Redundant nodes from a restored Datacenter listed on System Info page

Summary

Redundant nodes from a restored Datacenter are listed under the Cluster Nodes section on the System Info page. The problem would happen if:

1. after an XML System restore.
2. rename from one node to another.
3. node was removed completely.

Steps to Reproduce

1. Setup a data center with cluster nodes named tnode1, tnode2 for instance
2. Restore an XML backup from another data center where nodes are named as node1, node2

Expected Results

Cluster nodes information in the database is refreshed after the changes on the nodes.

Actual Results

• Cluster nodes section of the System info page show the actual expected nodes, together with the nodes that was removed or changed. All node states appear active, but not alive. See screenshot:
  
• After a restart of nodes, the actual nodes come alive, but the redundant nodes still appear active. See screenshot:
  

Workaround

See workaround section in JRASERVER-42916: Old node ids should get removed in JIRA Data Center