I am utilizing MariaDB 10.3.22 on debian buster; I’ve arrange a question to cleanup some expired person session from a desk; this question ought to run each 15 minutes; the question is appropriate (examined and dealing on one other equivalent DB however based mostly on MySQL) however the begin occasion will not be triggered.

What I checked up to now:

Occasion scheduler is ON

MariaDB [(none)]> present processlist;
+-----+-----------------+-----------+------+---------+-------+-----------------------------+------------------+----------+
| Id  | Person            | Host      | db   | Command | Time  | State                       | Information             | Progress |
+-----+-----------------+-----------+------+---------+-------+-----------------------------+------------------+----------+
|   1 | system person     |           | NULL | Daemon  |  NULL | InnoDB purge coordinator    | NULL             |    0.000 |
|   2 | system person     |           | NULL | Daemon  |  NULL | InnoDB purge employee         | NULL             |    0.000 |
|   3 | system person     |           | NULL | Daemon  |  NULL | InnoDB purge employee         | NULL             |    0.000 |
|   4 | system person     |           | NULL | Daemon  |  NULL | InnoDB purge employee         | NULL             |    0.000 |
|   5 | system person     |           | NULL | Daemon  |  NULL | InnoDB shutdown handler     | NULL             |    0.000 |
|  37 | event_scheduler | localhost | NULL | Daemon  | 13949 | Ready for subsequent activation | NULL             |    0.000 |
| 411 | root            | localhost | NULL | Question   |     0 | Init                        | present processlist |    0.000 |
+-----+-----------------+-----------+------+---------+-------+-----------------------------+------------------+----------+
7 rows in set (0.000 sec)

Occasion inserted and enabled

MariaDB [integrity]> present eventsG;
*************************** 1. row ***************************
                  Db: integrity
                Title: DELETE_EXPIRED_SESSIONS
             Definer: phpmyadmin@localhost
           Time zone: SYSTEM
                Sort: RECURRING
          Execute at: NULL
      Interval worth: 15
      Interval area: MINUTE
              Begins: 2019-04-10 00:00:00
                Ends: NULL
              Standing: ENABLED
          Originator: 1
character_set_client: utf8mb4
collation_connection: utf8mb4_unicode_ci
  Database Collation: utf8mb4_general_ci
1 row in set (0.001 sec)

Occasion question appears to be okay

MariaDB [integrity]> present create occasion delete_expired_sessionsG;
*************************** 1. row ***************************
               Occasion: DELETE_EXPIRED_SESSIONS
            sql_mode: STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
           time_zone: SYSTEM
        Create Occasion: CREATE DEFINER=`phpmyadmin`@`localhost` EVENT `DELETE_EXPIRED_SESSIONS` ON SCHEDULE EVERY 15 MINUTE STARTS '2019-04-10 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO DELETE FROM `core_sessions` WHERE `core_sessions`.`expiry` <= NOW()
character_set_client: utf8mb4
collation_connection: utf8mb4_unicode_ci
  Database Collation: utf8mb4_general_ci

Different issues to examine?

Thanks for any trace…