Confluence Docs 3.0 : Upgrade Guide 2.5.7 This page last changed on Aug 28, 2007 by smaddox. ### Who should upgrade? Confluence 2.5.7 is a recommended upgrade that resolves two issues you may have encountered in Confluence 2.5.6: Indexing errors claiming 'too many open files', caused by duplicate libraries in the Confluence web application. Caching should be enabled by default for the LDAP configuration in `atlassian-user.xml`. Confluence 2.5.7 can be downloaded from http://www.atlassian.com/software/confluence/ConfluenceDownloadCenter.jspa, and is a free upgrade for all customers who purchased their Confluence license or maintenance renewal after 30 August 2006. If you are running a release older than 2.5 and you want to upgrade, you should upgrade directly to 2.5.7. Refer to the upgrade procedure below. ### Upgrade Procedure Upgrading Confluence should be fairly straightforward. We strongly recommend that you backup your `confluence.home` directory and database before upgrading! If you are upgrading from Confluence 2.2.x or a later version, please use the Confluence Upgrade Instructions. If you are upgrading directly from 2.1 or earlier, you should also read the 2.2 Release Notes for warnings about the 2.1 -> 2.2 upgrade.

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