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https://issues.apache.org/jira/browse/SPARK-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14077078#comment-14077078
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Marcelo Vanzin commented on SPARK-2420:
---------------------------------------

Just an update from our offline conversation: even if it's a little more work 
on the Spark side, I'm fine with shading, given that it would allow users to 
use newer versions of Guava without having to worry (too much) about 
compatibility.

> 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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