Ho questa situazione:
due server mysql.
Nella sezione [mysqld] ho le seguenti "entry":

Sulla macchina vm-pf-db01 ho:

server-id = 1
master-host = vm-pf-db02
master-user = slaveuser
master-password = slavepw
master-port = 3306


Sulla macchina vm-pf-db02 ho:

server-id = 1
master-host = vm-pf-db01
master-user = slaveuser
master-password = slavepw
master-port = 3306


Eseguo su entrambe: "start slave;"

Verificando lo status:
show slave status\G;

sulla vm-pf-db01 ho un errore:
               Slave_IO_State: 
                  Master_Host: vm-pf-db02
                  Master_User: slaveuser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000007
          Read_Master_Log_Pos: 301777644
               Relay_Log_File: mysqld-relay-bin.000038
                Relay_Log_Pos: 149
        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: 301777644
              Relay_Log_Space: 348
              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: 'log event entry exceeded max_allowed_packet; Increase 
max_allowed_packet on master'
               Last_SQL_Errno: 0
               Last_SQL_Error: 
1 row in set (0.00 sec)

ERROR: 
No query specified



mentre la vm-pf-db02 sembra apposto:
               Slave_IO_State: Waiting for master to send event
                  Master_Host: vm-pf-db01
                  Master_User: slaveuser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000006
          Read_Master_Log_Pos: 106
               Relay_Log_File: mysqld-relay-bin.000215
                Relay_Log_Pos: 251
        Relay_Master_Log_File: mysql-bin.000006
             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: 106
              Relay_Log_Space: 552
              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: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 0
               Last_SQL_Error: 
1 row in set (0.01 sec)

ERROR: 
No query specified


Effettivamente attivando il "debug" su mysql (\W):
sulla vm-pf-db02 ho:
mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

Note (Code 1254): Slave is already running

ovvero il thread slave è avviato (!).

mentre sulla vm-pf-db01 non mi da alcun warning, ogni volta che lo eseguo,
come se lo slave in realtà non si avviasse.

Idee??
Ho dato le grant giuste all'utente.


Walter


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