Central Admin shows "Upgrade Available" for both servers. Have tried many fixes.

Question

We have a client with two SharePoint 2013 servers. Servers in Farm (Central Admin, System Settings) shows config DB version is 15.0.4551.1001 and both WFE and APP server show status "Upgrade Available"
I'm familiar with this and it typically means that the configuration wizard needs to be run. However I'm having a hard time resolving the message in this instance.
Steps taken so far:
IISRESET on both servers
Attempted to run configuration wizard on both servers (several times). Appears to complete successfully but CA still shows upgrade available.
Ran "PSConfig.exe -cmd upgrade -inplace b2b -force" on both servers.
    -Both return error "Exception: Microsoft.SharePoint.Administration.SPUpdatedConcurrencyException: An update conflict has occurred, and you must re-try this action."
    -PSCDiagnostics log file does not seem to shed any light on the issue
cleared SharePoint configuration cache on both servers
IISRESET
Ran PSConfig command again; no change
Other information:
stsadm -o localupgradestatus shows no updates needed for either server
In Powershell, if I use get-spserver and check the properties of each server, I find the following:
NeedsUpgrade: True for WFE, False for APP
CanUpgrade: False for WFE, True for APP
I haven't found much info on that CanUpgrade property.
Anyone have any thoughts?
Thanks,
Tommy

Answer 1

SharePoint runs the Products Version Job once every 24 hours, which should take care of this issue. But sometimes you need to force it (especially if the job just never ran, or was cancelled, etc.).
I wrote about this cmdlet here, if you want more information on what it does and how it works - http://thesharepointfarm.com/2013/12/the-magic-of-get-spproduct-local/
Trevor Seward
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