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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-641) Move all of the benchmarks and tests that depend on mapreduce to mapreduce
Date Thu, 24 Sep 2009 06:19:16 GMT

    [ 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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