INFO  18:38:01  OutboundTcpConnection using coalescing strategy DISABLED
ERROR 18:38:32  Exception encountered during startup
java.lang.RuntimeException: Unable to gossip with any seeds
	at org.apache.cassandra.gms.Gossiper.doShadowRound(Gossiper.java:1337) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at org.apache.cassandra.service.StorageService.checkForEndpointCollision(StorageService.java:541) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at org.apache.cassandra.service.StorageService.prepareToJoin(StorageService.java:789) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:721) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:612) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:389) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at com.datastax.bdp.server.DseDaemon.setup(DseDaemon.java:335) ~[dse-core-4.8.4.jar:4.8.4]
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:564) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at com.datastax.bdp.DseModule.main(DseModule.java:74) [dse-core-4.8.4.jar:4.8.4]
java.lang.RuntimeException: Unable to gossip with any seeds
	at org.apache.cassandra.gms.Gossiper.doShadowRound(Gossiper.java:1337)
	at org.apache.cassandra.service.StorageService.checkForEndpointCollision(StorageService.java:541)
	at org.apache.cassandra.service.StorageService.prepareToJoin(StorageService.java:789)
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:721)
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:612)
	at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:389)
	at com.datastax.bdp.server.DseDaemon.setup(DseDaemon.java:335)
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:564)
	at com.datastax.bdp.DseModule.main(DseModule.java:74)
Exception encountered during startup: Unable to gossip with any seeds
INFO  18:38:32  DSE shutting down...
INFO  18:38:32  All plugins are stopped.
ERROR 18:38:32  Exception in thread Thread[Thread-2,5,main]
java.lang.AssertionError: null
	at org.apache.cassandra.gms.Gossiper.addLocalApplicationStateInternal(Gossiper.java:1407) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at org.apache.cassandra.gms.Gossiper.addLocalApplicationStates(Gossiper.java:1431) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at org.apache.cassandra.gms.Gossiper.addLocalApplicationState(Gossiper.java:1421) ~[cassandra-all-2.1.12.1046.jar:2.1.12.1046]
	at com.datastax.bdp.gms.DseState.setActiveStatusSync(DseState.java:252) ~[dse-core-4.8.4.jar:4.8.4]
	at com.datastax.bdp.server.DseDaemon.preStop(DseDaemon.java:426) ~[dse-core-4.8.4.jar:4.8.4]
	at com.datastax.bdp.server.DseDaemon.safeStop(DseDaemon.java:436) ~[dse-core-4.8.4.jar:4.8.4]
	at com.datastax.bdp.server.DseDaemon$1.run(DseDaemon.java:676) ~[dse-core-4.8.4.jar:4.8.4]