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https://issues.apache.org/jira/browse/HADOOP-9991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13824863#comment-13824863
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Vinay commented on HADOOP-9991:
-------------------------------
Thanks Steve for initiating this major task.
Adding to above points, there are many duplicate jars in the distribution.
such as,
hdfs/lib, mapreduce/lib, tools/lib and yarn/lib contains ~90% of the same jars
present in common/lib.
Is there any specific reason to keep these multiple copies of the jars.?
> Fix up Hadoop Poms for enforced dependencies, roll up JARs to latest versions
> -----------------------------------------------------------------------------
>
> Key: HADOOP-9991
> URL: https://issues.apache.org/jira/browse/HADOOP-9991
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build
> Affects Versions: 2.3.0, 2.1.1-beta
> Reporter: Steve Loughran
> Attachments: hadoop-9991-v1.txt
>
>
> If you try using Hadoop downstream with a classpath shared with HBase and
> Accumulo, you soon discover how messy the dependencies are.
> Hadoop's side of this problem is
> # not being up to date with some of the external releases of common JARs
> # not locking down/excluding inconsistent versions of artifacts provided down
> the dependency graph
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