Error: "A general system error occurred: Host not found (non-authoritative), try again later (2)" while configuring the replication server

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:

While configuring replication with vCenter, we encounter an error as below on VRMS configure page:

A general system error occurred: N7Vmacore15SystemExceptionE Host not found (non-authoritative), try again later (2)

Environment

vSphere Replication 8.x

vCenter Server 8.x

Cause

This is due to the communication issue between the vSphere Replication and the vCenter server using port 8043.

This can be validated by running the below command from the vCenter to the VR and vice versa, it fails with connection refused as shown below:

curl -v telnet://Target IP address:8043 (desired port #)

Example as below: 

esxi#curl -v telnet://x.x.x.x:8043
*   Trying x.x.x.x:8043...
* Failed to connect to x.x.x.x port 8043 after 21051 ms: Couldn't connect to server

Resolution

To resolve this issue, we need to enable the required ports from vCenter to vSphere Replication and vice versa.

The below article has more information on the ports required to be opened between vSphere Replication and vCenter Server for the replication to work.

Port numbers that must be open for vSphere Replication 8.x