Tag Archives: Mysql Got fatal error 1236

[Solved] Mysql Got fatal error 1236 from master when reading data from binary log: ‘Could not find first log file name in binary log index file’

Got fatal error 1236 from master when reading data from binary log:’Could not find first log file name in binary log index file’ occurs in master-slave synchronization, it is caused by inconsistent master-slave log version numbers. The solution is as follows:

View the main log number
 MariaDB [(none)] > Flush logs; (At this time, the main server will recreate a binlog file;)
 MariaDB [(none)]> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+---- --------------+
| mysql-bin.000003 |      385 |              |                  |
+------------------+----------+--------------+---- --------------+
1 row in set (0.000 sec)

 View the slave log file number from show slave status\G
   File :mysql-bin.000005
It was found that the master and slave log file numbers were different. 
Stop slave from it;
MariaDB [(none)]> change master to master_log_file ='dbmaster-bin.000005',master_log_pos=120;
MariaDB [(none)]> flush privileges;
MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.220.130
Master_User: test
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 385
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 555
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes