Some cassandra nodes in cluster are unreachable even all the nodes are up and running

Question

I have cassandra cluster of 6 nodes on ec2 , Many times i have observed that all the nodes in the cluster are up and running but when i do the describe cluster from client it shows some nodes as unreachable.

1. I can login to individual machines

2. can connect to cassandra node with cassandra client

3. can connect to individual nodes with JMX.

Answer 1

sounds like you have listen_address/broadcast_address misconfigured.