I have upgraded the aks version from 1.14.8 to 1.15.7 and on doing that the I got some error on prometheus node-exporter. There are 2 pods and it says "0/2 nodes are available: 1 node(s) didn't match node selector, 2 node(s) didn't have free ports for the requested pod ports."

Any idea on resolving this issue would be very helpful.