*************************** 1. row ***************************
                Slave_IO_State: Waiting for master to send event
                   Master_Host: provisioner-peer
                   Master_User: repl
                   Master_Port: 3306
                 Connect_Retry: 10
               Master_Log_File: mysql-bin.000149
           Read_Master_Log_Pos: 919065590
                Relay_Log_File: mysql-relay-bin.000450
                 Relay_Log_Pos: 884188250
         **Relay_Master_Log_File: mysql-bin.000149**
              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 run
ning '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: 884187951**
               Relay_Log_Space: 919067911
               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 run
ning '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: 287
                Master_SSL_Crl: 
            Master_SSL_Crlpath: 
                    Using_Gtid: No
                   Gtid_IO_Pos: 
       Replicate_Do_Domain_Ids: 
   Replicate_Ignore_Domain_Ids: 
                 Parallel_Mode: conservative
                     SQL_Delay: 0
           SQL_Remaining_Delay: NULL
       Slave_SQL_Running_State: 
              Slave_DDL_Groups: 0
Slave_Non_Transactional_Groups: 0
    Slave_Transactional_Groups: 1
1 row in set (0.000 sec)

您应该注意的重要值是 Relay_Master_Log_File 和 Exec_Master_Log_Pos。您将需要它们在您的从站上正确地重新启动复制。

要重新启动复制，请执行以下命令：

STOP SLAVE;

RESET SLAVE;

CHANGE MASTER TO master_log_file='mysql-bin.000149', master_log_pos=884187951;

START SLAVE;

要检查复制是否再次工作，请再次执行命令：

show slave status\G

在您将您的从站称为已同步之前，请检查状态命令中参数 Seconds_Behind_Master 的值。在我们的案例中，我看到了价值（7971 秒）：

Seconds_Behind_Master: 7971

在接下来的几分钟内，复制再次与 master 同步，复制延迟为 0s

注意：为了安全先备份你的数据库

MariaDB - 中继日志读取失败：无法解析中继日志事件条目

MariaDB - Relay log read failure: Could not parse relay log event entry

mysql

bitnami