A major upgrade of the ESXi code on an existing vSAN cluster was just completed.
Upon logging on to the vSphere Web Client, the vSphere administrator encounters UI timeouts on vSAN specific menus.
What could cause this?
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A. B. C. D.C.
After a major upgrade of the ESXi code on an existing vSAN cluster, encountering UI timeouts on vSAN specific menus when logging on to the vSphere Web Client could be caused by various factors.
Option A, vSphere Update Manager being offline, is unlikely to be the cause of the UI timeouts on vSAN specific menus. vSphere Update Manager is responsible for managing and automating the patch and upgrade process for ESXi hosts and virtual machines, but it does not directly affect the vSAN cluster or the vSphere Web Client UI.
Option B, vSAN Performance Service being offline, is a possible cause of the UI timeouts on vSAN specific menus. The vSAN Performance Service is responsible for collecting performance data for the vSAN cluster, and if it is offline or not functioning properly, it can cause delays or timeouts when accessing vSAN-specific menus in the vSphere Web Client.
Option C, vCenter Server has yet to be upgraded, is also a possible cause of the UI timeouts on vSAN specific menus. If the vCenter Server has not been upgraded to a version compatible with the upgraded ESXi code on the vSAN cluster, it can cause issues with accessing vSAN-specific menus in the vSphere Web Client.
Option D, vSAN on-disk format has yet to be upgraded, is also a possible cause of the UI timeouts on vSAN specific menus. After upgrading the ESXi code on the vSAN cluster, it is necessary to upgrade the on-disk format of the vSAN datastore to ensure compatibility with the new version of ESXi. If the on-disk format has not been upgraded, it can cause issues with accessing vSAN-specific menus in the vSphere Web Client.
In summary, the possible causes of UI timeouts on vSAN specific menus after a major upgrade of the ESXi code on an existing vSAN cluster are: vSAN Performance Service being offline, vCenter Server has yet to be upgraded, and vSAN on-disk format has yet to be upgraded.