map join silently fails when the heap is exhausted if the chosen table for map 
join compressed
----------------------------------------------------------------------------------------------

                 Key: HIVE-2601
                 URL: https://issues.apache.org/jira/browse/HIVE-2601
             Project: Hive
          Issue Type: Bug
          Components: CLI
    Affects Versions: 0.7.1
            Reporter: Esteban Gutierrez


If table used for Map Join is not compressed:
{code}
2011-11-22 12:50:03     Starting to launch local task to process map join;      
maximum memory = 49610752
Exception in thread "Thread-1" java.lang.OutOfMemoryError: GC overhead limit 
exceeded
        at org.apache.hadoop.util.RunJar$1.run(RunJar.java:156)
11/11/22 00:50:28 ERROR exec.MapredLocalTask: Execution failed with exit 
status: 2
{code}

If table used for Map Join is compressed:
{code}
2011-11-22 12:56:24     Starting to launch local task to process map join;      
maximum memory = 48562176
11/11/22 00:57:08 ERROR exec.MapredLocalTask: Execution failed with exit 
status: 2
FAILED: Execution Error, return code 2 from 
org.apache.hadoop.hive.ql.exec.MapredLocalTask
11/11/22 00:57:08 ERROR ql.Driver: FAILED: Execution Error, return code 2 from 
org.apache.hadoop.hive.ql.exec.MapredLocalTask
{code}


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