I ran into a similar problem once.
The problem you are running into is that the Image classes in the Java package
make use of the java.awt.Toolkit. For that class to work correctly, it has to
connect to a graphics system (i.e. X ). Since Windows 'always' has a graphics
engine running, it would work fine under Win/WinNT.
If your server isn't running X, then you may not be able to use the Java
graphics code to generate the dynamic image. You may want to look at some other
utility that will do the same.
If your server is running X, then you need to check the .Xauthority for the user
the webserver is running under. It could be a permissions problem.
Jere
David Talbot <[EMAIL PROTECTED]>
06/28/2000 03:08 PM
Please respond to [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
cc: (bcc: Jere McDevitt/SSC/THD)
Subject: [expert] DISPLAY variable Java?
I have a webserver (LM7.0, Apache 1.3.12, JServ 1.1.1, GNUJSP 1.0, Sun JDK
1.2.2) that gets the following error on ant attempt to generate a dynamic
image... works on Windoz 9x(Apache 1.3.12, Jserv1.1.1 GNUJSP1.0 and Sun
JDK1.2.2) and SCO Unix (Netscape Enterprise, Skunkware JDK1.2.2).
I know it has to have something to do with the display variable, but I've
tried setting it to:
IPADDRESS:
DISPLAY=192.ect.ect.ect:0
DNS Name:
DISPLAY=spock:0
Simple:
DISPLAY=:0
What should I set the display variable to so that a Java servlet can get to it?
-David Talbot
[28/06/2000 15:11:40:266 CDT] java.lang.InternalError: Can't connect to X11
wind
ow server using 'spock:0' as the value of the DISPLAY variable.
at
org.apache.jserv.JServConnection.processRequest(JServConnection.java,
Compiled Code)
at org.apache.jserv.JServConnection.run(JServConnection.java,
Compiled C
ode)
at java.lang.Thread.run(Thread.java, Compiled Code)
[28/06/2000 15:11:55:687 CDT] java.lang.NoClassDefFoundError:
sun/awt/X11Graphic
sEnvironment
at
org.apache.jserv.JServConnection.processRequest(JServConnection.java,
Compiled Code)
at org.apache.jserv.JServConnection.run(JServConnection.java,
Compiled C
ode)
at java.lang.Thread.run(Thread.java, Compiled Code)
.
