JSF 2 getting issue in Tomcat 7

There is an JSF 2.1 bug which cause Tomcat 7 problem. You will get below error if you are using JSF 2.1 under Tocmcat 7.

java.lang.InstantiationException: com.sun.faces.application.ServletContextSensitiveSingletonStore at java.lang.Class.newInstance0(Class.java:340) at java.lang.Class.newInstance(Class.java:308) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4268) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4771) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:138) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:785) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:763) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:558) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:674) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:599) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:538) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1390) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:355) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:89) at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:312) at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:292) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:998) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:772) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:138) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:990) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:275) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:138) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:424) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:138) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:648) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:138) at org.apache.catalina.startup.Catalina.start(Catalina.java:576) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:415)

To fix this you must switch back to JSF 2.0.X stable version.