Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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2.3.3
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None
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MXS-SPRINT-76, MXS-SPRINT-77
Description
Upon a master failure, all enabled and disabled events on the promoted slave will be enabled.
Per the manual:
https://mariadb.com/kb/en/mariadb-maxscale-23-mariadb-monitor/#handle_server_events
On Master:
MariaDB [(none)]> use test;
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Reading table information for completion of table and column names
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You can turn off this feature to get a quicker startup with -A
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Database changed
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MariaDB [test]> show events;
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+---------+------------+----------------------+----------------------+--------------------+
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| Db | Name | Definer | Time zone | Type | Execute at | Interval value | Interval field | Starts | Ends | Status | Originator | character_set_client | collation_connection | Database Collation |
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+---------+------------+----------------------+----------------------+--------------------+
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| test | test_event | root@localhost | SYSTEM | ONE TIME | 2019-02-11 16:28:47 | NULL | NULL | NULL | NULL | ENABLED | 1 | latin1 | latin1_swedish_ci | latin1_swedish_ci |
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+---------+------------+----------------------+----------------------+--------------------+
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1 row in set (0.001 sec)
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****************************************
Disable event on master
****************************************
MariaDB [test]> alter event test_event disabled;
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ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'disabled' at line 1
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MariaDB [test]> alter event test_event disable;
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Query OK, 0 rows affected (0.001 sec)
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MariaDB [test]> show events;
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+----------+------------+----------------------+----------------------+--------------------+
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| Db | Name | Definer | Time zone | Type | Execute at | Interval value | Interval field | Starts | Ends | Status | Originator | character_set_client | collation_connection | Database Collation |
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+----------+------------+----------------------+----------------------+--------------------+
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| test | test_event | root@localhost | SYSTEM | ONE TIME | 2019-02-11 16:28:47 | NULL | NULL | NULL | NULL | DISABLED | 1 | latin1 | latin1_swedish_ci | latin1_swedish_ci |
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+----------+------------+----------------------+----------------------+--------------------+
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1 row in set (0.001 sec)
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MariaDB [test]> exit;
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Bye
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******************************************************
On the slave the state stays the same
******************************************************
[root@24f0e1ed4599 ~]# mysql -u root -P33062
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Welcome to the MariaDB monitor. Commands end with ; or \g.
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Your MariaDB connection id is 14
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Server version: 10.3.11-MariaDB-log MariaDB Server
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Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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MariaDB [(none)]> use test;
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Reading table information for completion of table and column names
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You can turn off this feature to get a quicker startup with -A
|
|
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Database changed
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MariaDB [test]> show events;
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+--------------------+------------+----------------------+----------------------+--------------------+
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| Db | Name | Definer | Time zone | Type | Execute at | Interval value | Interval field | Starts | Ends | Status | Originator | character_set_client | collation_connection | Database Collation |
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+--------------------+------------+----------------------+----------------------+--------------------+
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| test | test_event | root@localhost | SYSTEM | ONE TIME | 2019-02-11 16:28:47 | NULL | NULL | NULL | NULL | SLAVESIDE_DISABLED | 1 | latin1 | latin1_swedish_ci | latin1_swedish_ci |
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+------+------------+----------------+-----------+----------+---------------------+----------------+----------------+--------+------+--------------------+------------+----------------------+----------------------+--------------------+
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1 row in set (0.001 sec)
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************************************************************
Upon failover this event would be enable which could cause problems.
************************************************************