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https://issues.apache.org/jira/browse/AVRO-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845517#comment-13845517
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Tom White commented on AVRO-1410:
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You can build against different versions of Hadoop by specifying
{{-Dhadoop1.version=...}} for Hadoop 1, or {{-Dhadoop.version=2
-Dhadoop2.version=...}} for Hadoop 2.
Also, Hadoop is a provided (or test) dependency for avro-mapred so you can use
a different version of Hadoop at runtime, as long as it is the same major
version (1 or 2).
> Explicit version specification in pom prevents dependency management
> --------------------------------------------------------------------
>
> Key: AVRO-1410
> URL: https://issues.apache.org/jira/browse/AVRO-1410
> Project: Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.7.5
> Reporter: E. Sammer
> Assignee: E. Sammer
> Fix For: 1.7.6
>
> Attachments: AVRO-1410-2.patch, AVRO-1410.patch
>
>
> While building Avro against different versions of Hadoop I found that
> avro-mapred explicitly specifies the versions of some of the Hadoop
> dependencies rather than deferring to its own dependency management. This
> makes it impossible to build against other versions of Hadoop without
> pom-hackery. It's also a potential maintenance issue for Avro in that changes
> to the dependency management section of the Java top level pom won't be
> picked up by the mapred module.
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