Upgrade from 11.3 to 11.4 broke shared instances

[tcaulum_WPPI]

I recently upgraded our environment from 11.3 to 11.4.  I keep up with latest releases as best I can, usually within a month or two. It's not a complicated setup so upgrades are straightforward.  This time, after what looked like a successful upgrade, most of our services were not accessible. 

I attempted the upgrade twice with the same result before realizing only the shared instances were not loading or accessible via REST.  I searched for any reason at all why this is happening but found nothing.  On a whim, I changed the settings for our shared instances from 8 shared instances per machine to 4.  For some reason this fixed it.  I even changed it back to 8 and everything is working fine.  

Just wanted to make a post in case anyone else found this same issue. 

[Yogesh_Chavan]

Hi @tcaulum_WPPI,

What was this setting before the upgrade? Do you recall if this count was different in 11.3 and upgrading to 11.4 changed this to default or something else?

Also, as a side question, we are on 11.3 and as per the docs ESRI had updated its licensing for ArcGIS Pro, and also updating user types with new names and feature. Does it impact in any ways with the upgrade process? Or its the usual workflow we can follow for an successful upgrade?