Steve Loughran updated HADOOP-13852:
    Attachment: HADOOP-13852-001.patch

Patch allows a build with an argument like {{-Ddeclared.hadoop.version=2.11}} 
to specify the build to be returned via an API call.

When you do a build with that option, Spark DF test runs do appear to work 

> hadoop build to allow hadoop version property to be explicitly set
> ------------------------------------------------------------------
>                 Key: HADOOP-13852
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13852
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: build
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>         Attachments: HADOOP-13852-001.patch
> Hive (and transitively) Spark, won't start on Hadoop 3.x as the shim layer 
> rejects Hadoop v3. As a workaround pending a Hive fix, allow the build to 
> have the Hadoop version (currently set to pom.version) to be overridden 
> manually.
> This will not affect version names of artifacts, merely the declared Hadoop 
> version visible in {{VersionInfo.getVersion()}}

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