Error
Error Code:
1704
MySQL Error 1704: Heartbeat Exceeds Net Timeout
Description
This MySQL replication error signifies that the `replica_heartbeat_period` is configured to be greater than or equal to the `replica_net_timeout`. This invalid setup prevents the replica from maintaining a stable connection, as its heartbeat, meant to keep the connection alive, is less frequent than the period after which the connection times out.
Error Message
The requested value for the heartbeat period exceeds the value of `replica_net_timeout' seconds. A sensible value for the period should be less than the timeout.
Known Causes
3 known causesInvalid Heartbeat Period
The `replica_heartbeat_period` system variable is explicitly set to a value greater than or equal to `replica_net_timeout`.
Insufficient Network Timeout
The `replica_net_timeout` system variable is explicitly set too low, making it less than or equal to `replica_heartbeat_period`.
Conflicting Default Values
A combination of explicitly set and default values for `replica_heartbeat_period` and `replica_net_timeout` results in the heartbeat period exceeding the timeout.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service