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From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CRUNCH-235) Avoid exposing incompatible Hadoop classes in Crunch API
Date Sun, 07 Jul 2013 19:41:48 GMT

    [ https://issues.apache.org/jira/browse/CRUNCH-235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13701646#comment-13701646
] 

Josh Wills commented on CRUNCH-235:
-----------------------------------

+1

LGTM-- thanks!

                
> Avoid exposing incompatible Hadoop classes in Crunch API
> --------------------------------------------------------
>
>                 Key: CRUNCH-235
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-235
>             Project: Crunch
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: CRUNCH-235.patch
>
>
> Between Hadoop 1 and 2, org.apache.hadoop.mapreduce.Counter changed from a class to an
interface. Therefore, exposing Counter in Crunch's API means that Crunch programs may need
to be recompiled when moving from a Hadoop 1 to a Hadoop 2 cluster. It would be nice to avoid
the need to recompile. 
> Note that Crunch itself has two artifacts - one for each major version of Hadoop - and
the change proposed here would not alter that, it would just mean that the same Crunch program
binary could be used with either Crunch artifact.

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