Error
Error Code:
HV00M
PostgreSQL Error HV00M: FDW Reply Creation Failure
Description
This error, 'fdw unable to create reply', indicates that PostgreSQL's Foreign Data Wrapper (FDW) could not establish or maintain the necessary communication channel to receive a response from a remote server. It typically arises during operations involving foreign tables when the FDW attempts to interact with an external data source but fails to get a reply.
Error Message
fdw unable to create reply
Known Causes
4 known causesRemote Server Unreachable
The foreign server targeted by the FDW is offline, has crashed, or network connectivity issues prevent PostgreSQL from reaching it.
FDW Server Configuration Errors
Incorrect host, port, authentication credentials, or other connection parameters are specified in the `CREATE SERVER` or `ALTER SERVER` statements for the FDW.
Network Firewall Blockage
A firewall (either local to PostgreSQL or on the remote server) is preventing the necessary port communication between the PostgreSQL server and the foreign data source.
Remote Server Resource Exhaustion
The foreign server is overwhelmed, out of memory, or has too many open connections, preventing it from processing and responding to the FDW request.
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