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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1722) Make streaming to handle non-utf8 byte array
Date Wed, 04 Feb 2009 23:55:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12670560#action_12670560
] 

Hadoop QA commented on HADOOP-1722:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12399457/HADOOP-1722-v4.patch
  against trunk revision 740532.

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

    +1 tests included.  The patch appears to include 25 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 Eclipse classpath. The patch retains Eclipse classpath integrity.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

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

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

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3798/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3798/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3798/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3798/console

This message is automatically generated.

> Make streaming to handle non-utf8 byte array
> --------------------------------------------
>
>                 Key: HADOOP-1722
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1722
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: Runping Qi
>            Assignee: Klaas Bosteels
>         Attachments: HADOOP-1722-v2.patch, HADOOP-1722-v3.patch, HADOOP-1722-v4.patch,
HADOOP-1722-v4.patch, HADOOP-1722.patch
>
>
> Right now, the streaming framework expects the output sof the steam process (mapper or
reducer) are line 
> oriented UTF-8 text. This limit makes it impossible to use those programs whose outputs
may be non-UTF-8
>  (international encoding, or maybe even binary data). Streaming can overcome this limit
by introducing a simple
> encoding protocol. For example, it can allow the mapper/reducer to hexencode its keys/values,

> the framework decodes them in the Java side.
> This way, as long as the mapper/reducer executables follow this encoding protocol, 
> they can output arabitary bytearray and the streaming framework can handle them.

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