Error
Error Code:
HV00B
PostgreSQL Error HV00B: Invalid FDW Handle
Description
The HV00B error 'fdw invalid handle' signifies a problem within a Foreign Data Wrapper (FDW) operation. This typically occurs when PostgreSQL attempts to interact with an external data source, but the FDW's internal connection or session handle is found to be invalid or improperly initialized. It points to an issue in the FDW's ability to manage its connection to the foreign server.
Error Message
fdw invalid handle
Known Causes
3 known causesMisconfigured Foreign Server or User Mapping
The `CREATE SERVER` or `CREATE USER MAPPING` definitions for the FDW contain incorrect parameters or authentication details, preventing a valid connection handle from being established.
Foreign Data Wrapper Extension Issues
The FDW extension itself might not be correctly installed, loaded, or its underlying libraries are missing or incompatible, leading to failures in handle initialization.
Unreachable or Unresponsive Foreign Server
The external data source that the FDW attempts to connect to is either offline, inaccessible due to network issues, or not responding, resulting in the FDW failing to obtain a valid handle.
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