INFO [main] 2018-03-20 17:48:49,421 OutboundTcpConnection.java:108 - OutboundTcpConnection using coalescing strategy DISABLED
ERROR [main] 2018-03-20 17:49:20,497 CassandraDaemon.java:708 - Exception encountered during startup
java.lang.RuntimeException: Unable to gossip with any seeds
at org.apache.cassandra.gms.Gossiper.doShadowRound(Gossiper.java:1423) ~[apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.service.StorageService.checkForEndpointCollision(StorageService.java:551) ~[apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.service.StorageService.prepareToJoin(StorageService.java:807) ~[apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:667) ~[apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:613) ~[apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:379) [apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:602) [apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:691) [apache-cassandra-3.11.2.jar:3.11.2]
INFO [StorageServiceShutdownHook] 2018-03-20 17:49:20,511 HintsService.java:220 - Paused hints dispatch
WARN [StorageServiceShutdownHook] 2018-03-20 17:49:20,516 Gossiper.java:1548 - No local state, state is in silent shutdown, or node hasn't joined, not announcing shutdown
Update the localhost and 127.0.0.1 to IP
root@ubuntu-Virtual-Machine:/home/ubuntu# grep "192" /etc/cassandra/cassandra.yaml
- seeds: "192.168.1.111"
# The default value is the smaller of 8192, and 1/4 of the total space
# commitlog_total_space_in_mb: 8192
listen_address: 192.168.1.111 #uncomment this too and change localhost to 192.168.1.111
root@ubuntu-Virtual-Machine:/home/ubuntu#
https://stackoverflow.com/questions/20690987/apache-cassandra-unable-to-gossip-with-any-seeds