Troubleshoot vCenter Server service problems when the UI is unavailable, tasks fail or ESXi hosts stop responding to vCenter.
01 Confirm the symptom
06 Validate recovery Confirm the UI, API, inventory updates and ESXi communication are functioning before closing the incident.
Determine whether the issue affects the UI, API, authentication, inventory or all vCenter functions. Check whether ESXi hosts remain reachable directly.
Confirm the symptom
Check service state
Review the vCenter service status and recent startup or restart events. Avoid repeated restarts before identifying the failing dependency.
Check resources
Review CPU, memory and disk usage on the vCenter appliance. A full filesystem can cause multiple services to fail.
Check certificates
Review certificate validity when login, service startup or host communication fails around a certificate event.
Review logs
Use vCenter service logs to identify database, certificate, authentication or network errors. Capture timestamps that match the user-facing failure.
Validate recovery
Confirm the UI, API, inventory updates and ESXi communication are functioning before closing the incident.
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