Hi,
We have found that in order to get headless to work properly, you need the
xlib libraries installed. You don't need an xserver _running_, but you need
the libraries, because I think java.awt.* uses them.
Here's a link:
http://javatechniques.com/public/java/docs/hosting/headless-java-x11-librari
es.html
We've also found that JAVA needs help finding them, by adding the following
line to catalina.sh:
export LD_LIBRARY_PATH="/usr/X11/lib"
Also of note is that the error message you get for this condition changes
after the first occurrence.
The very first time you try to generate an image dynamically, you'll get
something like:
org.apache.jasper.JasperException:
/usr/local/applications/j2sdk-1_4_2_04/jre/lib/i386/libawt.so: libXp.so.6:
cannot open shared object file: No such file or directory
All subsequent times, it will be a different message, something like:
java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at java.awt.Toolkit$2.run(Toolkit.java:748)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:739)
Maybe you knew all this, and xvfb (whatever that is) was meant to get around
this. But all of the above works for us.
> -----Original Message-----
> From: indu ss [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, November 16, 2004 9:11 AM
> To: [EMAIL PROTECTED]
> Subject: java.awt.HeadlessException
>
>
> Hi,
>
> I'm using Tomcat 5.0.12,J2sdk1.5 on Linux Fedora 2 .
>
> I need to have a servlet which displays jpg images
> without using Xserver.
> I get this error even after starting tomcat with
> CATALINA_OPTS="-Djava.awt.headless=true"
> and also with Xvfb running.
>
> java.awt.HeadlessException
> at
> java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment
> .java:159)
> at java.awt.Window.<init>(Window.java:310)
> at java.awt.Frame.<init>(Frame.java:419)
> at java.awt.Frame.<init>(Frame.java:384) ......
>
>
>
>
>
>
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