[jira] Commented: (HADOOP-1971) Constructing a JobConf without a class leads to a very misleading error message.

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

    [ https://issues.apache.org/jira/browse/HADOOP-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12532132 ] 

Hadoop QA commented on HADOOP-1971:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12366997/notSetJarError_v1.patch
against trunk revision r581492.

    @author +1.  The patch does not contain any @author tags.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new compiler warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

    contrib tests -1.  The patch failed contrib unit tests.

Test results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/874/testReport/
Findbugs warnings: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/874/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/874/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/874/console

This message is automatically generated.

> Constructing a JobConf without a class leads to a very misleading error message.
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-1971
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1971
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.14.2
>         Environment: Centos, java 1.5
>            Reporter: Ted Dunning
>            Assignee: Enis Soztutar
>            Priority: Minor
>             Fix For: 0.14.2
>
>         Attachments: notSetJarError_v1.patch
>
>
> If this line from a typical map/reduce program
>         JobConf conf = new JobConf(Flatten.class);
> has the argument deleted then I get a message that the input format that I specify cannot be found.  That message leads a naive user on a rat chase.  I only corrected this by bisecting against a working program.

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