ESXi nodes are reported as "unknown" by the upgrade utility in NSX-T

Products

• VMware NSX

Issue/Introduction

Symptoms:
When a vCenter Server managed host is prepared simultaneously by two flows (one by manual and one by system) then such node is seen twice in upgrade User Interface (UI) and for one instance version is shown as "Unknown".

Environment

VMware NSX-T Data Center
VMware NSX-T Data Center 2.x

Cause

This issue occurs when two flows are invoked in parallel with gap less than few milliseconds. This problem is very rare to appear in practical scenario because time gap will be at least few hundred milliseconds there. In that case, parallel activities are identified and handled correctly by the system without causing duplicates.

Resolution

To resolve this issue, call the REST APIs to get the IDs of duplicate fabric nodes which do not have os_version. And then call the REST APIs to delete them.

API to get the information of all the nodes:

GET https://<NSXMGR_IP>/api/v1/fabric/nodes
 
API to delete particular node:

DELETE https://<NSXMGR_IP>/api/v1/fabric/nodes/<node-id>

For more information, see the NSX for vSphere API Guide.