'ERROR Could not instantiate appender named confluencelog' on Startup
On startup, the following appears in the
Parent Classloader: org.apache.catalina.loader.StandardClassLoader@df1832]. log4j:ERROR Could not instantiate appender named "confluencelog". log4j:ERROR A "com.atlassian.confluence.logging.ConfluenceHomeLogAppender" object is not assignable to a "org.apache.log4j.Appender" variable. log4j:ERROR The class "org.apache.log4j.Appender" was loaded by log4j:ERROR [com.atlassian.plugin.classloader.PluginClassLoader@6044d5] whereas object of type log4j:ERROR "com.atlassian.confluence.logging.ConfluenceHomeLogAppender" was loaded by [WebappClassLoader delegate: false repositories: /WEB-INF/classes/
The error does not cause any visible effect in Confluence performance or operation.
The error can be caused by a plugin that tries to assign a
com.atlassian.confluence.logging.ConfluenceHomeLogAppender object to the
Ensure that all plugins are up to date:
Using the Universal Plugin Manager, identify outdated plugins.
Prior to the Universal Plugin Manager, it may be necessary to uninstall old plugins one by one to determine which plugin is responsible. You can track old plugins from the database by their last modification date:
select plugindataid, pluginkey, filename, lastmoddate from plugindata ORDER BY lastmoddate;
- Remove the outdated plugin. This may be done directly from
Administration >> Plugins. If that does not work, refer to How to manually remove malfunctioning add-ons.