“internal error has occurred failed to serialize response : VMware vSphere 5″ May 18, 2012Posted by vbry21 in VMware blogs.
An internal error has occurred: failed to serialize response VMware vSphere 5.0
On our VMware ICM and Fast Track courses we do a lab that gets the delegates to use the MAP view within the Storage Views Tab, within the vSphere Client.
Quite often we get the error message an “internal error has occurred failed to serialize response”
After some research, I found the document which is linked below.
So after some reading I found the section.
“This problem affects only those ESXi hosts that have been added to vCenter Server without any previous software FCoE configuration. After you enable software FCoE adapters on these hosts, attempts to display Storage Maps in the vSphere Client fail. The following error message appears: An internal error has occurred: Failed to serialize response.”
“Workaround: Configure software FCoE on the ESXi host first, and then add the host to vCenter Server.”
Now we don’t use software FCoE, but we do use software iSCSI, so I think it must relate to software iSCSI.
The fix for the delegates is to remove the host from vCenter and then re-add host and this always fixes the issue (a bit extreme, but it works), the issue will come with distributed virtual switches and templates. The host will need to be removed from the distributed virtual switches and then re-added and the templates will need to be re-added to the inventory.
To re-add template, locate the storage containing the template, find the .VMTX file and then right-click and add to inventory.