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From Daniel Templeton <dan...@cloudera.com>
Subject DISCUSS: Hadoop Compatability Guidelines
Date Mon, 04 Sep 2017 16:01:16 GMT
All, in prep for Hadoop 3 beta 1 I've been working on updating the 
compatibility guidelines on HADOOP-13714.  I think the initial doc is 
more or less complete, so I'd like to open the discussion up to the 
broader Hadoop community.

In the new guidelines, I have drawn some lines in the sand regarding 
compatibility between releases.  In some cases these lines are more 
restrictive than the current practices.  The intent with the new 
guidelines is not to limit progress by restricting what goes into a 
release, but rather to drive release numbering to keep in line with the 
reality of the code.

Please have a read and provide feedback on the JIRA.  I'm sure there are 
more than a couple of areas that could be improved.  If you'd rather not 
read markdown from a diff patch, I've attached PDFs of the two modified 


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