Cassandra Hector - All Host Pools Marked Down

2011-02-22 18:59:09,894 [main] ERROR (CassandraService.java:2023) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,894 [main] ERROR (CassandraService.java:2023) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,895 [main] ERROR (CassandraService.java:2023) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,895 [main] ERROR (CassandraService.java:2023) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,895 [main] ERROR (CassandraService.java:2023) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,895 [main] ERROR (CassandraService.java:2023) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,895 [main] ERROR (CassandraService.java:2099) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,895 [main] ERROR (CassandraService.java:2099) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,896 [main] ERROR (CassandraService.java:582) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,896 [main] ERROR (CassandraService.java:582) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,896 [main] ERROR (CassandraService.java:2099) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.
2011-02-22 18:59:09,896 [main] ERROR (CassandraService.java:2099) -
me.prettyprint.hector.api.exceptions.HectorException: All host pools
marked down. Retry burden pushed out to client.

This means no connections to the cluster were established. Can you
verify connectability from the third host to the cluster? Might there
be a firewall adjustment or similar required?