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gtid_ignore_duplicates treats gtid_seq_no as 32-bit.
On the master, let's insert some data:
MariaDB [(none)]> SET SESSION gtid_domain_id=102;
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Query OK, 0 rows affected (0.00 sec)
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MariaDB [(none)]> SET SESSION gtid_seq_no=4294967294;
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Query OK, 0 rows affected (0.00 sec)
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MariaDB [(none)]> INSERT INTO db1.test_table VALUES (1, 'str');
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Query OK, 1 row affected (0.00 sec)
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MariaDB [(none)]> SET SESSION gtid_domain_id=102;
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Query OK, 0 rows affected (0.00 sec)
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MariaDB [(none)]> SET SESSION gtid_seq_no=4294967295;
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Query OK, 0 rows affected (0.00 sec)
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MariaDB [(none)]> INSERT INTO db1.test_table VALUES (2, 'str');
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Query OK, 1 row affected (0.00 sec)
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MariaDB [(none)]> SET SESSION gtid_domain_id=102;
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Query OK, 0 rows affected (0.00 sec)
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MariaDB [(none)]> SET SESSION gtid_seq_no=4294967296;
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Query OK, 0 rows affected (0.01 sec)
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MariaDB [(none)]> INSERT INTO db1.test_table VALUES (3, 'str');
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Query OK, 1 row affected (0.00 sec)
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On the slave, the last insert was ignored:
MariaDB [(none)]> SELECT * FROM db1.test_table;
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+----+------+
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| id | str |
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+----+------+
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| 1 | str |
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| 2 | str |
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+----+------+
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2 rows in set (0.00 sec)
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MariaDB [(none)]> show slave status\G
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*************************** 1. row ***************************
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Slave_IO_State: Waiting for master to send event
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Master_Host: 192.168.1.33
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Master_User: repl
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Master_Port: 3306
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Connect_Retry: 60
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Master_Log_File: mariadb-bin.000005
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Read_Master_Log_Pos: 3192
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Relay_Log_File: master-relay-bin.000002
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Relay_Log_Pos: 1367
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Relay_Master_Log_File: mariadb-bin.000005
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Slave_IO_Running: Yes
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Slave_SQL_Running: Yes
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Replicate_Do_DB:
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Replicate_Ignore_DB:
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Replicate_Do_Table:
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Replicate_Ignore_Table:
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Replicate_Wild_Do_Table:
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Replicate_Wild_Ignore_Table:
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Last_Errno: 0
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Last_Error:
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Skip_Counter: 0
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Exec_Master_Log_Pos: 3192
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Relay_Log_Space: 1665
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Until_Condition: None
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Until_Log_File:
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Until_Log_Pos: 0
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Master_SSL_Allowed: No
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Master_SSL_CA_File:
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Master_SSL_CA_Path:
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Master_SSL_Cert:
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Master_SSL_Cipher:
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Master_SSL_Key:
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Seconds_Behind_Master: 0
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Master_SSL_Verify_Server_Cert: No
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Last_IO_Errno: 0
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Last_IO_Error:
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Last_SQL_Errno: 0
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Last_SQL_Error:
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Replicate_Ignore_Server_Ids:
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Master_Server_Id: 2
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Master_SSL_Crl:
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Master_SSL_Crlpath:
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Using_Gtid: Slave_Pos
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Gtid_IO_Pos: 101-2-4294967296,100-2-1000000000003,22-2-24,102-2-4294967296,1-2-10001
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1 row in set (0.00 sec)
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The source code appears to cast gtid_seq_no as uint32 here:
https://github.com/MariaDB/server/blob/d258f5ff0435cbd8b000226dc7dc3ec4e9b79cbc/sql/rpl_gtid.cc#L120
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