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https://issues.apache.org/jira/browse/CASSANDRA-16364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17847464#comment-17847464
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Jeremiah Jordan commented on CASSANDRA-16364:
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The deterministic nature is a feature that I know of many people relying on for
the token allocation. It lets you setup duplicate clusters easily to restore
backups to among other things.
any change to that should be behind a flag, and the default should only change
in a new major.
> Joining nodes simultaneously with auto_bootstrap:false can cause token
> collision
> --------------------------------------------------------------------------------
>
> Key: CASSANDRA-16364
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16364
> Project: Cassandra
> Issue Type: Bug
> Components: Cluster/Membership
> Reporter: Paulo Motta
> Priority: Normal
> Fix For: 4.0.x, 4.1.x, 5.0.x, 5.x
>
>
> While raising a 6-node ccm cluster to test 4.0-beta4, 2 nodes chosen the same
> tokens using the default {{allocate_tokens_for_local_rf}}. However they both
> succeeded bootstrap with colliding tokens.
> We were familiar with this issue from CASSANDRA-13701 and CASSANDRA-16079,
> and the workaround to fix this is to avoid parallel bootstrap when using
> {{allocate_tokens_for_local_rf}}.
> However, since this is the default behavior, we should try to detect and
> prevent this situation when possible, since it can break users relying on
> parallel bootstrap behavior.
> I think we could prevent this as following:
> 1. announce intent to bootstrap via gossip (ie. add node on gossip without
> token information)
> 2. wait for gossip to settle for a longer period (ie. ring delay)
> 3. allocate tokens (if multiple bootstrap attempts are detected, tie break
> via node-id)
> 4. broadcast tokens and move on with bootstrap
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