[!] Error

AWT is not properly configured on this server. Perhaps you need to run your container with "-Djava.awt.headless=true"?

java.lang.InternalError: Can't connect to X11 window server using '' as the value of the DISPLAY variable.
	at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
	at sun.awt.X11GraphicsEnvironment.access$100(X11GraphicsEnvironment.java:52)
	at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:155)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.awt.X11GraphicsEnvironment.(X11GraphicsEnvironment.java:131)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:169)
	at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
	at sun.font.FontManager.initSGEnv(FontManager.java:1307)
	at sun.font.FontManager.findFont2D(FontManager.java:1984)
	at java.awt.Font.getFont2D(Font.java:455)
	at java.awt.Font.getFamily(Font.java:1144)
	at java.awt.Font.getFamily_NoClientCode(Font.java:1118)
	at java.awt.Font.getFamily(Font.java:1110)
	at java.awt.Font.toString(Font.java:1607)
	at hudson.util.ChartUtil.(ChartUtil.java:229)
	at hudson.WebAppMain.contextInitialized(WebAppMain.java:179)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:905)
	at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:740)
	at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:500)
	at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
	at org.apache.catalina.core.StandardService.start(StandardService.java:519)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)