Error occurred while starting Plugin Manager. Duplicate plugin found (installed version is the same or older) and could not be unloaded
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
The following appears in atlassian-jira.log:
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2013-07-02 11:02:37,320 localhost-startStop-1 FATAL [atlassian.jira.upgrade.PluginSystemLauncher] A fatal error occurred during initialisation. JIRA has been locked.
com.atlassian.jira.InfrastructureException: Error occurred while starting Plugin Manager. Duplicate plugin found (installed version is the same or older) and could not be unloaded: 'com.atlassian.jira.plugin.ext.subversion'
at com.atlassian.jira.ComponentManager$PluginSystem.start(ComponentManager.java:681)
at com.atlassian.jira.ComponentManager.startJIRA(ComponentManager.java:220)
...
Caused by: com.atlassian.plugin.PluginParseException: Duplicate plugin found (installed version is the same or older) and could not be unloaded: 'com.atlassian.jira.plugin.ext.subversion'
at com.atlassian.plugin.manager.DefaultPluginManager.addPlugins(DefaultPluginManager.java:689)
at com.atlassian.plugin.manager.DefaultPluginManager.init(DefaultPluginManager.java:178)Cause
Duplicate JIRA Subversion Plugin installed.
Resolution
Shutdown JIRA instance
Navigate to the
JIRA Home Directory\plugins\installed-pluginsdirectoryFrom there, locate the Subversion plugin(s) and remove the duplicate .jar plugin from the directory
Restart JIRA instance
Perform re indexing process
If upgrading JIRA Subversion Plugin to version 0.10.12 or later :
Shutdown JIRA instance
Remove the following file in the folder "<JIRA instance>/atlassian-jira/WEB-INF/lib
atlassian-subversion-plugin-*.jar
javasvn-*.jar (if any)
svnkit-*.jar (if any)
ganymed-*.jar (if any)
trilead-*.jar (if any)
Restart JIRA.
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