Sent invitation cause NPE

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 M7
• Fix Version/s: 7.0.0 M7
• Component/s: Invite Members widget, ~ [Archived] Social Networking
• Labels: None
• Story Points: 9
• Fix Priority: 5
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/29385

Steps to reproduce:

1. Start portal and login.
2. Add Invitation portlet to page.
3. Fill a valid mail address, sent invitation.

Expected result:
Invitation could be sent.

Actual result:
NPE occurred in console.

Note: This would occur no matter if user set up the mail configuration.

02:54:30,556 INFO  [elasticsearch[Baron Strucker][management][T#1]][decider:157] [Baron Strucker] low disk watermark [85%] exceeded on [N-6LchflS6G3hs60-mu5SA][Baron Strucker] free: 20.9gb[14.2%], replicas will not be assigned to this node
02:54:46,684 ERROR [http-bio-8080-exec-6][render_portlet_jsp:131] null
java.lang.NullPointerException
	at sun.misc.MetaIndex.mayContain(MetaIndex.java:243)
	at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:830)
	at sun.misc.URLClassPath.getResource(URLClassPath.java:199)
	at sun.misc.URLClassPath.getResource(URLClassPath.java:251)
	at java.lang.ClassLoader.getBootstrapResource(ClassLoader.java:1305)
	at java.lang.ClassLoader.getResource(ClassLoader.java:1144)
	at java.lang.ClassLoader.getResource(ClassLoader.java:1142)
	at java.lang.ClassLoader.getResource(ClassLoader.java:1142)
	at java.net.URLClassLoader.getResourceAsStream(URLClassLoader.java:227)
	at org.apache.catalina.loader.WebappClassLoader.getResourceAsStream(WebappClassLoader.java:1542)
	at com.liferay.portal.kernel.util.StringUtil.read(StringUtil.java:2115)
	at com.liferay.util.ContentUtil._get(ContentUtil.java:59)
	at com.liferay.util.ContentUtil.get(ContentUtil.java:33)
	at com.liferay.portal.util.LocalizationImpl.getLocalizationMap(LocalizationImpl.java:411)
	at com.liferay.portal.util.LocalizationImpl.getLocalizationMap(LocalizationImpl.java:377)
	at com.liferay.portal.kernel.util.LocalizationUtil.getLocalizationMap(LocalizationUtil.java:147)
	at com.liferay.invitation.web.util.InvitationUtil.getEmailMessageSubjectMap(InvitationUtil.java:88)
	at com.liferay.invitation.web.portlet.action.ViewMVCActionCommand.doProcessAction(ViewMVCActionCommand.java:117)
	at com.liferay.portal.kernel.portlet.bridges.mvc.BaseMVCActionCommand.processAction(BaseMVCActionCommand.java:42)
	at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.callActionMethod(MVCPortlet.java:319)
02:55:00,559 INFO  [elasticsearch[Baron Strucker][management][T#3]][decider:157] [Baron Strucker] low disk watermark [85%] exceeded on [N-6LchflS6G3hs60-mu5SA][Baron Strucker] free: 20.9gb[14.2%], replicas will not be assigned to this node
02:55:03,767 INFO  [localhost-startStop-2][SocialHotDeployListener:153] Social for wiki-web was unregistered
02:55:03,767 INFO  [localhost-startStop-2][PortletHotDeployListener:395] Unregistering portlets for wiki-web