EC
1729
MySQLERRORNotableReplicationHIGH confidence

MASTER_DELAY value is out of the valid range

Production Risk

Low — configuration change fails; replication delay unchanged.

What this means

The value specified for MASTER_DELAY in a CHANGE MASTER TO statement is negative or exceeds the maximum allowed value of 2^31 − 1 seconds.

Why it happens
  1. 1Specifying a negative or excessively large MASTER_DELAY value.
How to reproduce
trigger — this will error
trigger — this will error
CHANGE MASTER TO MASTER_DELAY = -1;

expected output

ERROR 1729 (HY000): The requested value -1 for the master_delay exceeds the maximum/minimum.

Fix

Specify a valid delay value in seconds

Specify a valid delay value in seconds
STOP SLAVE SQL_THREAD;
CHANGE MASTER TO MASTER_DELAY = 3600; -- 1 hour delay
START SLAVE SQL_THREAD;

Why this works

A valid non-negative integer within range is accepted; 0 disables the delay.

What not to do

✕

Sources
Official documentation ↗

MySQL 8.0 — 1729 ER_MASTER_DELAY_VALUE_OUT_OF_RANGE

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