[jira] [Resolved] (CASSANDRA-8640) Paxos requires all nodes for CAS

["Aleksey Yeschenko (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-8640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Yeschenko resolved CASSANDRA-8640.
------------------------------------------
    Resolution: Fixed

> Paxos requires all nodes for CAS
> --------------------------------
>
>                 Key: CASSANDRA-8640
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8640
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Anthony Cozzie
>            Assignee: Anthony Cozzie
>             Fix For: 2.0.12, 2.1.3
>
>         Attachments: 0001-Fix-parentheses-bug-in-Paxos.patch, 0001-Fix-quorum-required-nodes-calculation-for-Paxos.patch
>
>
> In C* 2.1,
> {code}
> int requiredParticipants = participants + 1  / 2; // See CASSANDRA-833
> {code}
> Will always return participants because of operator precedence.  I am not sure just adding parentheses will fix the problem, though, as the original code differentiated between pending and natural endpoints.
> {code}
>  int requiredParticipants = pendingEndpoints.size() + 1 + naturalEndpoints.size() / 2; // See CASSANDRA-833
> {code}



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