Issue Summary

Discovery ESXi_HostSystems pattern is unable to retrieve S/N if Bios manufacturer is missing to be retrieved in the Vcenter interface

This is reproducible on Data Center: yes

Steps to Reproduce

When enabling ESXi_HostSystems pattern and scanning ESX servers the serial number is not retrieved by the discovery tool and this only happen when in VCenter itself those hosts misses the BIOS-Manufacturer info.

When Bios manufacturer is available in Vcenter S/N is set and we see follow in Discovery logs:

Set HostSystem.UUID value from: Hardware.SystemInfo.UUID
Set HostSystem.Serialnumber value from: Hardware.SystemInfo.SerialNumber
Set extended information Asset Tag value from: HostSystemIdentificationInfo.OtherIdentifyingInfo (asset)
Set extended information Service Tag value from: HostSystemIdentificationInfo.OtherIdentifyingInfo (service)

When Bios manufacturer is not available in Vcenter, then the S/N retrieval step is missing from logs:

Set HostSystem.UUID value from: Hardware.SystemInfo.UUID
Set extended information Asset Tag value from: HostSystemIdentificationInfo.OtherIdentifyingInfo (asset)
Set extended information Service Tag value from: HostSystemIdentificationInfo.OtherIdentifyingInfo (service)

Expected Results

S/N should be retrieved from ESX server BIOS as well.

Actual Results

S/N is not retrieved when BIOS manufacturer is missing.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available