chat-portlet from EE4 trunk r 48851/ EE 4.1.1.Beta tag r 48851, cannot be installed on Liferay 6.2-ce-ga5/ Liferay 6.2-ce-ga3.
The .war file was built using the /icefaces/lib/portlets/liferayfaces/liferay-faces-*-4.2.5-ga6.jar files from SVN.

There are server errors when installing the .war file:

INFO: Initializing Spring root WebApplicationContext
18:59:39,681 INFO [localhost-startStop-1][PortletHotDeployListener:344] Registering portlets for chat-portlet
18:59:39,701 ERROR [localhost-startStop-1][PortletBagFactory:411] java.lang.ClassNotFoundException: org.portletfaces.bri
dge.GenericFacesPortlet
java.lang.ClassNotFoundException: org.portletfaces.bridge.GenericFacesPortlet
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
        at com.liferay.portlet.PortletBagFactory.getPortletInstance(PortletBagFactory.java:408)
        at com.liferay.portlet.PortletBagFactory.create(PortletBagFactory.java:121)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.doInvokeDeploy(PortletHotDeployListener.java:370)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:125)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:230)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:257)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:257)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:96)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:164)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:154)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:116)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5016)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5528)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1948)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
18:59:39,712 ERROR [localhost-startStop-1][PortletBagFactory:340] javax.portlet.PortletException: java.lang.NullPointerE
xception
javax.portlet.PortletException: java.lang.NullPointerException
        at com.liferay.portlet.InvokerPortletFactoryImpl.create(InvokerPortletFactoryImpl.java:63)
        at com.liferay.portlet.PortletInstanceFactoryImpl.init(PortletInstanceFactoryImpl.java:225)
        at com.liferay.portlet.PortletInstanceFactoryImpl.create(PortletInstanceFactoryImpl.java:145)
        at com.liferay.portlet.PortletInstanceFactoryUtil.create(PortletInstanceFactoryUtil.java:41)
        at com.liferay.portlet.PortletBagFactory.create(PortletBagFactory.java:337)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.doInvokeDeploy(PortletHotDeployListener.java:370)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:125)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:230)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:257)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:257)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:96)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:164)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:154)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:116)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5016)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5528)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1948)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException
        at com.liferay.portlet.InvokerPortletImpl.<init>(InvokerPortletImpl.java:169)
        at com.liferay.portlet.InvokerPortletFactoryImpl.create(InvokerPortletFactoryImpl.java:56)
        ... 31 more
18:59:39,740 ERROR [localhost-startStop-1][HotDeployImpl:233] com.liferay.portal.kernel.deploy.hot.HotDeployException: E
rror registering portlets for chat-portletchat-portlet
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering portlets for chat-portletchat-portlet
        at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java
:46)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:128)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:230)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:257)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:257)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:96)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:164)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:154)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:116)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5016)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5528)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1948)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: javax.portlet.PortletException: java.lang.NullPointerException
        at com.liferay.portlet.InvokerPortletFactoryImpl.create(InvokerPortletFactoryImpl.java:63)
        at com.liferay.portlet.PortletInstanceFactoryImpl.init(PortletInstanceFactoryImpl.java:225)
        at com.liferay.portlet.PortletInstanceFactoryImpl.create(PortletInstanceFactoryImpl.java:145)
        at com.liferay.portlet.PortletInstanceFactoryUtil.create(PortletInstanceFactoryUtil.java:41)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.initPortletApp(PortletHotDeployListener.java:622)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.doInvokeDeploy(PortletHotDeployListener.java:377)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:125)
        ... 25 more
Caused by: java.lang.NullPointerException
        at com.liferay.portlet.InvokerPortletImpl.<init>(InvokerPortletImpl.java:169)
        at com.liferay.portlet.InvokerPortletFactoryImpl.create(InvokerPortletFactoryImpl.java:56)
        ... 31 more
18:59:39,791 INFO [localhost-startStop-1][HotDeployImpl:217] Deploying kaleo-web from queue
18:59:39,794 INFO [localhost-startStop-1][PluginPackageUtil:1016] Reading plugin package for kaleo-web
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/2-kaleo-web/WEB-INF/classes/portlet.properties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/2-kaleo-web/WEB-INF/classes/service.properties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/2-kaleo-web/WEB-INF/classes/portlet.properties
May 25, 2016 6:59:40 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/2-kaleo-web/WEB-INF/classes/service.properties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/2-kaleo-web/WEB-INF/classes/service.properties
18:59:43,417 INFO [localhost-startStop-1][HookHotDeployListener:709] Registering hook for kaleo-web
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/2-kaleo-web/WEB-INF/classes/portal.properties
18:59:43,451 INFO [localhost-startStop-1][HookHotDeployListener:851] Hook for kaleo-web is available for use
May 25, 2016 6:59:43 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory C:\Servers\liferay-portal-6.2-ce-ga5\tomcat-7.0.62\webapps\marketplace-por
tlet has finished in 13,380 ms
May 25, 2016 6:59:43 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Servers\liferay-portal-6.2-ce-ga5\tomcat-7.0.62\webapps\notifications-portl
et
May 25, 2016 6:59:46 PM org.apache.catalina.startup.TldConfig execute
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete l
ist of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup
 time and JSP compilation time.
18:59:46,380 INFO [localhost-startStop-1][HotDeployEvent:145] Plugin notifications-portlet requires marketplace-portlet

18:59:46,381 INFO [localhost-startStop-1][HotDeployImpl:217] Deploying notifications-portlet from queue
18:59:46,382 INFO [localhost-startStop-1][PluginPackageUtil:1016] Reading plugin package for notifications-portlet
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/4-notifications-portlet/WEB-INF/classes/portlet.pr
operties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/4-notifications-portlet/WEB-INF/classes/service.pr
operties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/4-notifications-portlet/WEB-INF/classes/portlet.pr
operties
May 25, 2016 6:59:46 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/4-notifications-portlet/WEB-INF/classes/service.pr
operties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/4-notifications-portlet/WEB-INF/classes/service.pr
operties
18:59:46,775 INFO [localhost-startStop-1][HookHotDeployListener:709] Registering hook for notifications-portlet
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/4-notifications-portlet/WEB-INF/classes/portal.pro
perties
18:59:47,039 INFO [localhost-startStop-1][HookHotDeployListener:851] Hook for notifications-portlet is available for us
e
18:59:47,042 INFO [localhost-startStop-1][PortletHotDeployListener:344] Registering portlets for notifications-portlet
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/4-notifications-portlet/WEB-INF/classes/portlet.pr
operties
18:59:47,201 INFO [localhost-startStop-1][PortletHotDeployListener:497] 2 portlets for notifications-portlet are availa
ble for use
May 25, 2016 6:59:47 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory C:\Servers\liferay-portal-6.2-ce-ga5\tomcat-7.0.62\webapps\notifications-p
ortlet has finished in 3,436 ms
May 25, 2016 6:59:47 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Servers\liferay-portal-6.2-ce-ga5\tomcat-7.0.62\webapps\opensocial-portlet
May 25, 2016 6:59:54 PM org.apache.catalina.startup.TldConfig execute
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete l
ist of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup
 time and JSP compilation time.
18:59:54,605 INFO [localhost-startStop-1][HotDeployEvent:145] Plugin opensocial-portlet requires marketplace-portlet
18:59:54,606 INFO [localhost-startStop-1][HotDeployImpl:217] Deploying opensocial-portlet from queue
18:59:54,607 INFO [localhost-startStop-1][PluginPackageUtil:1016] Reading plugin package for opensocial-portlet
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/5-opensocial-portlet/WEB-INF/classes/portlet.properties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/5-opensocial-portlet/WEB-INF/classes/service.properties
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/5-opensocial-portlet/WEB-INF/classes/portlet.properties
May 25, 2016 6:59:55 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Loading file:/C:/Servers/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/temp/5-opensocial-portlet/WEB-INF/classes/service.properties