SAML Plugin Throws NPE When Trying to Access Metadata

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable.

With "liferay-fix-pack-plugin-deployment-1-6120.zip" installed an error occurs while trying to access http://localhost:8080/c/portal/saml/metadata". When attempting access, "Internal Server Error" occurs in the page and the following exception is shown in the logs:

org.opensaml.saml2.metadata.provider.MetadataProviderException:java.lang.NullPointerException

Resolution

1. Shutdown the Liferay Server.
2. Clear Work and Temp folders from $APP_SERVER_HOME
3. Delete the SAML plugin directory from your webapps directory in $APP_SERVER_HOME
4. Please add the following property to your portal-ext.properties in addition to the SAML properties referred to in the guide:

   	hot.deploy.listeners=\
   	com.liferay.portal.deploy.hot.PluginPackageHotDeployListener,\
   
   	\
   
   	com.liferay.portal.deploy.hot.ServletContextListenerHotDeployListener,\
   
   	\
   
   	com.liferay.portal.deploy.hot.SpringHotDeployListener,\
   
   	\
   
   	com.liferay.portal.deploy.hot.ExtHotDeployListener,\
   
   	com.liferay.portal.deploy.hot.HookHotDeployListener,\
   
   	com.liferay.portal.deploy.hot.LayoutTemplateHotDeployListener,\
   
   	com.liferay.portal.deploy.hot.PortletHotDeployListener,\
   
   	com.liferay.portal.deploy.hot.SocialHotDeployListener,\
   
   	com.liferay.portal.deploy.hot.ThemeHotDeployListener,\
   
   	com.liferay.portal.deploy.hot.ThemeLoaderHotDeployListener,\
   
   	\
   
   	com.liferay.portal.deploy.hot.MessagingHotDeployListener
   	    

5. Obtain the Plugin Deployment 1 fixpack.
6. Place the liferay-fixpack-plugin-deployment-1-6120 in the /patching-tool/patches folder. By default, the patching-tool folder is located within $LIFERAY_HOME.
7. Run patching-tool install to install the patch and execute patching-tool info to confirm.
8. Deploy the SAML portlet again
9. Restart the server.

Attempt to access http://localhost:8080/c/portal/saml/metadata

The XML content should be shown now.

Additional Information

See LPS-25238