[jira] [Resolved] (CASSANDRA-5679) Wide Row calls map method once per column in Hadoop MapReduce
[ https://issues.apache.org/jira/browse/CASSANDRA-5679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Jonathan Ellis resolved CASSANDRA-5679. --- Resolution: Won't Fix Very well, resolved as wontfix instead of duplicate. > 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
[jira] [Resolved] (CASSANDRA-5679) Wide Row calls map method once per column in Hadoop MapReduce
[ https://issues.apache.org/jira/browse/CASSANDRA-5679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Jonathan Ellis resolved CASSANDRA-5679. --- Resolution: Duplicate > 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 > > 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