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https://issues.apache.org/jira/browse/HADOOP-3665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12609493#action_12609493
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Hadoop QA commented on HADOOP-3665:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12385009/3665-0.patch
against trunk revision 672976.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed core unit tests.
-1 contrib tests. The patch failed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2775/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2775/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2775/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2775/console
This message is automatically generated.
> WritableComparator newKey() fails for NullWritable
> --------------------------------------------------
>
> Key: HADOOP-3665
> URL: https://issues.apache.org/jira/browse/HADOOP-3665
> Project: Hadoop Core
> Issue Type: Bug
> Components: io
> Affects Versions: 0.16.0
> Environment: n/a
> Reporter: Lukas Vlcek
> Priority: Minor
> Fix For: 0.19.0
>
> Attachments: 3665-0.patch, HADOOP-3665.path
>
>
> It is not possible to use NullWritable as a key in order to suppress key
> value in output.
> Syndrome exception:
> Caused by: java.lang.IllegalAccessException: Class
> org.apache.hadoop.io.WritableComparator can not access a member of class
> org.apache.hadoop.io.NullWritable with modifiers "private"
> The problem is that NullWritable is a singleton and does not provide public
> non-parametric constructor. The following code in WritableComparator causes
> the exception: return (WritableComparable)keyClass.newInstance();
> Proposed simple solution is to use ReflectionUtils instead (it requires
> modification as well).
> This issue is probably related to HADOOP-2922
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