Hi,
actually, we have a new Jira SW DC instance with 2 nodes, http load balancer and PostgreSQL 10, all on Oracle Linux 8.4. Routes on load balancer and JVMroute on nodes arguments are set properly according to Atlassian docs.
We face the issue with getting detail info about nodes. Steps to simulate:
1) Go to Jira administration
2)Select Clustering. --> Both nodes are displayed OK with all relevant data (uptime, load, memory...)

3) Select ... on any node and select any item (System information / Custom field indexing / Runtime information).
4) Error page appears, see screenshot.

Anyone faced similar issue? Some hints what to do with it?
Thanks in advance,
Vitek