Hello, We recently upgraded a cluster from 2.0.12 to 2.0.15 and now whenever we stop/kill a cassandra process, some other nodes keep a connection with the dead node in the CLOSE_WAIT state on port 7000 for about 5-20 minutes.
So, if I start the killed node again, it cannot handshake with the nodes which have a connection on the CLOSE_WAIT state until that connection is closed, so they remain on the down state to each other for 5-20 minutes, until they can handshake again. I believe this is somehow related to the fixes CASSANDRA-8336 and CASSANDRA-9238, and also could be a duplicate of CASSANDRA-8072. I will continue to investigate to see if I find more evidences, but any help at this point would be appreciated, or at least a confirmation that it could be related to any of these tickets. Cheers, -- *Paulo Motta* Chaordic | *Platform* *www.chaordic.com.br <http://www.chaordic.com.br/>* +55 48 3232.3200
