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https://issues.apache.org/jira/browse/HADOOP-6800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882842#action_12882842
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Tom White commented on HADOOP-6800:
-----------------------------------
Hemanth, Thanks for running through this. Did you run ant with "mvn-install
-Dresolvers=internal" options? When I do a clean build I don't get any of the
duplicates you mention.
> Harmonize JAR library versions
> ------------------------------
>
> Key: HADOOP-6800
> URL: https://issues.apache.org/jira/browse/HADOOP-6800
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Tom White
> Assignee: Tom White
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: HADOOP-6800.patch, HADOOP-6800.patch, HADOOP-6800.patch,
> ivy-declarations.dump.merged, jars-in-lib.dump.merged
>
>
> Currently, multiple versions of the same library JAR are being pulled in for
> various reasons.
> * Within the same project, multiple versions of the same JAR are pulled in.
> E.g. Avro (used by Common) depends on Commons Lang 2.5 while Common depends
> on Commons Lang 2.4.
> * Dependent subprojects use different versions. E.g. Common depends on Avro
> 1.3.2 while MapReduce depends on 1.3.0. Since MapReduce depends on Common,
> this has the potential to cause a problem at runtime.
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