Hi,
Did you ever figure this out? I have the same issue.
I have 11 vCenters, all equivalent config, all VC 5.1U1b.
10 are fine, 1 is showing this issue. The 1 with a problem has approx 1200 datastores, all the others are under 700. I'm wondering if its actually the number of paths that is the issue rather than the number of datastores given the error is in "PopulateMultipathingEntityTask"
How many paths do you have to each datastore? We have 4 paths to a lot of them so our total paths will be over 3000 on the problem VC.
I'm not aware of any vcenter limit for datastores, there is for vCloud (1024) but that's not applicable here.
Thanks.