<p>The replica server could not create a scheduled event sent from the primary, halting replication until the issue is resolved.</p>
<p>MySQL Error 1596: ER_SLAVE_CREATE_EVENT_FAILURE appears when a replica cannot create a forwarded EVENT object from the primary. Check EVENT privileges, the event scheduler, and the event’s DEFINER account, then recreate or skip the problematic event to resume replication.</p>
Failed to create %s
Error 1596 fires on a replica (slave) when it tries to execute a CREATE EVENT statement received from the primary and the operation fails. MySQL reports “Failed to create %s,” where %s is the event name, and replication stops with SQL STATE HY000.
The error blocks further row or statement relay, so latency grows and data diverges. Fixing it quickly is critical to avoid extended replication downtime.
The issue surfaces during statement-based or mixed replication when the primary forwards scheduled events to replicas. If the replica lacks permissions, scheduler activation, or matching DEFINER accounts, the CREATE EVENT statement cannot be executed, triggering Error 1596.
Replication halts at the failing event, preventing new changes from reaching the replica. Applications reading from the replica will see stale data, and failover strategies relying on that replica become risky. Swift remediation restores replication health and data consistency.
Error 1596 is usually caused by missing EVENT privilege, disabled event scheduler, nonexistent DEFINER account, conflicting event names, or read-only replica settings. Understanding the root cause guides the correct fix.
The main remedies are: grant EVENT privilege to the DEFINER, enable the event scheduler, create or remap the DEFINER user, drop conflicting events, or temporarily bypass the event in the relay log. After corrective action, restart replication with START SLAVE or START REPLICA.
If the replica is read only, set super_read_only = OFF, run the CREATE EVENT manually, then re-enable read only mode. If the scheduler is off, run SET GLOBAL event_scheduler = ON before restarting replication. If the DEFINER account is missing, create it or edit the event’s DEFINER clause and replicate again.
Always replicate with identical DEFINER accounts on all replicas, keep the event scheduler enabled, and monitor replication for SQL errors. Use row-based replication when events are managed separately, or exclude event creation from binary logs with binlog_ignore_db when appropriate.
Similar replication halts occur with Error 1594 (Relay log read failure) and Error 1290 (The MySQL server is running with the --read-only option). Their fixes involve validating relay logs and adjusting read-only settings respectively.
The DEFINER user present in the CREATE EVENT statement lacks the EVENT privilege on the replica, so MySQL refuses to create the event.
The replica’s global variable event_scheduler is OFF, preventing event creation and execution.
The user specified in the DEFINER clause does not exist on the replica server.
An event with the same name already exists in the target database, causing a duplicate error that surfaces as ER_SLAVE_CREATE_EVENT_FAILURE.
super_read_only or read_only is ON, blocking DDL including CREATE EVENT.
Occurs when the replica cannot read the relay log. Fix by verifying disk, file permissions, and purging damaged logs.
Raised when a write operation is attempted on a read-only server. Disable read_only or super_read_only before applying required DDL.
Appears when the user creating the event is not granted the EVENT privilege. Ensure proper grants to avoid cascading into Error 1596.
No. It only halts the replica where the CREATE EVENT failed. The primary continues to run and log events normally.
Yes, if the scheduled task is not essential on the replica. Use sql_slave_skip_counter = 1, then START SLAVE. Monitor that no follow-up errors appear.
Galaxy’s AI copilot checks replication-related DDL and warns about missing privileges or scheduler settings before you deploy migrations, reducing runtime surprises.
Row-based mode still transfers CREATE EVENT statements unless you filter them. However, row mode avoids some issues tied to DEFINER mismatches.
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