Lifecycle Manager displays "An unexpected error has occurred."

Products

• VMware vCenter Server

Issue/Introduction

• Attempting to import a depot zip into the Lifecycle Manager via Import Updates fails with the error "An unexpected error has occurred."
• In /var/log/vmware/vapi/endpoint/endpoint.log* reports:
  
  YYYY-MM-DDTHH:MM:SS. | User sessions count is limited to 550. Existing sessions are 550 for user ####@example.com. Please retry the login operation
  
  

Environment

vCenter Server 7.0

Cause

This issue occurs when the maximum user session count is reached on the vCenter Server.

Resolution

Workaround:

Option 1

• Reboot the affected vCenter Server

Option 2

• Login to the vCenter via SSH and restart following service:
  1. Open a console session (ssh enabled) to the vCenter Server Appliance
  2. Log in as the administrator user "root"
  3. Type "shell" and press Enter. Connected
  Connected to service
  * List APIs: "help api list"
  * List Plugins: "help pi list"
  * Launch BASH: "shell"
  Command> shell
  
  service-control --restart vmware-vapi-endpoint
  service-control --restart observability
  service-control --restart observability-vapi

 

Additional Information

• Lifecycle Manager 利用時に"予期しないエラーが発生しました。"と表示される
• https://blogs.vmware.com/cloud-foundation/2022/07/25/endpoint-limits-for-concurrent-rest-requests-from-vcenter-apis/
• Similar issues:
  Error: "User session count is limited to 550. Existing session count is 550 for user" during CIS connection via PowerCLI
  "User session count is limited to 550. Existing session count is 550 for user" during SDDC Manager upgrade precheck or Lifecycle Manager