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LUCENE-2048: add solr upgrade note 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1145657 13f79535-47bb-0310-9956-ffa450edef68
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Robert Muir 2011-07-12 16:23:08 +00:00
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commit ea262d0ddb
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solr/CHANGES.txt
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@ -295,6 +295,15 @@ Documentation
======================= 3.x (not yet released) ================
Upgrading from Solr 3.3
----------------------
* The Lucene index format has changed and as a result, once you upgrade,
previous versions of Solr will no longer be able to read your indices.
In a master/slave configuration, all searchers/slaves should be upgraded
before the master. If the master were to be updated first, the older
searchers would not be able to read the new index format.
New Features
----------------------