I am trying to migrate a java application which consist of some graph charts from Windows to Linux but I am getting following the exception:
java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
at java.awt.Window.<init>(Window.java:432)
at java.awt.Frame.<init>(Frame.java:403)
at java.awt.Frame.<init>(Frame.java:368)
at javachart.servlet.Bean.makeURLImage(Unknown Source)
at javachart.applet.ParameterParser.makeURLImage(Unknown Source)
at javachart.applet.ParameterParser.populateGc(Unknown Source)
at javachart.applet.ParameterParser.getDatasetPropertiesFromParameters(Unknown Source)
at javachart.applet.ParameterParser.getDatasetParameters(Unknown Source)
at javachart.applet.ParameterParser.getDataset(Unknown Source)
at javachart.applet.ParameterParser.getDatasets(Unknown Source)
at javachart.applet.ParameterParser.getOptions(Unknown Source)
at javachart.servlet.Bean.getOptions(Unknown Source)
at javachart.servlet.labelLineApp.init(Unknown Source)
at javachart.servlet.Bean.buildChart(Unknown Source)
at javachart.servlet.Bean.generate(Unknown Source)
at javachart.servlet.Bean.getFileName(Unknown Source)
at org.apache.jsp.www.SaveHtml.chartByHotelSNS_jsp._jspService(chartByHotelSNS_jsp.java:676)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)
I also tried with setting the Display environment variable through Putty but that also didn’t work.
Can anyone tell me where exactly the problem is?
Is it in the application or linux side?
You need to somehow set System.setProperty(“java.awt.headless”, “true”);
Tell the server team to start whatever Java they are starting with an additional command line parameter