Transport Node status shows "UNKNOWN"

Products

• VMware NSX

Issue/Introduction

Symptoms:
In a NSX-T Transport Node status shows as "UNKNOWN" under System > Fabric > nodes > HostTransport Nodes > node status

UI throws this error "Transport Node Status summary listing failed" for UNKNOWN Transport nodes

No issues will be noticed with Manager and Controller connectivity

xxxxxx.local> get controllers
 Controller IP    Port     SSL         Status       Is Physical Master   Session State  Controller FQDN
  x.x.x.x    1235   enabled      not used            false              null              NA
  x.x.x.x    1235   enabled      not used            false              null              NA
  x.x.x.x    1235   enabled     connected             true               up               NA

xxxxxx.local> get managers
- x.x.x.x     Connected
- x.x.x.x     Standby
- x.x.x.x     Standby

Environment

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

Cause

Heatmap has two modes "Cache" and "Real-time" to collect Node status. For better performance UI uses "Cache" mode and which occasionally not returns node status.

curl -k -u 'admin' -H "Content-Type: application/xml" -X GET https://<Manager>/api/v1/transport-nodes/<Transport-Node-UUID>/status
Enter host password for user 'admin':
{
  "httpStatus" : "NOT_FOUND",
  "error_code" : 600,
  "module_name" : "common-services",
  "error_message" : "The requested object : TransportNodeStatus/bbd43caf-b9c8-4a96-xxxx-xxxxxxxxxxx could not be found. Object identifiers are case sensitive."

Resolution

It is a known issue and fixed in NSX-T 2.5

Workaround:
Reboot proton server on all the Managers

1. login in to MP server
2. run /etc/init.d/proton restart

Additional Information

Impact/Risks:
Its a Cosmetic UI issues and will not have any impact on data path.