[jira] [Commented] (MAPREDUCE-6038) A boolean may be set error in the Word Count v2.0 in MapReduce Tutorial

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14524881#comment-14524881 ] 

Hadoop QA commented on MAPREDUCE-6038:
--------------------------------------

\\
\\
| (x) *{color:red}-1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | patch |   0m  0s | The patch command could not apply the patch during dryrun. |
\\
\\
|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12665076/MAPREDUCE-6038.1.patch |
| Optional Tests | site |
| git revision | trunk / f1a152c |
| Console output | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5561/console |


This message was automatically generated.

> A boolean may be set error in the Word Count v2.0 in MapReduce Tutorial
> -----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6038
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6038
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>         Environment: java version 1.8.0_11 hostspot 64-bit
>            Reporter: Pei Ma
>            Assignee: Tsuyoshi Ozawa
>            Priority: Minor
>         Attachments: MAPREDUCE-6038.1.patch
>
>
> As a beginner, when I learned about the basic of the mr, I found that I cound't run the WordCount2 using the command "bin/hadoop jar wc.jar WordCount2 /user/joe/wordcount/input /user/joe/wordcount/output" in the Tutorial. The VM throwed the NullPoniterException at the line 47. In the line 45, the returned default value of "conf.getBoolean" is true. That is to say  when "wordcount.skip.patterns" is not set ,the WordCount2 will continue to execute getCacheFiles.. Then patternsURIs gets the null value. When the "-skip" option dosen't exist,  "wordcount.skip.patterns" will not be set. Then a NullPointerException come out.
> At all, the block after the if-statement in line no. 45 shoudn't be executed when the "-skip" option dosen't exist in command. Maybe the line 45 should like that  "if (conf.getBoolean("wordcount.skip.patterns", false)) { "
> .Just change the boolean.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)