Failover Fails with 'No hosts with hardware version' Error Due to DNS Resolution Failure
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Failover Fails with 'No hosts with hardware version' Error Due to DNS Resolution Failure

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Article ID: 440858

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Updated On:

Products

VMware Live Recovery

Issue/Introduction

  • When performing a failover test or planned migration in VMware Live Recovery (formerly Site Recovery Manager), the operation fails with the following error:

No hosts with hardware version 'x' and datastore(s) 'xxxx' which are powered on and not in maintenance mode are available.

  • From the UI when testing for the replication, we see the errors as below.

  • We also see warnings on vSphere replication management UI page  as below.

The vSphere Replication Management Server could not fetch source host (id: '##.##.##.##', name: '#################') health checks endpoint API version. Details:org.springframework.web.reactive.function.client.WebClientResponseException$NotFound: 404 Not Found from GET https://##.##.##.##/hbragent/api/about'.

 

Environment

VMware Live Recovery 9.x

Cause

  • This issue is caused by a DNS resolution failure between the ESXi hosts and the vSphere Replication (VR) appliance.

  • During recovery orchestration, the system must install or verify the hbr-agent VIB on the target ESXi hosts. If the ESXi hosts cannot resolve the Fully Qualified Domain Name (FQDN) of the VR appliance, the VIB installation fails. Because the agent is missing or inactive, the hosts are reported as incompatible or unavailable for the failover task.

  • Upon checking esxi logs for the vib installation, we see errors as below.

We see /var/log/esxupdate.log reporting the below reporting 'Name or service not known'

2026-05-18T08:31:53Z Er(11) esxupdate[84364567]: File "/lib64/python3.11/site-packages/vmware/esximage/Transaction.py", line 981, in _getVibsFromUrls
2026-05-18T08:31:53Z Er(11) esxupdate[84364567]: raise Errors.VibDownloadError(url, None, str(e))
2026-05-18T08:31:53Z Er(11) esxupdate[84364567]: esximage.Errors. VibDownloadError: ('https://#####:443/vib/vmware-hbr-agent. vib', None, "('https://####:443/vib/vmware-hbr-agent.vib', '', '<urlopen error [Errno -2] Name or service not known>')")
2026-05-18T08:31:53Z Db(15) esxupdate[84364567]: <<<

 

Resolution

To resolve this issue, ensure consistent name resolution across the replication infrastructure:

  1. The DNS functionality can be validated using the commands below. 
  2. Take a putty/shell session and check for name resolution using nslookup.

nslookup <VR-Appliance-FQDN>

nslookup <VR-Appliance-IP>

 

Workaround: 

Add the entries for the hostnames for all the related components in /etc/hosts  file on servers including ESXi hosts.
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