Error
Error Code:
HV00N
PostgreSQL Error HV00N: FDW Remote Server Connection Failure
Description
This error signifies that PostgreSQL's Foreign Data Wrapper (FDW) functionality failed to establish a connection to a remote server. It typically occurs when attempting to query or access data from an external data source defined via FDW, indicating a problem in reaching or authenticating with that remote system.
Error Message
fdw unable to establish connection
Known Causes
4 known causesNetwork Connectivity Issues
The PostgreSQL server cannot reach the remote server due to network problems, such as firewalls blocking the connection, incorrect routing, or the remote server being unreachable on the network.
Incorrect Connection Parameters
The FDW server definition or user mapping contains erroneous connection details like an incorrect host address, port number, database name, username, or password for the remote server.
Remote Server Unavailable or Misconfigured
The remote server itself is either offline, overloaded, or not properly configured to accept incoming connections from the PostgreSQL server, or it may be rejecting the connection attempt.
Authentication or Authorization Failure
The remote server rejected the connection because the provided credentials (username/password) were invalid, or the FDW user lacked the necessary permissions to connect to the remote system.
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