Network Unextension stuck at 15%, 'Configuration received <Network name>, Disconnecting vnics on remote side.' - VMware HCX

Products

• VMware HCX

Issue/Introduction

• From HCX UI, when a network un-extension is triggered, task stuck at 15%.
• Error status: 'Configuration received <Network name>, Disconnecting vnics on remote side'.
• From the cloud end, the task is already in 'Failed' status.
  
  
• The following error may be observed in the file /common/logs/admin/web.log:
  

  <Time Stamp> UTC [https-jsse-nio-127.0.0.1-8443-exec-4, Ent: HybridityAdmin, , TxId: TxId: ########-####-####-####-############] ERROR c.v.v.h.api.registration.CloudConfig- Login to https://<HCX FQDN>. Reason:  ConnectTimeoutException

  Note: The log lines are only for reference; the timestamp and the connection failure reason may vary.

Environment

VMware HCX

Cause

While initiating a network un-extension task from HCX, the backend real-time site pairing connectivity is validated.
In case the "site pairing is in disconnected/down" status, the behaviour is expected.

Resolution

1. Fix site pairing connectivity, which should resume the un-extension task.
2. If one site is in a failed state and the other site task is stuck, a Force unextend option can be triggered, which will forcefully initiate a "un-extension" task irrespective of validating the site pairing at the backend.
   
   Note: Do not initiate multiple un-extension tasks; this may lead to a stale job queue behaviour.