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From "Ed Kohlwey (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-804) Hadoop 2.0 Support
Date Thu, 11 Oct 2012 14:11:03 GMT
Ed Kohlwey created ACCUMULO-804:
-----------------------------------

             Summary: Hadoop 2.0 Support
                 Key: ACCUMULO-804
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-804
             Project: Accumulo
          Issue Type: Improvement
          Components: client
    Affects Versions: 1.5.0, 1.4.3
            Reporter: Ed Kohlwey
            Assignee: Billie Rinaldi


We should start thinking about Hadoop 2 support now that it is Cloudera's recommended distribution
and many new Hadoop users will probably be adopting it.

When I investigated this first a few months ago it seemed like the biggest barrier to this
was that all the Map/Reduce related tests are implemented using pseudo-private constructors
from Hadoop 1.0 that are no-longer present in Hadoop 2.0.

The main strategy to fix this should probably be to adopt the Map/Reduce cluster test object
for testing the various Accumulo input formats instead of instrumenting them directly. I have
used this convenience object successfully on tests utilizing MockInstance, so I think it should
work fine.

There may also be some filesystem API issues but I don't think they will be too severe.

The other main issue is that we will need to actually deploy on Hadoop 1 and 2 and run the
integration tests once we start supporting both, so that will be a headache for release testing
that we should think through.

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