Question

java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment

Asked by: Rrugemalira

I'm using NetBeans 5.5.1 IDE with Visual Web Pack. My OS is Linux Fedora Core 6 and the server is Sun Java System Application Server.
I'm developing an application which includes a JSP to display a bar-chart graph using CeWolf.
I get the following two severe errors on running the JSP:

1.  Message ID: StandardWrapperValve[CewolfServlet]
Servlet.service() for servlet CewolfServlet threw exception
java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment
at java.lang.Class.forName0(Native Method)

2.Message ID: CewolfServlet
Could not initialize class sun.awt.X11GraphicsEnvironment
java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment
      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.awt.X11.XToolkit.<clinit>(XToolkit.java:89)
 
 I'd appreciate your kind guidance in solving this problem    

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Asked On
2007-10-09 at 09:44:50ID22881852
Tags

initialize

,

could

,

class

Topics

Sun Java System Web Server

,

Java Server Pages (JSP)

,

Java Servlets

Participating Experts
2
Points
500
Comments
5

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Answers

 

by: VenabiliPosted on 2007-10-09 at 10:05:08ID: 20042549

Do you have a X11 server daemon running on the server? Because this class is using native codes which on Unix need X11.
The other option would be to use PJA Toolkit (http://www.eteks.com/pja/en/) instead of the standard AWT

Although... which JDK you use? For 1.4.2+,  it may be enough to use java.awt.headless=true
setProperty( "java.awt.headless", true ); in the code or as a start parameter.

 

by: RrugemaliraPosted on 2007-10-09 at 11:44:43ID: 20043400

I'm using jdk1.6.0_02
The system monitor shows I have Xorg sleeping but consuming CPU. Moreover, I'm working in graphics mode with the netbeans IDE and I can see some graphics on the JSP pages when my application is running (except for the chart component)
You will forgive my ignorance, but I do now know where to setProperty("java.awt.headless", true)
In which code do I set it? In the jsp that renders the chart? In the bean that implements the dataset producer?

 

by: VenabiliPosted on 2007-10-09 at 11:48:04ID: 20043434

Honesly - I do not remember.. Haven't touched AWT from years. I would try with the bean.

The error is definitely claiming that there is no X server.

 

by: rrz@871311Posted on 2007-10-09 at 17:25:57ID: 20045588

 

by: RrugemaliraPosted on 2007-10-10 at 12:43:47ID: 20051636

I entered into Sun Java System Application Server Administration Console
Clicked on:
Application Server --> JVM Settings --> JVM Options
and added the JVM option: -Djava.awt.headless=true
Stopped the server and re-started it.
I'm now able to display the bar-chart graphics. Praise be to God!
I thank all of you for your kind help.

20120131-EE-VQP-002

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