VCF 4.1 to VCF 4.2 upgrade fails at ESXi upgrade

[gilpena]

Upgrade from ESXi 7.0.1-16850804 to 7.0u1d failed with message "VMware Update Manager baseline group creation failed". Is there a know resolution for that error?

[viquarhcimca]

as per the Release notes of 4.2 there is one known issue on esxi upgrade. i.e. 

• When you skip hosts during an ESXi upgrade of a vLCM-enabled workload domain, the upgrade may fail

  Due to a known vSphere issue, the ESXi upgrade may fail with a "ConstraintValidationException" error when a host is skipped.

  Workaround: Check the vSphere Client and its logs for details on what caused the error. Resolve the issues and retry the upgrade.

• in your case u  will have to check your lcm.log and esxiupdate.log