Upgrade Nutch to Hadoop 0.7
---------------------------

                 Key: NUTCH-383
                 URL: http://issues.apache.org/jira/browse/NUTCH-383
             Project: Nutch
          Issue Type: Improvement
    Affects Versions: 0.9.0
            Reporter: Andrzej Bialecki 
         Assigned To: Andrzej Bialecki 


Upgrade Nutch to Hadoop 0.7, and replace all occurences of UTF8 with Text. UTF8 
is deprecated and its use is discouraged due to its limitations.

This change will break API, in the sense that all third-party additions will 
have to be updated to use new APIs that use Text instead of UTF8 in method 
parameters.

This change also breaks backward compatibility of data in CrawlDb, LinkDb and 
segments. A tool to upgrade CrawlDb, LinkDb and segments can be created to 
facilitate the upgrade path.

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