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This exception has no message.
java.lang.NullPointerException: 	at org.apache.cocoon.servletservice.DynamicProxyRequestHandler.invoke(DynamicProxyRequestHandler.java:86)	at undefined.$Proxy20.getPathInfo(Unknown Source)	at org.apache.cocoon.servletservice.spring.ServletFactoryBean$ServiceInterceptor.invoke(ServletFactoryBean.java:262)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)	at undefined.$Proxy19.service(Unknown Source)	at org.apache.cocoon.servletservice.DispatcherServlet.service(DispatcherServlet.java:106)	at javax.servlet.http.HttpServlet.service(Unknown Source)	at com.caucho.server.dispatch.ServletFilterChain.doFilter(Unknown Source)	at org.dspace.app.xmlui.cocoon.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:142)	at com.caucho.server.dispatch.FilterFilterChain.doFilter(Unknown Source)	at org.dspace.app.xmlui.cocoon.DSpaceCocoonServletFilter.doFilter(DSpaceCocoonServletFilter.java:244)	at com.caucho.server.dispatch.FilterFilterChain.doFilter(Unknown Source)	at org.apache.cocoon.servlet.multipart.MultipartFilter.doFilter(MultipartFilter.java:131)	at com.caucho.server.dispatch.FilterFilterChain.doFilter(Unknown Source)	at com.caucho.server.webapp.WebAppFilterChain.doFilter(Unknown Source)	at com.caucho.server.dispatch.ServletInvocation.service(Unknown Source)	at com.caucho.server.http.HttpRequest.handleRequest(Unknown Source)	at com.caucho.server.port.TcpConnection.handleRequests(Unknown Source)	at com.caucho.server.port.TcpConnection$AcceptTask.doAccept(Unknown Source)	at com.caucho.server.port.TcpConnection$AcceptTask.run(Unknown Source)	at com.caucho.util.ThreadPool$Item.runTasks(Unknown Source)	at com.caucho.util.ThreadPool$Item.run(Unknown Source)	at java.lang.Thread.run(Thread.java:619)