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https://issues.apache.org/jira/browse/CASSANDRA-15860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeremy Hanna updated CASSANDRA-15860:
-------------------------------------
Resolution: Not A Bug
Status: Resolved (was: Triage Needed)
As mentioned previously, it's simply not possible to change num_tokens after
data is written to a data center.
> Cannot change the number of tokens from 512 to 256 Fatal configuration error;
> unable to start server.
> -----------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15860
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15860
> Project: Cassandra
> Issue Type: Bug
> Reporter: Krishnakumar Jinka
> Priority: Normal
>
> Hello, I was following this issue from jira:
> https://issues.apache.org/jira/browse/CASSANDRA-11811?jql=text%20~%20%22CassandraDaemon.java%20Cannot%20change%22
> . We are using 3.11.2 and i see this error in the log while starting the
> cassandra, and it fails. I read the jira and understood that mutation
> happens, thereby doubling the number of tokens, and hence due to mismatch
> INFO [main] [2020-05-28 11:05:14] OutboundTcpConnection.java:108 -
> OutboundTcpConnection using coalescing strategy DISABLED
> INFO [HANDSHAKE-/192.168.5.53] [2020-05-28 11:05:14]
> OutboundTcpConnection.java:560 - Handshaking version with /192.168.5.53
> INFO [main] [2020-05-28 11:05:15] StorageService.java:707 - Loading persisted
> ring state
> INFO [main] [2020-05-28 11:05:15] StorageService.java:825 - Starting up
> server gossip
> INFO [main] [2020-05-28 11:05:15] TokenMetadata.java:479 - Updating topology
> for /192.168.5.52
> INFO [main] [2020-05-28 11:05:15] TokenMetadata.java:479 - Updating topology
> for /192.168.5.52
> Cannot change the number of tokens from 512 to 256
> Fatal configuration error; unable to start server. See log for stacktrace.
> ERROR [main] [2020-05-28 11:05:15] CassandraDaemon.java:708 - Fatal
> configuration error
> org.apache.cassandra.exceptions.ConfigurationException: Cannot change the
> number of tokens from 512 to 256
> at
> org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:989)
> ~[apache-cassandra-3.11.2.jar:3.11.2]
> at
> org.apache.cassandra.service.StorageService.initServer(StorageService.java:682)
> ~[apache-cassandra-3.11.2.jar:3.11.2]
> at
> org.apache.cassandra.service.StorageService.initServer(StorageService.java:613)
> ~[apache-cassandra-3.11.2.jar:3.11.2]
> at
> org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:379)
> [apache-cassandra-3.11.2.jar:3.11.2]
> at
> org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:602)
> [apache-cassandra-3.11.2.jar:3.11.2]
> at
> org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:691)
> [apache-cassandra-3.11.2.jar:3.11.2]
> INFO [StorageServiceShutdownHook] [2020-05-28 11:05:15] HintsService.java:220
> - Paused hints dispatch
> INFO [StorageServiceShutdownHook] [2020-05-28 11:05:15] Gossiper.java:1540 -
> Announcing shutdown
> INFO [StorageServiceShutdownHook] [2020-05-28 11:05:15]
> StorageService.java:2292 - Node /192.168.5.52 state jump to shutdown
> INFO [HANDSHAKE-/192.168.5.53] [2020-05-28 11:05:15]
> OutboundTcpConnection.java:560 - Handshaking version with /192.168.5.53
> I would like to know
> # what would be the root cause of this error
> # How to recover from this error. Because everytime i start the Cassandra,
> it is blocked due to this.
> /etc/cassandra/conf/cassandra.yaml
> contains num_tokens as 256 , auto_bootstrap is not provided, i guess by
> default it will be true.
> INFO [main] [2020-05-28 11:05:13] StorageService.java:618 - Cassandra
> version: 3.11.2
> INFO [main] [2020-05-28 11:05:13] StorageService.java:619 - Thrift API
> version: 20.1.0
> INFO [main] [2020-05-28 11:05:13] StorageService.java:620 - CQL supported
> versions: 3.4.4 (default: 3.4.4)
> INFO [main] [2020-05-28 11:05:13] StorageService.java:622 - Native protocol
> supported versions: 3/v3, 4/v4, 5/v5-beta (default: 4/v4)
>
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