Error
Error Code:
1254
MariaDB Error 1254: Slave Already Running
Description
This error indicates an attempt to start a MariaDB replication slave that is already actively running. It typically occurs when a `START SLAVE` command is issued to a server process that is already performing replication duties, preventing redundant operations.
Error Message
Slave is already running
Known Causes
4 known causesRedundant Start Command
A `START SLAVE` command was executed on a MariaDB server where the replication slave threads are already active and processing events.
Automation Script Misstep
An automated script or tool attempted to start the slave without first verifying its current operational status, leading to an unnecessary command.
Misconfigured Startup Routine
The server's startup script or replication configuration might be set to unconditionally attempt a slave start, regardless of its previous state.
Unexpected Server State
The slave might have started unexpectedly after a server restart or recovery, and a subsequent manual or automated start command was issued.
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