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From "Harish Doddi (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3880) Random Partitioner does not check if tokens are outside of its range
Date Wed, 07 Mar 2012 19:32:57 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13224631#comment-13224631
] 

Harish Doddi commented on CASSANDRA-3880:
-----------------------------------------

Hi,

I have seen from the code the RP's token range as of now is from 0 to 2^127

There are checks in the code if you bring a node with a token > 2^127, you run into a configuration
exception. As a result that node cannot be bootstrapped. I validated this by supplying a token
> 2^127

If you think there is something I am missing, please let me know. 
                
> Random Partitioner does not check if tokens are outside of its range
> --------------------------------------------------------------------
>
>                 Key: CASSANDRA-3880
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3880
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.7.6, 1.0.7
>            Reporter: Marcel Steinbach
>            Assignee: Harish Doddi
>            Priority: Minor
>
> Setting up a ring where the tokens are outside RP's token range leads to an unbalanced
cluster. The partitioner still reports equally distributed ownership since it calculates ownership
only with the _distances_ of the tokens in relation to the maximum token. 
> E.g. maximum token = 15
> token1 = 5
> token2 = 10
> token3 = 15
> token4 = 20
> ownership4 = (token4 - token3) / maximum_token = 5 / 15 = 1/3
> So token4 claims to own 33.33% of the ring but is not responsible for any primary replicas.

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