During HCX vMotion, Refresh network information task fails

Products

• VMware HCX

Issue/Introduction

• During HCX vMotion, Refresh network information task fails with an error message;
  A general system error occurred: Error: system_error Messages: vapi.invalid.result.code<Recv of frame failed with code: 400 Bad Request>
• VM migration completes and the migrated VM works fine.
• The error is seen on fetching DPU information.
  vpxd.log
  YYYY-MM-DDTHH:MM:SS.sssZ error vpxd[*****] [Originator@6876 sub=MoHost opID=********-****-****-****-************-**] Error while invoking List API to fetch DPU info; hostname: <HCX IX IP>, err: Error:
-->    system_error
--> Messages:
-->    vapi.invalid.result.code<Recv of frame failed with code: 400 Bad Request>
-->
• HCX IX log shows POST request is not supported.
  mobilityagent-**.log
  YYYY-MM-DDTHH:MM:SS.sssZ warning mobilityagent[02393] [Originator@6876 sub=HTTP server] UnimplementedRequestHandler: HTTP method POST not supported for URI /api. Request from <vCenter IP>.

Environment

VMware HCX 4.11

Cause

During HCX vMotion, vCenter refreshes the network configuration of the Mobility Agent host.
It includes query for DPU, but Mobility Agent does not support the query and it results in the error.

Resolution

The error is benign and can be safely ignored.

HCX 9.0 resolves the error during refreshing the network configuration of Mobility Agent hosts.