Error: "Error caused vCenter Server disconnect ... invocation failed with "java.net.SocketException: Network is unreachable (connect failed)"

Products

• VMware Cloud Director

Issue/Introduction

• vCenter frequently disconnecting from VMware Cloud Director (VCD).
• The following error is repeatedly occurring:
  
  Error caused vCenter Server disconnect - https://<vcenter>/sdk/vimService invocation failed with "java.net.SocketException: Network is unreachable (connect failed)"

Environment

• VMware Cloud Director 10.6.1

Cause

The disconnects are caused by intermittent connectivity failures in the management network, preventing VCD from reaching the vCenter Server API endpoint.

Resolution

Engage with your network team and run the below curl command from each VCD cell to test connectivity to the vCenter SDK endpoint:

• curl -v telnet://<vcenter>:443