"Cluster Name" information is lost in settings when adding the index node to the cluster.
Removed and rebalanced out 2 query service & 2 index service nodes. On adding back a single node having a query service and index service. "Cluster Name" which was already set in the settings was lost.
The problem occurs when adding a node having Index Service. I was able to reproduce this issue in my local environment and below are the steps for reproduction.
1. Provision a cluster and just add a data service node.
2. Set the "cluster name" in cluster settings.
3. Add index service node. Without rebalancing, check the "cluster name" setting, the "cluster name" setting is lost (After rebalancing also "cluster name" setting is still lost).
In DevTools I can see a POST request on URL: http://<hostname>:8091/pools/default
In the request, ClusterName is not set.