JIRA 7 has landed! Are you an existing JIRA user with questions about upgrading? Visit the Migration Hub for information about upgrading to new JIRA applications

Skip to end of metadata
Go to start of metadata


JIRA fails to start due to a NoClassDefFoundError for org/apache/log4j/Appender.

The following appears in the atlassian-jira.log:


This typically happens because some classes are missing from the $JIRA_INSTALL/lib/ directory, in this case the log4j class. These classes are jar files which can be checked through file system.


  1. Verify if the JAR exists within the $JIRA_INSTALL/lib directory.
  2. If not, download the JIRA version from our downloads archive (this will either be a tarball or a ZIP, depending on the OS. Do not download the installer version).
  3. Extract it into a temporary directory and add in the missing JAR file from the downloaded archive into the $JIRA_INSTALL/lib directory.
Help us improve!
Is this article helpful?
Is it well written?
Is the content complete?