VMware vSphere Lifecycle Manager had an unknown error. Check the events and log files for detail

This article describes how to troubleshooting the issue.

Summary

VMware vSphere Lifecycle Manager had an unknown error. Check the events and log files for detail.

Resolution 1:-

> My scenario, I disabled lockdown mode option then it works for me.

 

if not resolve the issue first resolution 1 then we can try to resolution 2 following 

Resolution 2:-

 

Please follow the below steps to Reset VMware Update Manager Database to resolve the issue:

Note: Custom baselines (but not Cluster Images), custom download settings and manually imported patches/ISOs will be removed and will need to be reapplied following the reset.

Before applying the steps below, please take a backup or a non-memory snapshot of the vCenter Server Appliance . If the vCenter is part of a Linked Mode replication setup, please backup/snapshot all replicating nodes as well.

Furthermore, please make note of all custom configuration in Update Manager, like proxy settings, third party download URLs, customized baselines, etc. before proceeding.

 

Connect to vCenter Server Appliance via SSH with root

Run the shell command to switch to the BASH Shell:   

 # shell

Stop the VMware Update Manager Service:

# service-control --stop vmware-updatemgr

Run the following command to reset the VMware Update Manager Database: python /usr/lib/vmware-updatemgr/bin/updatemgr-utility.py reset-db

Run the following Command to delete the contents of the VMware Update Manager Patch Store:

# rm -rf /storage/updatemgr/patch-store/*

Start the VMware Update Manager Service:

# service-control --start vmware-updatemgr

Note: log out and log back into vSphere Web Client.