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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-924) Make Pig work with multiple versions of Hadoop
Date Thu, 20 Aug 2009 17:24:14 GMT

     [ https://issues.apache.org/jira/browse/PIG-924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley updated PIG-924:
------------------------------

    Status: Open  (was: Patch Available)

-1

I think this is a bad idea and is totally unmaintainable. In particular, the HadoopShim interface
is very specific to the changes in those particular versions. We are trying to stabilize the
FileSystem and Map/Reduce interfaces to avoid these problems and that is a much better solution.

> Make Pig work with multiple versions of Hadoop
> ----------------------------------------------
>
>                 Key: PIG-924
>                 URL: https://issues.apache.org/jira/browse/PIG-924
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Dmitriy V. Ryaboy
>         Attachments: pig_924.2.patch, pig_924.3.patch, pig_924.patch
>
>
> The current Pig build scripts package hadoop and other dependencies into the pig.jar
file.
> This means that if users upgrade Hadoop, they also need to upgrade Pig.
> Pig has relatively few dependencies on Hadoop interfaces that changed between 18, 19,
and 20.  It is possibly to write a dynamic shim that allows Pig to use the correct calls for
any of the above versions of Hadoop. Unfortunately, the building process precludes us from
the ability to do this at runtime, and forces an unnecessary Pig rebuild even if dynamic shims
are created.

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