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    This happens when you try to instantiate a class that can't be instantiated, either because the class object is abstract, an interface, an array class, a primitive type, void, or because the class has no nullary constructor.

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java.lang.InstantiationException: 	at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:30)	at java.lang.reflect.Constructor.newInstance(Constructor.java:274)	at java.lang.Class.newInstance0(Class.java:308)	at java.lang.Class.newInstance(Class.java:261)	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:889)	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:813)	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3478)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:3760)	at com.iplanet.ias.web.WebModule.start(WebModule.java:245)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1133)	at org.apache.catalina.core.StandardHost.start(StandardHost.java:652)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1133)	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:355)	at org.apache.catalina.startup.Embedded.start(Embedded.java:995)	at com.iplanet.ias.web.WebContainer.start(WebContainer.java:429)	at com.iplanet.ias.web.WebContainer.startInstance(WebContainer.java:498)	at com.iplanet.ias.server.J2EERunner.confPostInit(J2EERunner.java:161)