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Upgrading search

Use this information to migrate the search subsystem during an upgrade to 5.2.
Important: The Lucene search subsystem is not available in 5.2.
Important: During an upgrade, Solr 4 needs to reindex the entire repository. While reindexing is in progress, you may use Solr 1 for basic search functionality - new functionality enabled by Solr 4 (such as filtered searches) will not be available, and you may encounter other issues with search capabilities.