Extreme slowness and performance degradation when attempting to deploy virtual machines from templates stored in the vCenter Content Library

Products

• VMware vCenter Server

Issue/Introduction

Deployments initiated from the Content Library stall or take an unusually long time to complete. During troubleshooting, a specific virtual machine/template is flagged for failing clone, export, or sync tasks associated with the Content Library

Environment

vCenter 8.0U3

Cause

The performance degradation and task stalling are caused by an orphaned temporary configuration ISO (_deviceImage-0.iso) left attached to the source virtual machine's virtual CD/DVD drive. The Content Library engine times out and fails because it repeatedly tries to read and collect this dynamically generated (but physically missing or locked) file during the cloning process.

When a virtual machine is deployed from an OVA/OVF template or uses vApp properties, vSphere dynamically generates a temporary ISO (_deviceImage-0.iso) to inject network and guest configurations into the OS. If this file is not properly cleaned up, the VM retains a stale pointer to it. When the Content Library attempts to process the VM, it stalls while it tries to locate the file, and eventually throws the following explicit validation error in the vCenter logs:

com.vmware.vapi.std.errors.InvalidArgument ... Parameter value [SPS_0002_####_##] ###########/_deviceImage-0.iso is not valid."

Resolution

To resolve the deployment slowness and clear the error, manually detach the orphaned ISO from the source VM's hardware configuration:

1. Locate the source VM in your vCenter inventory.

2. Right-click the VM and select Edit Settings.

3. Expand the CD/DVD drive section.

4. Change the dropdown menu from "Datastore ISO File" to Client Device.

5. Ensure the Connect At Power On checkbox is unchecked.

6. Click OK to apply the changes.

7. Re-run your Content Library deployment or sync task."