Good Morning
I have 4 Failover clusters. 1 SQL Cluster, 1 HyperV Cluster, 1 IIS Cluster (Not NLB) and 1 File Cluster. All running windows 2012. The File cluster is fully upto date and has all the latest Firmware and Drivers installed and a couple off Windows Hotfixes for Windows Clustering. The Hyper-V and SQL Cluster is scheduled for updates in the couple off weeks but both have been updated within the last couple weeks. The problem I have on all four cluster is after a period off time, we are no-longer able to connect to the cluster from any node in the cluster. What I mean is on the SQL Cluster after a period of time (This might be 3-4 weeks), if I connect to any of the nodes in the SQL Cluster and open fail-over cluster manager I am unable to connect to the cluster. Fail-Over cluster manager first starts with "Connecting to Cluster" "The Operations is taking longer than expected", then after about 2-3 minutes an error comes up saying "The Operations has Failed", "An error occurred connecting to the Cluster '<Cluster-Name'>", If I then click on "See details" I get "An error occurred Trying to Display the cluster information", "One or more errors occurred","Provider load failure".
This same problem happens on all of our windows 2012 Clusters, we do have a 2012 R2 Hyper-V cluster but this is managed by a different team and I don't know if they have the same issue or not.
It seems to be one of the host that is causing the problem, normally the host that has Quorum, and if we reboot that host, which causes the cluster to fail over all the roles to a different node the cluster is then accessible again. Once the node that was rebooted comes back online everything is fine again for a period of time until this problem happens again.
If anyone has any suggest I would be very grate full.
Richard