Type Exception Report
Message An exception occurred processing [detail/wallpaper.jsp] at line [52]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: An exception occurred processing [detail/wallpaper.jsp] at line [52] 49: <div class="wallBox" style="float:right; border:solid black 1px; padding:0 0 0 10px;"> 50: <% 51: String os = HttpUtils.getOperatingSystem( reqData.getUserAgent() ); 52: if( os.indexOf("windows") == 0 ) 53: { 54: %><b>Installing to PC</b><br> 55: 1. Save file to My Documents/My Pictures<br> Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:610) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:499) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327) javax.servlet.http.HttpServlet.service(HttpServlet.java:764) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
java.lang.NullPointerException: Cannot invoke "String.indexOf(String)" because "os" is null org.apache.jsp.detail.wallpaper_jsp._jspService(wallpaper_jsp.java:483) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:764) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327) javax.servlet.http.HttpServlet.service(HttpServlet.java:764) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Note The full stack trace of the root cause is available in the server logs.