[CONF] Apache Solr Reference Guide > Upgrading to Solr 4.1

["Hoss Man (Confluence)" <co...@apache.org>]

Space: Apache Solr Reference Guide (https://cwiki.apache.org/confluence/display/solr)
Page: Upgrading to Solr 4.1

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If you are already using Solr 4.0, moving to Solr 4.1 should not present any major problems. However, you should review the {{CHANGES.txt}} file found in your Solr package for changes and updates that may effect your existing implementation.

During updates for this guide, we found one thing that you may want to be aware of, which is a change to the way Solr identifies node names for SolrCloud. If you are using SolrCloud, you may have issues with unknown or lost nodes. If this occurs, you can manually set the {{host}} parameter either in {{solr.xml}} or as a system variable. More information can be found in the section on [solr:SolrCloud].

With any Solr update, it is recommended that you re-index your content for use with Solr 4.1.

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