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From "Robert Kanter (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4498) Remove hsqldb jar from Hadoop runtime classpath
Date Tue, 31 Jul 2012 20:24:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13426086#comment-13426086
] 

Robert Kanter commented on MAPREDUCE-4498:
------------------------------------------

The only documentation I could find is in the javadoc comments for the DBCountPageView and
the printout when you run the examples jar without specifying which example.  I'll update
the patch to add the instructions on how to run dbcount.
                
> Remove hsqldb jar from Hadoop runtime classpath
> -----------------------------------------------
>
>                 Key: MAPREDUCE-4498
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4498
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: build, examples
>    Affects Versions: 2.2.0-alpha
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>            Priority: Critical
>             Fix For: 2.2.0-alpha
>
>         Attachments: MAPREDUCE-4498-v2.patch, MAPREDUCE-4498.patch
>
>
> The hsqldb jar is included in hadoop for the DBCountPageView example only.  Currently
the example is using hsqldb version 2.x; however, 2.x is incompatible with 1.8.x -- having
this jar in the hadoop class path conflicts with dependent projects like Oozie, Hive, and
Pig which still use 1.8.x.  As there are no features hsqldb 2.x that are used by the example,
we should remove it from Hadoop's runtime classpath.

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