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Date: Wed, 23 Sep 2009 23:19:16 -0700 (PDT)
From: "Owen O'Malley (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-641) Move all of the benchmarks and tests
 that depend on mapreduce to mapreduce
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    [ https://issues.apache.org/jira/browse/HDFS-641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759036#action_12759036 ] 

Owen O'Malley commented on HDFS-641:
------------------------------------

That had been the plan, but in practice, it didn't work well. To build, you needed to compile common, and update the common jars in hdfs and mapred. Then you compile hdfs and push the jar to mapreduce. Then you compile mapreduce and push to hdfs. Then you compile hdfs-test and push to mapreduce. Then you compile mapreduce test and push it to hdfs. Then you run the hdfs tests. Then you run the mapreduce tests. 

By comparison, if we break the cycle, we can compile common, test common, compile hdfs, test hdfs, compile mapreduce, and test mapreduce. Yes, we need to do more work to test hdfs without mapreduce. But this is a good change.

> Move all of the benchmarks and tests that depend on mapreduce to mapreduce
> --------------------------------------------------------------------------
>
>                 Key: HDFS-641
>                 URL: https://issues.apache.org/jira/browse/HDFS-641
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.20.2
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>            Priority: Blocker
>             Fix For: 0.21.0
>
>
> Currently, we have a bad cycle where to build hdfs you need to test mapreduce and iterate once. This is broken.

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