pgAdmin 4 Server Could Not Be Contacted: Troubleshooting Guide

Introduction

This error message indicates that the connection between the pgAdmin client and the pgAdmin server has been blocked. There are several reasons why this might occur.

Common Causes and Solutions

1. Firewall: Verify that the firewall on both the client and server machines is configured to allow connections on the high ports used by pgAdmin (typically port 5432 for the server and 5433 for the client).
2. Network Connectivity: Ensure that the client and server machines are connected to the same network and that there are no network issues blocking communication.
3. Port Misconfiguration: Check that the client and server ports are correctly configured and that the server is listening on the specified ports.
4. User Permissions: Verify that the user attempting to connect to the server has the necessary permissions to access the database.

Additional Troubleshooting Steps

• Restart the pgAdmin server and client applications.
• Check the pgAdmin log files for any error messages that might provide additional clues.
• Contact the database administrator or system support for assistance.

Further Resources

• pgAdmin FAQ
• pgAdmin Wiki
• pgAdmin 4 Server Could Not Be Contacted