[4.12] nodeport not reachable port connection timeout

Description of problem:

NodePort port not accessible

Version-Release number of selected component (if applicable):

OCP 4.8.20

How reproducible:

$oc -n ui-nprd get services -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
docker-registry ClusterIP 10.201.219.240 <none> 5000/TCP 24d app=registry
docker-registry-lb LoadBalancer 10.201.252.253 internal-xxxxxx.xx-xxxx-1.elb.amazonaws.com 5000:30779/TCP 3d22h app=registry
docker-registry-np NodePort 10.201.216.26 <none> 5000:32428/TCP 3d16h app=registry

$oc debug node/ip-xxx.ca-central-1.compute.internal
Starting pod/ip-xxx.ca-central-1computeinternal-debug ...
To use host binaries, run `chroot /host`
Pod IP: 10.81.23.96
If you don't see a command prompt, try pressing enter.
sh-4.2# chroot /host
sh-4.4# nc -vz 10.81.23.96 32428
Ncat: Version 7.70 ( https://nmap.org/ncat )
Ncat: Connection timed out.

In a new-created namespaces the same deployment works:

[RHEL7:> oc project
Using project "test-c1" on server "https://api.xx.xx.xxxx.xx.xx:6443".
[RHEL7:- ~/tmp]> oc port-forward service/docker-registry-np 5000:5000
Forwarding from 127.0.0.1:5000 -> 5000

[1]+ Stopped oc4 port-forward service/docker-registry-np 5000:5000
[RHEL7: ~/tmp]> bg %1
[1]+ oc4 port-forward service/docker-registry-np 5000:5000 &
[RHEL7: ~/tmp]> nc -v localhost 5000
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connected to 127.0.0.1:5000.
Handling connection for 5000

[RHEL7: ~/tmp]> kill %1
[RHEL7: ~/tmp]>
[1]+ Terminated oc4 port-forward service/docker-registry-np 5000:5000
[RHEL7: ~/tmp]> oc get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
docker-registry-np NodePort 10.201.224.174 <none> 5000:31793/TCP 68s

[RHEL7: ~/tmp]> oc get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
registry-75b7c7fd94-rx29j 1/1 Running 0 7m5s 10.201.1.29 ip-xxx.ca-central-1.compute.internal <none> <none>
[RHEL7: ~/tmp]> oc debug node/ip-xxx.ca-central-1.compute.internal
Starting pod/ip-xxxca-central-1computeinternal-debug ...
To use host binaries, run `chroot /host`
Pod IP: 10.81.23.87
If you don't see a command prompt, try pressing enter.
sh-4.2# chroot /host
sh-4.4# nc -v 10.81.23.87 31793
Ncat: Version 7.70 ( https://nmap.org/ncat )
Ncat: Connected to 10.81.23.87:31793.

Actual results:

• Working on new created namespace
• Not working on already created namespace

Expected results:

• Suppose to work on all namespaces.

Additional info:

• This cluster get upgrade from 4.7.x to 4.8 and then they manually enable OVN.
• The issue was happening on all namespaces but after restarting the ovnkube-master-xxxx pods only the newly created namespaces work.