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https://issues.apache.org/jira/browse/HADOOP-14284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15999486#comment-15999486
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Tsuyoshi Ozawa commented on HADOOP-14284:
-----------------------------------------

[~djp] It's another option. IMHO, it sounds more tough work than we expected - 
e.g. HDFS core including DataNode.java uses CacheBuilder. Could you share the 
examples that can be caused even with shading? The patch looks large, but it's 
just a change of importing and pom.xml.

[~busbey] thanks a lot! Your advice is correct. I used jarjar-maven-plugin to 
be before the package phase([I'm using process-classes to pass tests for 
now|https://github.com/oza/hadoop/blob/HADOOP-14284/hadoop-shaded-thirdparty/pom.xml#L84])
 because shade:shade is bound to the package phase. The v12 patch includes the 
change. PR for review on github is available 
[here|https://github.com/apache/hadoop/pull/210].

> Shade Guava everywhere
> ----------------------
>
>                 Key: HADOOP-14284
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14284
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 3.0.0-alpha3
>            Reporter: Andrew Wang
>            Assignee: Tsuyoshi Ozawa
>            Priority: Blocker
>         Attachments: HADOOP-14238.pre001.patch, HADOOP-14284.002.patch, 
> HADOOP-14284.004.patch, HADOOP-14284.007.patch, HADOOP-14284.010.patch, 
> HADOOP-14284.012.patch
>
>
> HADOOP-10101 upgraded the guava version for 3.x to 21.
> Guava is broadly used by Java projects that consume our artifacts. 
> Unfortunately, these projects also consume our private artifacts like 
> {{hadoop-hdfs}}. They also are unlikely on the new shaded client introduced 
> by HADOOP-11804, currently only available in 3.0.0-alpha2.
> We should shade Guava everywhere to proactively avoid breaking downstreams. 
> This isn't a requirement for all dependency upgrades, but it's necessary for 
> known-bad dependencies like Guava.



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