I have this problem (like here http://www.datastax.com/support-forums/topic/cassandra-does-not-startup) with duplicated cfIDs in the infromation schema, my whole cluster is currently down. I am trying to figure out where those cfIDs stored. I've manage to hack sstable2json not to throw same exception about duplicates but cannot find specific CFID which is duplicated. I am looking at schema_columnfamilies and schema_keyspaces and its not there...
Any ideas would be appreciated...