Consider the following scenario:
You have two cluster nodes that are running on a Windows Server 2012 R2-based cluster.
You change the network adapter settings on the cluster.
Then a node loses connectivity to the cluster.
You reconnect the node to the cluster before the cluster finishes regrouping.
In this scenario, the regrouping on the cluster cannot be finished, and the connectivity and log messages between the two nodes are lost.
To resolve this issue, install update rollup 2962409. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:
2962409 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: June 2014
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates