After updrading to LTS 2.222.1 version we are seeing 504 Gateway timeouts on Jenkns , where it is running on EKS with custom Dockerfile with base image amazonlinux. we are using ingress with elb . after a refresh it automatically loading page . we are using SAML okta authentication. nothing found so far in logs .
Do you see the login page? Or the main page of Jenkins? Do it happens to all users?
Did you check the ingress ELB logs? Did you try to connect locally from the pod?
That 503 is returned by ingress, if there is nothing in the Jenkins logs I will said that it is something between ingress and Jenkins , In any case I do not see the relation with the SAML plugin.