fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in binary log index file'

I'm getting the following 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' I've tried setting this up on 3 different machines now and initially, all seemed well, but when I went back to it, I had the same error, so I experimented on 2 other machines, both giving me the same. Below are my cnf files; my.cnf # # This group is read both both by the client and the server # use it for options that affect everything # [client-server] # # include all files from the config directory # !includedir /etc/my.cnf.d !includedir /etc/mysql my_master.cnf # MASTER MySQL database server configuration file created by master-slave-setup # this is read by the standalone daemon and embedded servers [server] [mysqld1] # # * Basic Settings # user = mysql pid-file = /var/run/mysqld/mysqld_master.pid socket = /var/run/mysqld/mysqld_master.sock port = 3306 basedir = /usr datadir = /var/lib/mysql_master tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking bind-address = 127.0.0.1 # # * Fine Tuning # key_buffer_size = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 myisam_recover_options = BACKUP query_cache_limit = 1M query_cache_size = 16M log_error = /var/log/mysql/error_master.log server-id = 1 log_bin = /var/log/mysql/mysql-bin.log expire_logs_days = 10 max_binlog_size = 100M binlog_do_db = hn innodb_flush_log_at_trx_commit = 1 sync_binlog = 1 binlog-format = ROW character-set-server = utf8mb4 collation-server = utf8mb4_general_ci my_slave.cnf # SLAVE MySQL database server configuration file created by master-slave-setup # this is read by the standalone daemon and embedded servers [server] [mysqld2] # # * Basic Settings # user = mysql pid-file = /var/run/mysqld/mysqld_slave.pid socket = /var/run/mysqld/mysqld_slave.sock port = 3307 basedir = /usr datadir = /var/lib/mysql_slave tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking bind-address = 127.0.0.1 # # * Fine Tuning # key_buffer_size = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 myisam_recover_options = BACKUP query_cache_limit = 1M query_cache_size = 16M log_error = /var/log/mysql/error_slave.log server-id = 2 #log_bin = /var/log/mysql/mysql-bin.log expire_logs_days = 10 max_binlog_size = 100M binlog_do_db = hn #binlog_ignore_db = exclude_database_name relay-log = /var/log/mysql/relay-bin #relay-log-index = /var/log/mysql/relay-bin.index #master-info-file = /var/log/mysql/master.info #relay-log-info-file = /var/log/mysql/relay-log.info character-set-server = utf8mb4 collation-server = utf8mb4_general_ci my_multi.cnf # MYSQLD_MULTI MySQL database server configuration file created by master-slave-setup [mysqld_multi] mysqld = /usr/bin/mysqld_safe mysqladmin = /usr/bin/mysqladmin user = multi_admin password = multipass Now I have tried changing the bingo_do_db to individual databases, as per the above and also left it commented out, but wasn't sure I wanted to be replicating the mysql database. I'm using mysqld_multi to start and stop the instances and believe I have setup the users correctly. I've added the following to my slave instance; CHANGE MASTER TO MASTER_HOST='127.0.0.1', MASTER_USER='replication', MASTER_PASSWORD='replication', MASTER_LOG_FILE='mysql-bin.000009', MASTER_LOG_POS=1652; The show slave status\G is as follows; MariaDB [(none)]> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Master_Host: 127.0.0.1 Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin-000009 Read_Master_Log_Pos: 1652 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: 1652 Relay_Log_Space: 248 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: 1 Master_SSL_Crl: Master_SSL_Crlpath: Using_Gtid: No Gtid_IO_Pos: 1 row in set (0.00 sec) UPDATE:- the below is a copy of the logs which may help; root@dl-sl-1:/var/log/mysql# dir error_master.log mysql-bin.000005 mysql-bin.000011 mysql-bin.index error_slave.log mysql-bin.000006 mysql-bin.000012 relay-bin.000004 mysql-bin.000001 mysql-bin.000007 mysql-bin.000013 relay-bin.index mysql-bin.000002 mysql-bin.000008 mysql-bin.000014 replication.txt mysql-bin.000003 mysql-bin.000009 mysql-bin.000015 mysql-bin.000004 mysql-bin.000010 mysql-bin.000016 root@dl-sl-1:/var/log/mysql# cat mysql-bin.index /var/log/mysql/mysql-bin.000001 /var/log/mysql/mysql-bin.000002 /var/log/mysql/mysql-bin.000003 /var/log/mysql/mysql-bin.000004 /var/log/mysql/mysql-bin.000005 /var/log/mysql/mysql-bin.000006 /var/log/mysql/mysql-bin.000007 /var/log/mysql/mysql-bin.000008 /var/log/mysql/mysql-bin.000009 /var/log/mysql/mysql-bin.000010 /var/log/mysql/mysql-bin.000011 /var/log/mysql/mysql-bin.000012 /var/log/mysql/mysql-bin.000013 /var/log/mysql/mysql-bin.000014 /var/log/mysql/mysql-bin.000015 /var/log/mysql/mysql-bin.000016 I'm also getting the below when I make changes with CHANGE MASTER TO... Last_SQL_Error: Error 'Operation CREATE USER failed for 'replication'@'%'' on query. Default database: ''. Query: 'CREATE USER 'replication'@'%' IDENTIFIED BY 'replication'' which I hadn't noticed before. This is pretty much on a clean install. Any and all help would be greatly appreciated.