Heartbeating between NSX management node and host <host-UUID> is down.

Products

• VMware NSX

Issue/Introduction

• ESXi host/s are showing "Disconnected" in the NSX UI. 

• Attempts to re-prepare these hosts for NSX fails at 48% completion, indicating the manager connectivity as "Down".
  
  Below is the screenshot of manager connectivity and configuration state of ESXi from NSX UI
  
  

• Running nsxcli -c get managers show only two managers connected, with no asterisk (*) indicating no true connectivity to any manager from the host's perspective.

• Concurrently, nsxcli -c get controllers indicates a disconnected controller with failure reason as 'OTHER_ERROR' , and the ESXi is attempting to connect to the very manager that was noted as missing in the prior get managers output.
  
   

• You see the problem manager's "Manager" service is down in NSX UI

Environment

VMware NSX

Cause

Problem Manager has "Manager" service down

Resolution

• Start/Restart the "Manager" service on the problem manager by entering admin shell and by executing the below command
  
  
  • start service manager
  • restart service manager
    
    
• Try rebooting the problem manager node if the issue persists even after the service restart

Additional Information

If the above steps in this KB do not resolve the issue, raise a support ticket with Broadcom support selecting NSX as the product. 

Handling Log Bundles for offline review with Broadcom support.

• Collect Support Bundles for Troubleshooting VMware NSX
• Uploading files to cases on the Broadcom Support Portal
• Creating and managing Broadcom support cases