Error
Error Code:
1042
MySQL Error 1042: Hostname Resolution Failure
Description
Error 1042 indicates that the MySQL server failed to determine the hostname of the client attempting to connect. This typically occurs during the connection handshake when the server performs a reverse DNS lookup on the client's IP address, which is essential for certain authentication or logging procedures.
Error Message
Can't get hostname for your address
Known Causes
4 known causesDNS Resolution Issues
The MySQL server's configured DNS servers are unavailable, misconfigured, or unable to correctly resolve the client's IP address to a hostname.
Missing PTR Record
The client's IP address does not have a corresponding PTR (pointer) record in the DNS, which is necessary for a successful reverse DNS lookup.
Network/Firewall Blockage
A firewall or other network device between the client and server is blocking the necessary DNS queries or preventing the server from reaching the DNS resolver.
Local Hostname Misconfiguration
The `/etc/hosts` file or similar local hostname configuration on the MySQL server itself is incorrect or lacks an entry for the client's IP.
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