I wish I came across these threads earlier. Our organization just spun up Enterprise for the first time at 10.9.1. Everything was great! We had no users at the time (just test users). 11.0 came out and we figured we would upgrade since it was light weight with no real users. Everything was fine in 11.0. Well we went ahead and decided to upgrade to 11.1 since it was a "long term" release and had some new resources. We still had very few users on it. We upgraded and tested for 2 weeks before we deleted the VM snapshots. Shortly after, we started noticing that our data would freeze. At the same time, the ArcGIS Server Manager page wouldn't load, it would just sit there spinning and sometimes erroring out. It was a complete roller coaster. It could be down for seconds and sometimes minutes (22 minutes one time). this would happen only when we had maps and apps up with data. Portal/Portal admin and datastore software was fine and accessible, although when you clicked on a feature layer/map image to view it, there would be no data there and item details were inaccessible.
I still have a support ticket open. We've checked permissions across the 3 virtual machines/software, certificates, web adaptor pooling resources (which they had my increase some numbers), ruled out our DNS/aliasing as an issue. I had our IT guys throw more cores at it (testing) and it seemed to work for a week and came back just recently. I turned off all shared and dedicated instances on the server and still happened with only copied data.
Very frustrating to work with this new software. Unfortunately we have to downgrade to 11.0 and do not have snapshots anymore, just a portal backup file that was created during the upgrade process. Most of the time lost here is working with support to fix this issue and trying fixed ourselves. Very disappointed customer here.
