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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14284) Shade Guava everywhere
Date Fri, 14 Apr 2017 19:46:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15969451#comment-15969451
] 

Sean Busbey commented on HADOOP-14284:
--------------------------------------

This is a problem of build ordering. shading doesn't happen normally until the package phase.
But the update to the source means it's needed _before then_ at compile on the dependent modules.
Maven doesn't have a notion of this, aside from either a) manually rearranging when shading
happens (which will break some assumptions in maven) or b) being different projects rather
than just different modules.

HBase gets around this painfully; we're considering just moving to its own repo and release
cycle. maybe [~saint.ack@gmail.com] can explain it succinctly.

> 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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