症状

Confluence does not start.

atlassian-confluence.log に次のメッセージが表示される。

ERROR [main] [confluence.search.lucene.ConfluenceSearcherInitialisation] initialise Error encountered while warming up searcher: LUCENE_31
java.lang.NoSuchFieldError: LUCENE_31

原因

This error usually happens due a corrupted installation directory.

ソリューション

1. Confluence をシャットダウンします。
2. Create a backup of the entire Confluence installation directory
3. Download a new standalone zip file (same version of your current Confluence)
4. Extract it
5. Replace the current installation directory with the newly extracted files. However please keep the following files from your current installation directory and replace the ones in the new installation directory with them:
   server.xml located in <CONF_Install_Dir>/conf/
   confluence-init.properties located in <CONF_Install_Dir>/confluence/WEB-INF/classes/
6. Confluence を再起動します。

If you face any problems regarding plugins, please clear your plugin cache.