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https://issues.apache.org/jira/browse/SPARK-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14072334#comment-14072334
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Sean Owen commented on SPARK-2420:
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Marcelo pointed out offline that Guava 17 is *not* necessarily 
backwards-compatible with 11. It omits the LimitInputStream class for example. 
This doesn't directly affect the issue, but points out that users may not be 
able to bring their own later Guava, even if they package it correctly and 
aren't depending on Spark's version. It's a tricky issue and will end up being 
a question of tradeoffs.

> Change Spark build to minimize library conflicts
> ------------------------------------------------
>
>                 Key: SPARK-2420
>                 URL: https://issues.apache.org/jira/browse/SPARK-2420
>             Project: Spark
>          Issue Type: Wish
>          Components: Build
>    Affects Versions: 1.0.0
>            Reporter: Xuefu Zhang
>         Attachments: spark_1.0.0.patch
>
>
> During the prototyping of HIVE-7292, many library conflicts showed up because 
> Spark build contains versions of libraries that's vastly different from 
> current major Hadoop version. It would be nice if we can choose versions 
> that's in line with Hadoop or shading them in the assembly. Here are the wish 
> list:
> 1. Upgrade protobuf version to 2.5.0 from current 2.4.1
> 2. Shading Spark's jetty and servlet dependency in the assembly.
> 3. guava version difference. Spark is using a higher version. I'm not sure 
> what's the best solution for this.
> The list may grow as HIVE-7292 proceeds.
> For information only, the attached is a patch that we applied on Spark in 
> order to make Spark work with Hive. It gives an idea of the scope of changes.



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