EC
1199
MySQLERRORNotableReplicationHIGH confidence

Operation requires a running slave

Production Risk

Low — replication is paused; verify and restart.

What this means

ER_SLAVE_NOT_RUNNING (1199, SQLSTATE HY000) is returned when a command requires active replication threads but the slave is not running.

Why it happens
  1. 1Attempting replication-dependent operations while slave threads are stopped
  2. 2Slave stopped due to error and not restarted
How to reproduce
trigger — this will error
trigger — this will error
STOP SLAVE;
-- Attempt operation that needs running slave
START SLAVE UNTIL MASTER_LOG_FILE='...';

expected output

ERROR 1199 (HY000): This operation requires a running slave; configure slave and do START SLAVE

Fix

Start the slave threads

Start the slave threads
START SLAVE;
SHOW SLAVE STATUSG

Why this works

Ensure replication is configured and running before executing replication-dependent commands.

Version notes

Sources
Official documentation ↗

MySQL 8.0 — 1199 ER_SLAVE_NOT_RUNNING

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