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From "Patrick Willart" <patr...@aptitudexchange.com>
Subject RE: Off-topic - Java and X11 Window Server
Date Wed, 07 Jan 2004 19:26:08 GMT
Dear Jose,

This is the document that put me on the right track. Set the DISPLAY
variable as an environment variable for the user that start Tomcat. The
variable has to be set before Tomcat is started

<snippet of document>
To run Xvfb in a manner that pleases Java, try:

/usr/X11R6/bin/Xvfb :1 -screen 0 800x600x24

This will create a virtual display at :1.0 with a size of 800 by 600 pixels
and a color depth of 24 bits. To ensure that Java draws to this display, you
must set the DISPLAY environment variable to :1.0 before invoking Java.  If
Java throws any X11Environment exceptions, try changing the color  depth or
screen size. In my experience 16 or 24 bits has always worked.
</snippet of document>

grts,

Patrick

-----Original Message-----
From: Jose Euclides da Silva Junior - DATAPREVRJ
[mailto:Jose.Euclides@previdencia.gov.br]
Sent: Wednesday, January 07, 2004 11:51 AM
To: 'Tomcat Users List'; 'patrick@aptitudexchange.com'
Subject: RES: Off-topic - Java and X11 Window Server


Dear Patrick,
Where (and HOW ) should i set it?
Thanks in advance,
José Euclides Junior
Projeto DOP201
Infra-estrutura J2EE para as aplicações corporativas da Previdência Social


-----Mensagem original-----
De: Patrick Willart [mailto:patrick@aptitudexchange.com]
Enviada em: quarta-feira, 7 de janeiro de 2004 16:51
Para: Tomcat Users List
Assunto: RE: Off-topic - Java and X11 Window Server


I am not an expert on any *nix system, but faced the same problem once.

I had to set to DISPLAY varirable to :1.0 (export DISPLAY=:1.0). It is
important that this is set for the same user that is running Tomcat.

grts,

Patrick

-----Original Message-----
From: Jose Euclides da Silva Junior - DATAPREVRJ
[mailto:Jose.Euclides@previdencia.gov.br]
Sent: Wednesday, January 07, 2004 10:55 AM
To: 'tomcat-user@jakarta.apache.org'
Subject: Off-topic - Java and X11 Window Server


Hi guys,
Have anybody ever seen this error before? The X11 seems to be alive at my
environment --> Conectiva Linux. The target Java app,GraficoBig, works with
a free package, called org.jfree.char and org.jfree.gui.

500 Internal Server Error
java.lang.InternalError: Can't connect to X11 window server using ':0.0' as
the value of the DISPLAY variable.
	at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
	at
sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:54)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:115)
	at
java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment
.java:53)
	at java.awt.Window.<init>(Window.java:183)
	at java.awt.Frame.<init>(Frame.java:310)
	at java.awt.Frame.<init>(Frame.java:289)
	at javax.swing.JFrame.<init>(JFrame.java:167)
	at org.jfree.ui.ApplicationFrame.<init>(Unknown Source)
	at mypackage2.GraficoBig.<init>(GraficoBig.java:26)
	at _Jspbig._jspService(_Jspbig.java:128)
	[SRC:Jspbig.jsp:118]
regards,
José Euclides Junior
Projeto DOP201
Infra-estrutura J2EE para as aplicações corporativas da Previdência Social



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