[
https://issues.apache.org/jira/browse/CASSANDRA-5679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tony Zhao updated CASSANDRA-5679:
---------------------------------
Labels: cassandra hadoop (was: )
> Wide Row calls map method once per column in Hadoop MapReduce
> -------------------------------------------------------------
>
> Key: CASSANDRA-5679
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5679
> Project: Cassandra
> Issue Type: Bug
> Components: Hadoop
> Affects Versions: 1.2.4
> Environment: CentOS 6.3, Hadoop 1.1.2, Cassandra 1.2.4
> Reporter: Tony Zhao
> Labels: cassandra, hadoop
>
> When using Cassandra without wide row support in a Hadoop job, the map method
> gets a number of columns limited by the SlicePredicate every time the map
> method in the mapper is called; but when using wide row support, the map
> method is called once for every column. It seems like the limit in
> SlicePredicate is ignored when wide row set to true.
> This prevents in-map reducing code to work (i.e. emit top ten from a mapper).
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
