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From "Anthony Cozzie (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8640) Paxos requires all nodes for CAS
Date Sat, 17 Jan 2015 00:34:34 GMT

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

Anthony Cozzie updated CASSANDRA-8640:
--------------------------------------
    Attachment: 0001-Fix-parentheses-bug-in-Paxos.patch

> 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
>
>         Attachments: 0001-Fix-parentheses-bug-in-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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