Solved: Adding new cassandra nodes results in failure - Page 2

aruljothi · 08-14-2018 03:36 AM

Trying to add 3 new cassandra nodes to a datacenter which already has 3 cassandra nodes

CASS_HOSTS="$IP1:1,1 $IP2:1,1 $IP3:1,1 $IP4:1,2 $IP5:1,2 $IP6:1,2"

I am adding "$IP4:1,2 $IP5:1,2 $IP6:1,2" nodes

I found that $IP4L1,2 is added and setup properly, where as "$IP5:1,2 $IP6:1,2" has following error.

ERROR 12:51:40 Fatal configuration error
org.apache.cassandra.exceptions.ConfigurationException: Bootstrapping to existing token 0 is not allowed (decommission/removenode the old node first).
at org.apache.cassandra.dht.BootStrapper.getBootstrapTokens(BootStrapper.java:108) ~[apache-cassandra-2.1.16.jar:2.1.16]
at org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:895) ~[apache-cassandra-2.1.16.jar:2.1.16]
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:740) ~[apache-cassandra-2.1.16.jar:2.1.16]
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:617) ~[apache-cassandra-2.1.16.jar:2.1.16]
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:391) [apache-cassandra-2.1.16.jar:2.1.16]
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:566) [apache-cassandra-2.1.16.jar:2.1.16]
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:655) [apache-cassandra-2.1.16.jar:2.1.16]
Bootstrapping to existing token 0 is not allowed (decommission/removenode the old node first).
Fatal configuration error; unable to start server. See log for stacktrace.

aruljothi

This is due to the way CASS_HOSTS config is updated.

It is clearly mentioned in https://docs.apigee.com/private-cloud/v4.18.01/adding-cassandra-nodes that "Important: Add each new Cassandra node to CASS_HOSTS after an existing node."

As per above statement, only $IP4L1,2 is added after an existing node $IP3:1,1 where as $IP5:1,2 $IP6:1,2 is not after existing node and hence the failure. please change the CASS_HOSTS config as shown below to resolve the issue.

CASS_HOSTS="$IP1:1,1 $IP4:1,2 $IP2:1,1 $IP5:1,2 $IP3:1,1 $IP6:1,2"

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