从库复制报低级的1236错误处理

来源：互联网发布：python计算机视觉编辑：程序博客网时间：2024/04/29 19:19

一.基本信息
版本：10.1.12-MariaDB
binlog格式： ROW
事务级别：READ-COMMITTED
master1:10.16.24.107
master2:10.16.24.108
slave1:10.16.24.109
vip:10.16.24.58

用冷备方式将m2 coyp一份到s1,并在s1上执行如下：
change master to
master_host='10.16.24.108',
master_port=3307,
master_user='repl',
master_password='replsafe',
master_log_file=' mysql-bin.000009',
master_log_pos=359;

s1上启动slave，报下面错：

(product)root@localhost [(none)]> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: 10.16.24.108
                  Master_User: repl
                  Master_Port: 3307
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000009
          Read_Master_Log_Pos: 359
               Relay_Log_File: relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000009
             Slave_IO_Running: No
            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: 359
              Relay_Log_Space: 249
              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: 1236
                Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in binary log index file'
               Last_SQL_Errno: 0
               Last_SQL_Error:
Replicate_Ignore_Server_Ids:
             Master_Server_Id: 1083307
               Master_SSL_Crl:
           Master_SSL_Crlpath:
                   Using_Gtid: No
                  Gtid_IO_Pos:
      Replicate_Do_Domain_Ids:
Replicate_Ignore_Domain_Ids:
                Parallel_Mode: conservative
1 row in set (0.00 sec)

三.问题分析

1236错误一般与权限或位置不对引起。
检查m2的mysql-bin.000009的position 359，发现没有这个position。
[apps@mvxl0783 log]$ /apps/svr/mariadb101/bin/mysqlbinlog -vv --base64-output=DECODE-ROWS mysql-bin.000009 --start-position=359
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;

查找与359最接近的position为320,如下：
/apps/svr/mariadb101/bin/mysqlbinlog -vv --base64-output=DECODE-ROWS mysql-bin.000009 >./a.log

[apps@mvxl0783 log]$ tail -20 a.log
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#160608 22:29:27 server id 1083307 end_log_pos 249     Start: binlog v 4, server v 10.1.12-MariaDB created 160608 22:29:27 at startup
# Warning: this binlog is either in use or was not closed properly.
ROLLBACK/*!*/;
# at 249
#160608 22:29:27 server id 1083307 end_log_pos 320     Gtid list [0-621133307-40,
# 0-1073307-77,
# 0-1083307-80]
# at 320
#160608 22:29:27 server id 1083307 end_log_pos 359     Binlog checkpoint mysql-bin.000009
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;

stop slave，并重新change master,如下：
change master to
master_host='10.16.24.108',
master_port=3307,
master_user='repl',
master_password='replsafe',
master_log_file=' mysql-bin.000009',
master_log_pos=320;

启动slave后，查看status依然报错。

重新检查change master命令，发现master_log_file有一空格引起，
change master to
master_host='10.16.24.108',
master_port=3307,
master_user='repl',
master_password='replsafe',
master_log_file=' mysql-bin.000009',
master_log_pos=359;

四.问题解决
改成如下，则可以正常同步，不再报错。
change master to
master_host='10.16.24.108',
master_port=3307,
master_user='repl',
master_password='replsafe',
master_log_file='mysql-bin.000009',
master_log_pos=359;

(product)root@localhost [(none)]> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.16.24.108
                  Master_User: repl
                  Master_Port: 3307
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000009
          Read_Master_Log_Pos: 359
               Relay_Log_File: relay-bin.000002
                Relay_Log_Pos: 537
        Relay_Master_Log_File: mysql-bin.000009
             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: 359

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