I/O Error: Unable to Resolve Hostname 'epic-config' - Java.net.UnknownHostException

This error message indicates that the hostname 'epic-config' could not be resolved, preventing a successful connection to port 3901 on the specified host. This issue can stem from several potential causes:

1. Hostname Misspelling: Double-check the accuracy of the hostname spelling. Consider using the IP address instead of the hostname for connection.

2. DNS Resolution Issues: If using a hostname, there may be DNS resolution problems. Try using an alternative hostname or IP address for the connection.

3. Network Connectivity Problems: Network instability or blocking by firewalls or security mechanisms might be hindering the connection. Examine your network connectivity status and security settings.

To address this issue, try these steps:

1. Verify Hostname Spelling: If using a hostname, ensure it is spelled correctly. Consider using the IP address instead of the hostname for connection.

2. Confirm DNS Resolution: Use the 'nslookup' command to verify if the hostname resolves successfully.

3. Verify Network Connectivity: Use the 'ping' command to confirm if the target host is responding correctly.

4. Check Security Settings: If using firewalls or other security measures, verify that connections to the specified host are allowed.

If these solutions don't resolve the issue, reach out to your network administrator or technical support team for assistance.