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From Anubhav Kale <Anubhav.K...@microsoft.com.INVALID>
Subject Cassandra 2.1.13: Using JOIN_RING=False
Date Tue, 09 May 2017 21:01:58 GMT
Hello,

With some inspiration from the Cassandra Summit talk from last year, we are trying to setup
a cluster with coordinator-only nodes. We setup join_ring=false in env.sh, disabled auth in
YAML and the nodes are able to start just fine. However, we're running into a few problems

1] The nodes marked with join_ring=false continue to store data. Why ?
2] We tried Python driver's whitelistedpolicy. But we notice message like below, so we are
not able to send queries to all nodes marked as coordinators. We also changed the Scala driver
to support whitelisting, but see the same thing. What are we missing ?
3] Is there any way to concretely tell that only coordinator nodes are getting requests from
clients ? We don't have OpsCenter.

Thanks !

2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: [control connection] Removing host not
found in peers metadata: <Host: 10.80.10.128>
2017-05-09 20:45:25,060 [INFO] cassandra.cluster: Cassandra host 10.80.10.128 removed
2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: Removing host 10.80.10.128
2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: [control connection] Removing host not
found in peers metadata: <Host: 10.80.10.127>
2017-05-09 20:45:25,060 [INFO] cassandra.cluster: Cassandra host 10.80.10.127 removed
2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: Removing host 10.80.10.127
2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: [control connection] Removing host not
found in peers metadata: <Host: 10.80.10.129>
2017-05-09 20:45:25,060 [INFO] cassandra.cluster: Cassandra host 10.80.10.129 removed
2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: Removing host 10.80.10.129
2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: [control connection] Finished fetching
ring info
2017-05-09 20:45:25,060 [DEBUG] cassandra.cluster: [control connection] Rebuilding token map
due to topology changes
2017-05-09 20:45:25,081 [DEBUG] cassandra.metadata: user functions table not found
2017-05-09 20:45:25,081 [DEBUG] cassandra.metadata: user aggregates table not found
2017-05-09 20:45:25,098 [DEBUG] cassandra.cluster: Control connection created
2017-05-09 20:45:25,099 [DEBUG] cassandra.pool: Initializing connection for host 10.80.10.125
2017-05-09 20:45:25,099 [DEBUG] cassandra.pool: Initializing connection for host 10.80.10.126


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