VCF on VxRail: Parallel VxRail Cluster Upgrades Fail: A specified parameter was not correct: extension.key

Summary: Trigger 2 VxRail clusters were upgraded in parallel using Software-Defined Data Center (SDDC) Manager UI. One of the clusters failed with the error "A specified parameter was not correct:extension.key" due to VxRail plugin register failure. ...

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Symptoms

When trigger 2 VxRail clusters upgrade from SDDC manager UI in parallel, one cluster upgrade can register VxRail plugin successfully, while the other fails with error: 
A specified parameter was not correct:extension.key
Below error is observed from the VxRail plugin UI > Updates page:
Screenshot of error message
Below error is observed from the SDDC manager UI > Updates page:
Screenshot of update failure

Cause

If multiple clusters are upgrading the VxRail plugin in vCenter simultaneously, it causes a conflict because they are using the same extension.key (com.vmware.vxrail).

Resolution

Retry the upgrade from the SDDC Manager UI for the failed cluster.
Article Properties
Article Number: 000213316
Article Type: Solution
Last Modified: 15 Aug 2025
Version:  6
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