NVP vProxy: VM backups failing with the error "Host unavailable"

Summary: VM backups failing with the error "Host unavailable. Host is either in maintenance mode, not powered on or not connected. Snapshot functionality disabled."

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Symptoms

VM backups performed through the NetWorker VMware Protection (NVP) vProxy appliance fail with the below error in the backup session log:

Host unavailable. Host <ESXi host> is either in maintenance mode, not powered on or not connected. Snapshot functionality disabled.

Backup session logs can be found on the NetWorker server under:

  • Linux: /nsr/logs/policy/POLICY_NAME/WORKFLOW_NAME/
  • Windows: C:\Program Files\EMC NetWorker\nsr\logs\policy\POLICY_NAME\WORKFLOW_NAME\

Or on the vProxy under:

  • /opt/emc/vproxy/runtime/logs/recycle/vbackupd/DATE/

 

Cause

The VMware ESXi host is in maintenance mode or powered off.

 

Resolution

  1. Power on the ESXi host manually or remove from maintenance mode.
  2. Migrate the VM residing on the host (that is in maintenance mode) to another powered on ESXi host.

 

Article Properties
Article Number: 000186049
Article Type: Solution
Last Modified: 26 يونيو 2026
Version:  3
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