So, i tried on the Liferay7 Wildfly Bundle (GA1 and GA2) and i get the same error.
It seems it "deploys" correctly but gets unregistered automatically.
This demo portlet
https://github.com/liferay/liferay-faces-bridge-impl/tree/4.x/demo/primefaces-applicant-portlet
Also tried with the maven archetype
com.liferay.faces.archetype.primefaces.portlet
Exact same issue.
08:34:46,065 INFO [com.liferay.portal.kernel.deploy.auto.AutoDeployScanner][AutoDeployDir:250] Processing com.liferay.faces.demo.primefaces.applicant.portlet-4.0.0-SNAPSHOT.war
08:34:53,476 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][BaseAutoDeployListener:42] Copying portlets for /tmp/20160805083453464ZXNIWOAE/com.liferay.faces.demo.primefaces.applicant.portlet-4.0.0-SNAPSHOT.war
08:34:53,518 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][BaseDeployer:860] Deploying com.liferay.faces.demo.primefaces.applicant.portlet-4.0.0-SNAPSHOT.war
08:34:53,793 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][BaseAutoDeployListener:50] Portlets for /tmp/20160805083453464ZXNIWOAE/com.liferay.faces.demo.primefaces.applicant.portlet-4.0.0-SNAPSHOT.war copied successfully
08:34:57,852 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][BaseAutoDeployListener:42] Copying portlets for /tmp/20160805083453464ZXNIWOAE/com.liferay.faces.demo.primefaces.applicant.portlet-4.0.0-SNAPSHOT.war
08:34:57,877 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][BaseDeployer:860] Deploying com.liferay.faces.demo.primefaces.applicant.portlet-4.0.0-SNAPSHOT.war
08:34:57,980 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][BaseAutoDeployListener:50] Portlets for /tmp/20160805083453464ZXNIWOAE/com.liferay.faces.demo.primefaces.applicant.portlet-4.0.0-SNAPSHOT.war copied successfully
08:35:01,821 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][HotDeployImpl:222] Deploying comliferayfacesdemoprimefacesapplicantportlet-400-SNAPSHOT from queue
08:35:01,823 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][PluginPackageUtil:1006] Reading plugin package for comliferayfacesdemoprimefacesapplicantportlet-400-SNAPSHOT
08:35:01,843 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][PortletHotDeployListener:202] Registering portlets for comliferayfacesdemoprimefacesapplicantportlet-400-SNAPSHOT
08:35:02,146 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][PortletHotDeployListener:331] 1 portlet for comliferayfacesdemoprimefacesapplicantportlet-400-SNAPSHOT is available for use
08:35:02,346 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][PortletHotDeployListener:364] Unregistering portlets for comliferayfacesdemoprimefacesapplicantportlet-400-SNAPSHOT
08:35:02,368 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][PortletHotDeployListener:394] 1 portlet for comliferayfacesdemoprimefacesapplicantportlet-400-SNAPSHOT was unregistered
08:35:02,374 INFO [fileinstall-/opt/liferay-portal-7.0-ce-ga1/osgi/war][PluginPackageUtil:1006] Reading plugin package for comliferayfacesdemoprimefacesapplicantportlet-400-SNAPSHOT
