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From Christopher Bottaro <>
Subject Bulk loader: Got an unknow host from describe_ring
Date Thu, 01 Sep 2011 21:27:31 GMT

I'm trying to import data from one Cassandra cluster to another.  The old
cluster is using ports 7000 and 9160 and the new cluster is using 7001 and
9161.  I ran "nodetool -h localhost snapshot" on a node on the old cluster.
 I then downloaded apache-cassandra-0.8.4-bin.tar.gz, edited
conf/cassandra.yaml appropriately for the new cluster, exported
CASSANDRA_INCLUDE=bin/ (so it doesn't try to use the
installed, running Cassandra).

When I run sstableloader, I can see that it's connecting to the new cluster
(by tailing the logs), but after a few seconds, it gives the error: "Got an
unknow host from describe_ring"

After banging my head for a while, I scp'ed the snapshotted data to a node
on the *new* cluster.  I again downloaded apache-cassandra-0.8.4-bin.tar.gz
and configured cassandra.yaml there appropriately (with listen_address: so as to not conflict with the Cassandra already running on the

Running sstableloader resulted in the same error.

"nodetool -h localhost ring" shows a healthy cluster.  Running that command
works both locally and remotely.  I can connect to the cluster using
cassandra-cli both locally and remotely as well.

Any ideas?  Thanks for the help.

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