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From "Rohini Palaniswamy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-9845) HCatSplit repeats information making input split data size huge
Date Tue, 03 Mar 2015 22:56:04 GMT
Rohini Palaniswamy created HIVE-9845:
----------------------------------------

             Summary: HCatSplit repeats information making input split data size huge
                 Key: HIVE-9845
                 URL: https://issues.apache.org/jira/browse/HIVE-9845
             Project: Hive
          Issue Type: Bug
          Components: HCatalog
            Reporter: Rohini Palaniswamy


Pig on Tez jobs with larger tables hit PIG-4443. Running on HDFS data which has even triple
the number of splits(100K+ splits and tasks) does not hit that issue.

{code}
HCatBaseInputFormat.java:
 //Call getSplit on the InputFormat, create an
      //HCatSplit for each underlying split
      //NumSplits is 0 for our purposes
      org.apache.hadoop.mapred.InputSplit[] baseSplits = 
        inputFormat.getSplits(jobConf, 0);

      for(org.apache.hadoop.mapred.InputSplit split : baseSplits) {
        splits.add(new HCatSplit(
            partitionInfo,
            split,allCols));
      }
{code}

Each hcatSplit duplicates partition schema and table schema.



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