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Posted to issues@tez.apache.org by "Cheolsoo Park (JIRA)" <ji...@apache.org> on 2014/07/31 00:16:38 UTC

[jira] [Created] (TEZ-1344) Combiner counters reported by Tez look wrong

Cheolsoo Park created TEZ-1344:
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             Summary: Combiner counters reported by Tez look wrong
                 Key: TEZ-1344
                 URL: https://issues.apache.org/jira/browse/TEZ-1344
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Cheolsoo Park
            Priority: Minor


Combiner input/output counters reported by a Tez job seems wrong
{code}
org.apache.hadoop.mapreduce.TaskCounter:
COMBINE_OUTPUT_RECORDS 35,977,263,353
COMBINE_INPUT_RECORDS 1,000,529,333
{code}
As can be seen, combiner output records > input records?!

The same counters from a MR job looks as follows-
{code}
Map-Reduce Framework:
Combine output records 1,000,316,600
Combine input records 35,977,049,632
{code}
Somehow input and output are swapped?



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