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https://issues.apache.org/jira/browse/HIVE-4305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13625421#comment-13625421
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Brock Noland commented on HIVE-4305:
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Hi Carl,
Absolutely. I don't want to push the hive community towards a tool they don't
like, however the community seems to be sitting on the fence.
1. Since many users/developers work on other projects in the ecosystem, there
is no learning curve for hive. For example, I use maven on Hadoop, Crunch,
MRUnit, and Flume among others. I have never used ivy and therefore I have
learn two tools to do the same thing. Given the widespread use of maven in the
Hadoop ecosystem, it's fair to say I am not the only person who has had to
learn ivy for Hive.
2. Since dependency resolution will be done by other projects on my machine,
using maven shares that cache. This is a non-trivial amount of build time.
3. Maven has an "offline" mode which can be enabled on the command line. Ivy
allows you to set ttl to "eternal" but this does not disable downloads
entirely. I believe there is an offline mode, but as I understand it requires
modification of the build configuration. Since I am no ivy expert, see #1, I
got this information from this page:
http://stackoverflow.com/questions/6971517/how-do-i-tell-ivy4r-to-stay-offline.
The big benefit from my perspective is #1. Cross pollination among projects is
easier if learning a new dependency resolution tool is not required. Therefore,
if all else is equal, maven is a good choice.
> Use a single system for dependency resolution
> ---------------------------------------------
>
> Key: HIVE-4305
> URL: https://issues.apache.org/jira/browse/HIVE-4305
> Project: Hive
> Issue Type: Improvement
> Components: Build Infrastructure, HCatalog
> Reporter: Travis Crawford
>
> Both Hive and HCatalog use ant as their build tool. However, Hive uses ivy
> for dependency resolution while HCatalog uses maven-ant-tasks. With the
> project merge we should converge on a single tool for dependency resolution.
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