Low Description
This isn't reproducible for me, but it happened to one of the servers in our cluster while starting up. It went away on a restart, but I figured it was worth filing anyway:
ERROR [main] 2013-09-26 08:04:02,478 CassandraDaemon.java (line 464) Exception encountered during startup
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
at java.util.HashMap$EntryIterator.next(HashMap.java:834)
at java.util.HashMap$EntryIterator.next(HashMap.java:832)
at com.google.common.collect.AbstractBiMap$EntrySet$1.next(AbstractBiMap.java:294)
at com.google.common.collect.AbstractBiMap$EntrySet$1.next(AbstractBiMap.java:286)
at com.google.common.collect.AbstractBiMap.putAll(AbstractBiMap.java:160)
at com.google.common.collect.HashBiMap.putAll(HashBiMap.java:42)
at com.google.common.collect.HashBiMap.create(HashBiMap.java:72)
at org.apache.cassandra.locator.TokenMetadata.cloneOnlyTokenMap(TokenMetadata.java:561)
at org.apache.cassandra.locator.AbstractReplicationStrategy.getAddressRanges(AbstractReplicationStrategy.java:192)
at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:1711)
at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:1692)
at org.apache.cassandra.service.StorageService.handleStateNormal(StorageService.java:1461)
at org.apache.cassandra.service.StorageService.onChange(StorageService.java:1228)
at org.apache.cassandra.gms.Gossiper.doNotifications(Gossiper.java:949)
at org.apache.cassandra.gms.Gossiper.addLocalApplicationState(Gossiper.java:1116)
at org.apache.cassandra.service.StorageService.setTokens(StorageService.java:214)
at org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:802)
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:554)
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:451)