HCX site-pair disconnected and 443 UI is inaccessible

Products

• VMware HCX

Issue/Introduction

• Site pairing  is reported as disconnected.
• HCX web UI is not accessible.
• HCX 9443 page loads successfully and the services show as running.
• web.log does not show any new information and just reports "Started Purging session. Current Map count 0"

2025-11-26 08:20:07.326 UTC [Timer-0, , , TxId: ] INFO  c.v.v.h.a.SessionPurgingMapSessionRepository- Started Purging session. Current Map count 4161
2025-11-26 08:25:07.326 UTC [Timer-0, , , TxId: ] INFO  c.v.v.h.a.SessionPurgingMapSessionRepository- Started Purging session. Current Map count 2554
2025-11-26 08:30:07.326 UTC [Timer-0, , , TxId: ] INFO  c.v.v.h.a.SessionPurgingMapSessionRepository- Started Purging session. Current Map count 891
2025-11-26 08:35:07.326 UTC [Timer-0, , , TxId: ] INFO  c.v.v.h.a.SessionPurgingMapSessionRepository- Started Purging session. Current Map count 0
2025-11-26 08:40:07.326 UTC [Timer-0, , , TxId: ] INFO  c.v.v.h.a.SessionPurgingMapSessionRepository- Started Purging session. Current Map count 0
2025-11-26 08:45:07.327 UTC [Timer-0, , , TxId: ] INFO  c.v.v.h.a.SessionPurgingMapSessionRepository- Started Purging session. Current Map count 0
2025-11-26 08:50:07.326 UTC [Timer-0, , , TxId: ] INFO  c.v.v.h.a.SessionPurgingMapSessionRepository- Started Purging session. Current Map count 0

Environment

VMware HCX 4.11.0 or lower

Cause

This is due to web-engine service getting hung due to a known issue, which is caused by an entry in the vCenter, that has a vm-id but no associated entity-name for the same.

Resolution

This issue is fixed in VMware HCX 4.11.1 and above.

Reference: HCX 4.11.1 Release notes

As a temporary workaround, users can restart web-engine service on hcx. However the threads will start piling up again depending on the usage.