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From "Tsuyoshi Ozawa (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14284) Shade Guava everywhere
Date Thu, 13 Apr 2017 16:28:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15967832#comment-15967832
] 

Tsuyoshi Ozawa commented on HADOOP-14284:
-----------------------------------------

Attaching v10 patch. Summary:

* (from v7) Creating hadoop-shaded-thirdparty which includes shaded Guava. However, it doesn't
include com.google.common.base.Function, Predicate, and TypeToken. It's because the classes
are required to use Apache Curator: https://cwiki.apache.org/confluence/display/CURATOR/TN13
* (from v7) Using Guava in hadoop-shaded-thirdparty(org.apache.hadoop.com.google.common) in
server-side code instead of non-shaded Guava directly. This change subsumes what HADOOP-14238
is addressing.
* (from v10) Shading Guava inside hadoop-client-modules to shade all Guava unlike hadoop-shaded-thirdparty.



> 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-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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