<p>The replication heartbeat period you requested is negative or exceeds the maximum value allowed by MySQL.</p>
<p>MySQL Error 1624 ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE means the replication heartbeat period you set is below zero or above 4294967 seconds. Use CHANGE REPLICATION SOURCE TO (or CHANGE MASTER TO in older versions) with a valid MASTER_HEARTBEAT_PERIOD to fix the issue.</p>
The requested value for the heartbeat period is either
The server rejects the requested heartbeat interval because it is negative or larger than the maximum of 4294967 seconds.
Heartbeat keeps replicas responsive during idle periods. An invalid value blocks the START REPLICA or CHANGE REPLICATION SOURCE TO command, stopping replication from starting.
The message shows up immediately after issuing CHANGE REPLICATION SOURCE TO MASTER_HEARTBEAT_PERIOD = N or during START REPLICA if the value was stored previously.
It also surfaces when editing my.cnf or my.ini with replica_heartbeat_period and then restarting the replica.
Replication will not begin until the parameter is corrected, halting data flow, risking data drift, and delaying failover or read scaling.
Negative heartbeat values, typos adding extra zeros, unit confusion between seconds and microseconds, version mismatches, or default settings from configuration templates trigger the fault.
Setting MASTER_HEARTBEAT_PERIOD larger than 4294967 seconds (about 49 days) exceeds the permitted range.
Supply a positive number from 1 to 4294967 for MASTER_HEARTBEAT_PERIOD in CHANGE REPLICATION SOURCE TO or adjust replica_heartbeat_period in configuration files.
Restart replication after the correction to confirm resolution.
Accidental negative sign: remove the minus and reissue the command.
Copied template with huge value: lower it to 30 or 60 seconds.
Validate heartbeat parameters in CI pipelines, store sane defaults (5-30 seconds), and monitor replica error logs for early warning.
Galaxy users can embed parameter checks in saved setup scripts, ensuring every teammate applies safe values.
Error 1201 Got fatal error 1236 from master: This occurs when binlog coordinates are wrong. Reset or reposition the replica.
Error 1202 Slave relay log read failure: Often caused by missing or corrupt relay logs. Purge and re-sync the replica.
A minus sign is mistakenly typed before the numeric value.
The supplied number is above 4294967 seconds, triggering range validation.
Milliseconds or microseconds are entered instead of seconds, inflating the figure.
Older MySQL versions expect CHANGE MASTER TO but new scripts use CHANGE REPLICATION SOURCE TO.
Indicates relay log read problems; often fixed by purging and re-fetching relay logs.
Signals write issues to the relay log, usually due to disk or permission errors.
Occurs when the replica cannot read the master's binary log at the specified position.
The upper limit is 4294967 seconds, roughly 49.7 days.
No, issuing STOP REPLICA and START REPLICA is sufficient.
No, zero is treated as invalid and will raise error 1624.
Galaxy lets teams save validated replication setup scripts, preventing accidental misconfiguration across environments.
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