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Published Jul. 2, 2025

SAML Plugin Throws NPE When Trying to Access Metadata

Written By

Brett Ripley

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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

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