[jira] [Resolved] (CASSANDRA-2389) Send writes to stable replicas when replicate-on-write is disabled during bootstrap

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-2389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis resolved CASSANDRA-2389.
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    Resolution: Won't Fix
    
> Send writes to stable replicas when replicate-on-write is disabled during bootstrap
> -----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-2389
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2389
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>            Priority: Minor
>         Attachments: 0001-During-bootstrap-only-perform-counter-writes-to-stable.txt, 0002-WIP-Add-a-counter-bootstrap-test.txt
>
>
> During bootstrap with replicate-on-write disabled, our previous approach of widening the replica set via TokenMetadata.getWriteEndpoints is not the correct approach. Instead, since a write is not immediately bound for all replicas, it needs to be sent to a replica that isn't joining or leaving the replica set due to bootstrap.
> Example: with rf=3, 4 nodes are active in a particular replica set: 1 is joining the set, 1 is leaving the set, and 2 are stable in the set (not affected by the bootstrap). The 2 stable nodes are the ones to which it is "safe" to send un-replicated writes during the bootstrap.
> Note that running without replicate-on-write enabled is _never_ recommended, but while the setting exists, we should do the right thing.

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