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https://issues.apache.org/jira/browse/CASSANDRA-17164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17482510#comment-17482510
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Benedict Elliott Smith commented on CASSANDRA-17164:
----------------------------------------------------

I think this would be fine, I need to think through why I did not do this 
originally, as I did consider it. It may simply have been to minimise the 
change in semantics to {{system.paxos}}, without there having been any 
particularly good reason. Perhaps also for debugging purposes, it helps to be 
able to see whether something had been promised before it was 
accepted/committed.

I think there is perhaps also some additional complexity when a replica has 
promised a ballot with the same timestamp, and then proceed to accept it. I 
don't think we would resolve these reliably, so we might not actually overwrite 
it anyway, and I don't think there is a trivial solution to this problem in the 
storage layer.

> CEP-14: Paxos Improvements
> --------------------------
>
>                 Key: CASSANDRA-17164
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17164
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Consistency/Coordination, Consistency/Repair
>            Reporter: Benedict Elliott Smith
>            Assignee: Benedict Elliott Smith
>            Priority: Normal
>             Fix For: 4.1
>
>
> This ticket encompasses work for [CEP-14|
> https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-14%3A+Paxos+Improvements].



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