>>>>Just wondering if you started from this blog post http://blogs.msdn.com/b/john_daskalakis/archive/2014/09/05/how-to-install-a-service-pack-at-a-sql-server-2012-failover-instance-best-practices.aspx
>>>>
>>>>I think I recently saw a similar problem on MSDN - was it yours?
>>>Hi Naomi,
>>>
>>>Thank you for your reply!
>>>
>>>I just looked at the blog post. This is a new SQL install on a new cluster (not yet used for any DBs). Everything else was in place as listed on the blog. The MSDN post was not mine. Interesting that this seems to be a repeated problem. Did the post have any answers?
>>
>>It did have some answers but I don't recall specifics right now. Can you search for it or want me to try finding it (which I tried originally and found the blog instead).
>
>The only article I can find on MSDN does not contain a solution, but has a few suggestions:
>
>https://social.msdn.microsoft.com/Forums/en-US/6475a640-ebf1-49c1-91af-59783731d83e/failure-to-install-sql-server-2012-sp1-cu89-with-a-failed-to-retrieve-data-for-this-request?forum=sqlsetupandupgrade
>
>This does not seem to have any cluster issues. Note that I installed the 1st node OK, just not the 2nd node.

I'll try to search more because I remember seeing a quite recent thread (about a month at most). But I don't recall the details :(

Found it by checking threads in the forum for few days in Setup & Upgrade - but not sure if it in any way applies to you.

https://social.msdn.microsoft.com/Forums/en-US/5bb86beb-ae33-4a3c-bbfc-636f7828448f/sql-server-2014-installation-errors?forum=sqlsetupandupgrade