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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-479) Change RCFileOutputFormat's generic signatute to be <WritableComparable, ..>
Date Tue, 12 May 2009 05:21:45 GMT
Change RCFileOutputFormat's generic signatute to be <WritableComparable, ..>

                 Key: HIVE-479
                 URL: https://issues.apache.org/jira/browse/HIVE-479
             Project: Hadoop Hive
          Issue Type: Improvement
            Reporter: He Yongqiang

In one test for hive-477, i found that the below command can not sucessfully pass:
$HADOOP_HOME/bin/hadoop jar $HADOOP_HOME/contrib/streaming/hadoop-0.19.0-streaming.jar -input
/user/hive/warehouse/tablerc1 -output testHiveWriter -inputformat org.apache.hadoop.hive.ql.io.RCFileInputFormat
-outputformat org.apache.hadoop.hive.ql.io.RCFileOutputFormat -mapper org.apache.hadoop.mapred.lib.IdentityMapper
-jobconf mapred.work.output.dir=. -jobconf hive.io.rcfile.column.number.conf=32 -jobconf mapred.output.compress=true
-numReduceTasks 0

It is caused by the assumption that RCFileOutputFormat thinks the key's class of passes in
records is Void.

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