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https://issues.apache.org/jira/browse/MAHOUT-1354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13836953#comment-13836953
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Gokhan Capan commented on MAHOUT-1354:
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Well, I tried something and want to share.
Based on:
In hadoop-2-stable, compatibility with hadoop-1 is preferred over with
hadoop-2-alpha
(http://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduce_Compatibility_Hadoop1_Hadoop2.html).
For example, return type for ProgramDriver#driver(String) was void in hadoop-1
(which we use in MahoutDriver), int in hadoop-2-alpha, void again in
hadoop-2-stable. It seems if we select the right artifacts, there is nothing to
worry about the compatibility.
My conclusion was:
The current hadoop-0.20 and hadoop-0.23 profiles can be utilized: we can rename
them to hadoop-1 and hadoop-2, respectively, then make hadoop-2 (stable) the
default profile, then set the hadoop.version property to 2.2.0. We need to
worry about some third party dependencies though, for instance, hbase-client in
mahout-integration is dependent to hadoop-1 (for that particular artifact,
simply excluding hadoop-core did not break any tests, by the way).
> Mahout Support for Hadoop 2
> ----------------------------
>
> Key: MAHOUT-1354
> URL: https://issues.apache.org/jira/browse/MAHOUT-1354
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.8
> Reporter: Suneel Marthi
> Assignee: Suneel Marthi
> Fix For: 1.0
>
>
> Mahout support for Hadoop , now that Hadoop 2 is official.
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