org.apache.jasper.JasperException: java.lang.NullPointerException

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org.apache.jasper.JasperException: java.lang.NullPointerException	at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:556)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:477)	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:486)	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)	at org.openxava.web.servlets.Servlets.getURIAsString(Servlets.java:120)	at org.openxava.web.servlets.Servlets.getURIAsString(Servlets.java:99)	at org.openxava.web.dwr.Module.getURIAsString(Module.java:211)	at org.openxava.web.dwr.Module.fillResult(Module.java:233)	at org.openxava.web.dwr.Module.request(Module.java:97)	at sun.reflect.GeneratedMethodAccessor146.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.directwebremoting.impl.ExecuteAjaxFilter.doFilter(ExecuteAjaxFilter.java:34)	at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428)	at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:431)	at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:283)	at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:52)	at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101)	at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)Caused by: java.lang.NullPointerException	at org.apache.jsp.phone.buttonBar_jsp._jspService(buttonBar_jsp.java:248)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)	... 49 more