mariadb : Relay log write failure

Question

I am currently trying to get a MariaDB 10.2.9 to run as a slave of a mysql 5.5 master but i keep getting the same error (Last_IO_Errno: 1595, Relay log write failure: could not queue event from master)

As there is some difference in version between master and slave i had to set

set global binlog_checksum='NONE';

All in all i took a mysqldump of the master, read the log_pos/file and

SET GLOBAL server_id=2;
CHANGE MASTER TO 
MASTER_HOST='10.145.46.11',MASTER_USER='replicant',MASTER_PASSWORD='...', 
MASTER_LOG_FILE='mysql-bin.000042', MASTER_LOG_POS=107;
start slave;

But the IO Thread simply wont start, the mariadb.log says:

...
2017-10-31 11:44:41 140026338711296 [Note] Slave SQL thread initialized, starting replication in log 'mysql-bin.000007' at position 107, relay log './mariadb-relay-bin.000001' position: 4
2017-10-31 11:44:41 140027007977216 [Note] Slave I/O thread: connected to master '[email protected]:3306',replication started in log 'mysql-bin.000007' at position 107
2017-10-31 11:44:42 140027007977216 [Warning] Slave I/O: Notifying master by SET @master_binlog_checksum= @@global.binlog_checksum failed with error: Unknown system variable 'binlog_checksum', Internal MariaDB error code: 1193
2017-10-31 11:44:42 140027007977216 [ERROR] Slave I/O: Replication event checksum verification failed while reading from network, Internal MariaDB error code: 1743
2017-10-31 11:44:42 140027007977216 [ERROR] Slave I/O: Relay log write failure: could not queue event from master, Internal MariaDB error code: 1595
2017-10-31 11:44:42 140027007977216 [Note] Slave I/O thread exiting, read up to log 'mysql-bin.000007', position 107
....

I am also not sure what kind of checksum is failing here (mysql reference says "replication event checksum"?), ive tried:

set global slave_sql_verify_checksum=0;

current status is:

MariaDB [(none)]> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.145.46.11
                  Master_User: replicant
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000007
          Read_Master_Log_Pos: 107
               Relay_Log_File: mariadb-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000007
             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: 107
              Relay_Log_Space: 256
              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: 1595
                Last_IO_Error: Relay log write failure: could not queue event from master
               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: 
      Replicate_Do_Domain_Ids: 
  Replicate_Ignore_Domain_Ids: 
                Parallel_Mode: conservative
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it

Answer 1

I had the same issue and found an answer. The variable slave_sql_verify_checksum as to be set in the configuration file my.cnf. Set slave_sql_verify_checksum = NONE and restart the server.