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https://issues.apache.org/jira/browse/MAPREDUCE-4782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493571#comment-13493571
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Hadoop QA commented on MAPREDUCE-4782:
--------------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12552709/MR-4782.txt
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-core
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient:
org.apache.hadoop.mapred.TestClusterMRNotification
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3000//testReport/
Console output:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3000//console
This message is automatically generated.
> NLineInputFormat skips first line of last InputSplit
> ----------------------------------------------------
>
> Key: MAPREDUCE-4782
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4782
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: client
> Affects Versions: 0.22.0, 0.23.0, 1.0.0, 2.0.0-alpha, trunk
> Environment: job.setMapperClass(Mapper.class); // just pass text
> lines through to output
> job.setInputFormatClass(NLineInputFormat.class);
> NLineInputFormat.setNumLinesPerSplit(job, 100);
> NLineInputFormat.setInputPaths(job, "/path/to/a_file_with_many_lines.txt");
> Reporter: Mark Fuhs
> Priority: Critical
> Attachments: MAPREDUCE-4782.patch, MR-4782.txt
>
>
> NLineInputFormat creates FileSplits that are then used by LineRecordReader to
> generate Text values. To deal with an idiosyncrasy of LineRecordReader, the
> begin and length fields of the FileSplit are constructed differently for the
> first FileSplit vs. the rest.
> After looping through all lines of a file, the final FileSplit is created,
> but the creation does not respect the difference of how the first vs. the
> rest of the FileSplits are created.
> This results in the first line of the final InputSplit being skipped. I've
> created a patch to NLineInputFormat, and this fixes the problem.
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