ESXi upgrade to 7.x fails with PSOD while "loading nfsclient"

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:
While Upgrading HPE simplivity Host from 6.7 to 7.x, upgrade fails with PSOD while the installer is at "loading nfsclient"

You may find the below instances on the "configstore-upgrade.log (ESXI: /var/run/log)

yyyy-mm-ddT00:00:00.000Z In(05) host-2097945 [ConfigStore:364833206272:] [2097945][/usr/lib/vmware/configmanager/upgrade/lib/libupgradenfsv41config.so] Invok
ing upgrade.
yyyy-mm-ddT00:00:00.000Z In(05) host-2097945 [ConfigStore:364833206272:] [2097945][/usr/lib/vmware/configmanager/upgrade/lib/libupgradenfsv41config.so] Invok
ing UpgradeConfig
yyyy-mm-ddT00:00:00.000Z Er(02) host-2097945 [ConfigStore:364833206272:] [1083]Validation Error: '/username' String length longer than maximum: 20
yyyy-mm-ddT00:00:00.000Z Er(02) host-2097945 [ConfigStore:364833206272:] [1089] Failed to validate Set
yyyy-mm-ddT00:00:00.000Z In(05) host-2097945 [ConfigStore:364833206272:] ConfigStoreException: [context]zKq7AVICAgAAACzgJAEJY29uZmlnc3RvcmUAAFK3AGxpYmNvbmZpZ3N0b3JldXBncmFkZS5zbwAAPLsAAdQcB2xpYmNvbmZpZ3N0b3JlLnNvAAHekgMBQGUGArk7AGxpYnVwZ3JhZGVuZnN2NDFjb25maWcuc28AA7geAGNvbmZpZ1VwZ3JhZGVSdW5uZXIABI0cAmxpYmMuc28uNgADLSIA[/context]
yyyy-mm-ddT00:00:00.000Z Er(02) host-2097945 [ConfigStore:364833206272:] [2097945][/usr/lib/vmware/configmanager/upgrade/lib/libupgradenfsv41config.so] Upgrade failed rc: 1

Environment

VMware vSphere ESXi 7.x

Cause

• The max length of nfs41 username allowed in configstore is 20.
• The /nfs41/user = "[email protected]" username specified by customer during the simplivity plugin installation was having more than 20 characters under etc/vmware/esx.conf .

Resolution

->Use a different user name which has less than or equal to 20 characters, for Simplivity plugin deployment.

->Update the same user in  /etc/vmware/esx.conf

Impact/Risks:
Upgrade will fail until this value is changed to less than or equal to 20 characters

Additional Information