NPE when you mistakenly set listen_address to 0.0.0.0

 INFO 16:34:43,598 JOINING: waiting for ring information
 INFO 16:34:44,505 Handshaking version with /127.0.0.1
 INFO 16:34:44,533 Handshaking version with /0.0.0.0
 INFO 16:35:13,626 JOINING: schema complete, ready to bootstrap
 INFO 16:35:13,631 JOINING: getting bootstrap token
ERROR 16:35:13,633 Exception encountered during startup
java.lang.RuntimeException: No other nodes seen!  Unable to bootstrap.If you intended to start a single-node cluster, you should make sure your broadcast_address (or listen_address) is listed as a seed.  Otherwise, you need to determine why the seed being contacted has no knowledge of the rest of the cluster.  Usually, this can be solved by giving all nodes the same seed list.
	at org.apache.cassandra.dht.BootStrapper.getBootstrapSource(BootStrapper.java:154)
	at org.apache.cassandra.dht.BootStrapper.getBalancedToken(BootStrapper.java:135)
	at org.apache.cassandra.dht.BootStrapper.getBootstrapTokens(BootStrapper.java:115)
	at org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:666)
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:554)
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:451)
	at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:348)
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:447)
	at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:490)
java.lang.RuntimeException: No other nodes seen!  Unable to bootstrap.If you intended to start a single-node cluster, you should make sure your broadcast_address (or listen_address) is listed as a seed.  Otherwise, you need to determine why the seed being contacted has no knowledge of the rest of the cluster.  Usually, this can be solved by giving all nodes the same seed list.
	at org.apache.cassandra.dht.BootStrapper.getBootstrapSource(BootStrapper.java:154)
	at org.apache.cassandra.dht.BootStrapper.getBalancedToken(BootStrapper.java:135)
	at org.apache.cassandra.dht.BootStrapper.getBootstrapTokens(BootStrapper.java:115)
	at org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:666)
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:554)
	at org.apache.cassandra.service.StorageService.initServer(StorageService.java:451)
	at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:348)
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:447)
	at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:490)
Exception encountered during startup: No other nodes seen!  Unable to bootstrap.If you intended to start a single-node cluster, you should make sure your broadcast_address (or listen_address) is listed as a seed.  Otherwise, you need to determine why the seed being contacted has no knowledge of the rest of the cluster.  Usually, this can be solved by giving all nodes the same seed list.
ERROR 16:35:13,668 Exception in thread Thread[StorageServiceShutdownHook,5,main]
java.lang.NullPointerException
	at org.apache.cassandra.service.StorageService.stopRPCServer(StorageService.java:321)
	at org.apache.cassandra.service.StorageService.shutdownClientServers(StorageService.java:370)
	at org.apache.cassandra.service.StorageService.access$000(StorageService.java:88)
	at org.apache.cassandra.service.StorageService$1.runMayThrow(StorageService.java:519)
	at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
	at java.lang.Thread.run(Thread.java:724)