Todd Lipcon commented on PIG-924:

Hey guys,

As we understood it, Pig 0.5 wasn't due for quite some time. If it's the case 
that 0.5 is a small release on top of 0.4 and it should be out in a few weeks, 
this seems a lot more reasonable.

Most likely we'll end up applying this patch to the 0.4 release for our 
distribution, even if there are multiple branches made in SVN. That's fine, 
though - we've got a process developed for this and are happy to support users 
on both versions for the next several months as people transition to 0.20 and 
the new APIs.

Feel free to resolve as wontfix

> 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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