[jira] [Created] (HBASE-26522) Improve documentation of hbase 1.x to 2.x potential incompatibilities

["Bryan Beaudreault (Jira)" <ji...@apache.org>]

Bryan Beaudreault created HBASE-26522:
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             Summary: Improve documentation of hbase 1.x to 2.x potential incompatibilities
                 Key: HBASE-26522
                 URL: https://issues.apache.org/jira/browse/HBASE-26522
             Project: HBase
          Issue Type: Improvement
            Reporter: Bryan Beaudreault


We're working on a major upgrade of almost 900 tables across 100 production clusters (and corresponding QA environment clusters). We've upgraded about 25% of our QA environment and run into a series of incompatibilities along the way. Most of them have been easy to get around, but I wanted to create this Jira to collect them so that we can make an update to the docs for future upgraders.

My plan is to periodically edit this description to add to the list. If anyone else has anything to contribute, feel free to edit as well or add a comment. 

Incompatibilities to document:

- https://issues.apache.org/jira/browse/HBASE-15676 changed the serialized byte string used for the fuzzy mask. FuzzyRowFilters created by older clients will not match any rows in an hbase2 cluster.



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