That was the old way to fix a bug in the JVM I believe. Anyways nowadays you can pass the following option to the server when starting: -Djava.awt.headless=true
That will prevent the errors mentioned below when you don't have a graphical shell running on your system. Regards, Wouter -----Original Message----- From: Ben Kim [mailto:[EMAIL PROTECTED] Sent: Friday, January 13, 2006 7:54 AM To: Tomcat Users List Subject: Re: Image Scaling Code This may or may not be the case with you. I had a similar error (X11, DISPLAY) with an earlier version of tomcat included in a 3rd party package, on linux. After I installed Xvfb (x virtual frame buffer) server rpm, the error went away. (http://www.xfree86.org/4.0.1/Xvfb.1.html) I think there was a clue in the error log. If you're on Fedora, you can just do yum install xorg-x11-Xvfb or do yum search Xvfb. I don't think I had to "run" it actually. Don't know if it will help you, but just in case. Regards, Ben Kim Developer http://benix.tamu.edu On 1/12/06, Justin Jaynes <[EMAIL PROTECTED]> wrote: > > Hello all, > > I've written a java class to scale jpeg images. But I can't seem to > get it to work. Can anyone point me in the right direction? > > Here is my code: > > > package com.everybuddystree; > > import java.awt.*; > import java.awt.image.*; > import java.io.*; > import javax.imageio.*; > > public class ImageScaler { > > public ImageScaler() { > } > > public boolean scaleImageByWidth(String fileName, int newWidth) { > > File originalImage = new File(fileName); > try { > BufferedImage workingBufferedImage = ImageIO.read(originalImage); > int width = workingBufferedImage.getWidth(); > int height = workingBufferedImage.getHeight(); > Image workingImage = workingBufferedImage; > workingImage = (Image)workingImage.getScaledInstance(newWidth,-1,1); > BufferedImage finalImage = (BufferedImage)workingImage; > ImageIO.write(finalImage, "jpg", originalImage); > > return true; > > } catch (IOException ex){ > > return false; > > } > > } > > } > > When I run the pass an image to the class using a jsp I get the > following errors from Tomcat: > > > HTTP Status 500 - > --------------------------------- > type Exception report > message > description The server encountered an internal error () that prevented > it from fulfilling this request. > exception > javax.servlet.ServletException: Can't connect to X11 window server > using ':0.0' as the value of the DISPLAY variable. > org.apache.jasper.runtime.PageContextImpl.doHandlePageException( > PageContextImpl.java:848) > org.apache.jasper.runtime.PageContextImpl.handlePageException( > PageContextImpl.java:781) org.apache.jsp.image_jsp._jspService( > org.apache.jsp.image_jsp:158) > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) > javax.servlet.http.HttpServlet.service(HttpServlet.java:802) > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper. > java > :322) > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java > :314) > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) > javax.servlet.http.HttpServlet.service(HttpServlet.java:802) root > cause > java.lang.InternalError: Can't connect to X11 window server using ':0.0' > as the value of the DISPLAY variable. > sun.awt.X11GraphicsEnvironment.initDisplay(Native Method) > sun.awt.X11GraphicsEnvironment.access$000(X11GraphicsEnvironment.java > :53) sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java > :142) java.security.AccessController.doPrivileged(Native Method) > sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:13 > 1) java.lang.Class.forName0(Native Method) java.lang.Class.forName( > Class.java:164) > java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment( > GraphicsEnvironment.java:68) > sun.awt.X11.XToolkit.<clinit>(XToolkit.java > :96) java.lang.Class.forName0(Native Method) > java.lang.Class.forName( > Class.java:164) java.awt.Toolkit$2.run(Toolkit.java:821) > java.security.AccessController.doPrivileged(Native Method) > java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804) > java.awt.Image.getScaledInstance(Image.java:158) > com.everybuddystree.ImageScaler.scaleImageByWidth(ImageScaler.java:21) > org.apache.jsp.image_jsp._jspService(org.apache.jsp.image_jsp:114) > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) > javax.servlet.http.HttpServlet.service(HttpServlet.java:802) > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper. > java > :322) > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java > :314) > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) > javax.servlet.http.HttpServlet.service(HttpServlet.java:802) note The > full stack trace of the root cause is available in the Apache Tomcat/5.5.12 logs. > > --------------------------------- > Apache Tomcat/5.5.12 > > > > > > > --------------------------------- > Yahoo! Photos ?Showcase holiday pictures in hardcover Photo Books. You > design it and we'll bind it! > -- "You can lead a horse to water but you cannot make it float on its back." ~Dakota Jack~ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
