JIRA Agile Installation Fails - Unable to load interface class

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Symptoms

JIRA Agile is not working and under Administration -> System -> Plugins you may see the following error:

There was a problem loading the module descriptor: GreenHopper License Store.<br/>Unable to load interface class: com.pyxis.greenhopper.jira.license.GreenHopperLicenseStore

Or the following error in the logs:

[atlassian.plugin.manager.DefaultPluginManager] There was an error loading the descriptor 'GreenHopper License Store' of plugin 'com.pyxis.greenhopper.jira'. Disabling.
com.atlassian.plugin.PluginException: Unable to load interface class: com.pyxis.greenhopper.jira.license.GreenHopperLicenseStore

Cause

When installing the JIRA Agile Plugin there is no need to unarchive the .jar file - if you do so it can cause numerous errors in both the logs as well as in JIRA under Administration -> System -> Plugins. It will also prevent JIRA Agile from functioning correctly.

Resolution

Simply removing the contents of the unarchived .jar, installing only the JIRA Agile.jar and restarting JIRA will resolve this issue.

Last modified on Aug 26, 2013

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