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From "Mck SembWever (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1774) ColumnFamilyOutputFormat only writes one column (per key)
Date Thu, 25 Nov 2010 07:36:14 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mck SembWever updated CASSANDRA-1774:
-------------------------------------

    Attachment: CASSANDRA-1774.patch

> ColumnFamilyOutputFormat only writes one column (per key)
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-1774
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1774
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 0.7 beta 1
>            Reporter: Mck SembWever
>             Fix For: 0.7.0
>
>         Attachments: CASSANDRA-1774.patch
>
>
> From mailing list http://thread.gmane.org/gmane.comp.db.cassandra.user/10385
> ColumnFamilyOutputFormat will only write out one column
> per key.
> Alex Burkoff also reported this nearly two months ago, but nobody ever
> replied...
>  http://article.gmane.org/gmane.comp.db.cassandra.user/9325
> has anyone any ideas? 
> should it be possible to write multiple columns out?
> This is very easy to reproduce. Use the contrib/wordcount example, with
> OUTPUT_REDUCER=cassandra and in WordCount.java add at line 132
> >              results.add(getMutation(key, sum));
> > +            results.add(getMutation(new Text("doubled"), sum*2));
> Only the last mutation for any key seems to be written.

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