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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4694) Inconsistency in reduce input record counters between the stable and evolving APIs
Date Mon, 01 Oct 2012 15:33:07 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13466877#comment-13466877
] 

Hadoop QA commented on MAPREDUCE-4694:
--------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12547217/MAPREDUCE-4694.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient:

                  org.apache.hadoop.mapred.TestFieldSelection
                  org.apache.hadoop.mapreduce.TestMROutputFormat
                  org.apache.hadoop.mapreduce.lib.chain.TestChainErrors
                  org.apache.hadoop.mapreduce.lib.aggregate.TestMapReduceAggregates
                  org.apache.hadoop.mapreduce.TestValueIterReset
                  org.apache.hadoop.mapreduce.lib.output.TestMRMultipleOutputs
                  org.apache.hadoop.mapred.TestMapRed
                  org.apache.hadoop.mapred.lib.TestMultipleOutputs
                  org.apache.hadoop.mapred.TestReporter
                  org.apache.hadoop.mapred.TestCollect
                  org.apache.hadoop.mapred.TestTaskCommit
                  org.apache.hadoop.mapreduce.TestMapReduce
                  org.apache.hadoop.mapred.TestJobCounters
                  org.apache.hadoop.mapreduce.TestCrossAPICounters
                  org.apache.hadoop.mapreduce.lib.db.TestDataDrivenDBInputFormat
                  org.apache.hadoop.mapreduce.lib.input.TestMultipleInputs
                  org.apache.hadoop.mapred.TestLocalMRNotification
                  org.apache.hadoop.fs.TestDFSIO
                  org.apache.hadoop.mapred.TestSpecialCharactersInOutputPath
                  org.apache.hadoop.mapred.lib.TestMultithreadedMapRunner
                  org.apache.hadoop.mapreduce.lib.chain.TestSingleElementChain
                  org.apache.hadoop.fs.slive.TestSlive
                  org.apache.hadoop.mapred.TestLineRecordReader
                  org.apache.hadoop.mapred.TestUserDefinedCounters
                  org.apache.hadoop.mapred.TestMapOutputType
                  org.apache.hadoop.mapred.lib.aggregate.TestAggregates
                  org.apache.hadoop.conf.TestNoDefaultsJobConf
                  org.apache.hadoop.mapreduce.lib.input.TestLineRecordReader
                  org.apache.hadoop.fs.TestFileSystem
                  org.apache.hadoop.mapred.lib.TestChainMapReduce
                  org.apache.hadoop.mapred.join.TestDatamerge
                  org.apache.hadoop.mapred.jobcontrol.TestLocalJobControl
                  org.apache.hadoop.mapred.TestJavaSerialization
                  org.apache.hadoop.mapred.lib.TestKeyFieldBasedComparator
                  org.apache.hadoop.mapreduce.lib.join.TestJoinDatamerge
                  org.apache.hadoop.mapreduce.TestLocalRunner
                  org.apache.hadoop.mapreduce.lib.fieldsel.TestMRFieldSelection
                  org.apache.hadoop.mapred.TestComparators
                  org.apache.hadoop.mapreduce.lib.partition.TestMRKeyFieldBasedComparator
                  org.apache.hadoop.mapreduce.TestMapCollection
                  org.apache.hadoop.mapreduce.lib.map.TestMultithreadedMapper
                  org.apache.hadoop.mapred.TestFileOutputFormat
                  org.apache.hadoop.mapreduce.lib.chain.TestMapReduceChain

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2894//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2894//console

This message is automatically generated.
                
> Inconsistency in reduce input record counters between the stable and evolving APIs
> ----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4694
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4694
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.0.0-alpha
>            Reporter: Harsh J
>            Assignee: Harsh J
>         Attachments: MAPREDUCE-4694.patch
>
>
> In the stable (mapred) API execution, if the values iterator is skipped by a user, the
records underneath it aren't counted in the "Reduce input records" counter as the key progresses
to the next unique one. In the evolving API (mapreduce) API execution, if the values iterator
is skipped by a user, the records underneath it is still counted as the key progresses to
the next unique one.
> This behavior comes to me as a faulty one in the old API. A "Reduce input records" counter
must always define all the records that have been passed into a reducer (cause they are read
regardless of skipping), and both API's record counting despite user applications must be
consistent.
> I'll post a test case illustrating this shortly.

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