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java.lang.NullPointerException: Name is null	at java.lang.Enum.valueOf(Unknown Source)	at javax.faces.webapp.FacesServlet$HttpMethod.valueOf(FacesServlet.java:172)	at javax.faces.webapp.FacesServlet.isHttpMethodValid(FacesServlet.java:627)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:549)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:582)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:279)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)