In trunk, you can run Hadoop successfully with only JAVA_HOME defined.  
But I think most users typically configure HADOOP_PREFIX to go with it.

        Is there some setting that REEF is looking for particularly?  

On Aug 28, 2014, at 11:40 AM, Markus Weimer <[email protected]> wrote:

> Hi,
> 
> over on the (not yet Apache-fied) REEF mailing list, we have people ask
> about running REEF examples on the Hortonworks sandbox. Surprisingly, that
> doesn't work.
> 
> I tracked down the issue to a rather fundamental one: REEF assumes that the
> usual Hadoop environment variables are set (HADOOP_HOME, HADOOP_CONF_DIR,
> ...) both at the client machine and for the AM and all containers launched.
> However, those aren't set in the sandbox install.
> 
> Does this mean that the sandbox setup is broken or that we were doing it
> wrong when assuming that those environment variables are always set?
> 
> Thanks,
> 
> Markus

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