Hello, I have a Cassandra cluster running with 2.1.16 version of Cassandra, where I have decommissioned few nodes from the cluster using "nodetool decommission", but I see the node IPs in UNREACHABLE state in "nodetool describecluster" output. I believe they appear only for 72 hours, but in my case I see those nodes in UNREACHABLE for ever (more than 60 days). Rolling restart of the nodes didn't remove them. any idea what could be causing here?
Note: I don't see them in the nodetool status output.
