[druid-user] Re: Can I completely rebuid Historical nodes?

It’s a no-nothing architecture. You can add and remove Historicals for fun – just be aware of the time it takes for them to receive the instructions from the coordinator to load all their data, then for them to load it all. That can take time in big clusters.

You might also want to check in on the decommissioning nodes configuration that you can post to the dynamic coordinator config: