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https://issues.apache.org/jira/browse/WICKET-699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12508262
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Johan Compagner commented on WICKET-699:
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hmm the first one is even an Error i dont want to catch errors in wicket code.
if somebody gets an stack like that then they should google what to do if they
dont know already.
> Recover gracefully when no graphics display is available
> --------------------------------------------------------
>
> Key: WICKET-699
> URL: https://issues.apache.org/jira/browse/WICKET-699
> Project: Wicket
> Issue Type: Improvement
> Components: wicket-examples
> Affects Versions: 1.3.0-beta2
> Reporter: Jean-Baptiste Quenot
> Priority: Minor
> Fix For: 1.3.0-final
>
>
> When loading the captcha example with no graphics display, here is the error
> I get:
> {noformat}
> Caused by: 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.access$000(X11GraphicsEnvironment.java:53)
> at
> sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:142)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:164)
> at
> java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
> at sun.font.FontManager.initSGEnv(FontManager.java:953)
> at sun.font.FontManager.findFont2D(FontManager.java:1115)
> at java.awt.Font.getFont2D(Font.java:358)
> at java.awt.Font.defaultLineMetrics(Font.java:1816)
> at java.awt.Font.getLineMetrics(Font.java:1902)
> at java.awt.font.TextLayout.fastInit(TextLayout.java:679)
> at java.awt.font.TextLayout.<init>(TextLayout.java:480)
> at
> org.apache.wicket.extensions.markup.html.captcha.CaptchaImageResource.<init>(CaptchaImageResource.java:192)
> at
> org.apache.wicket.extensions.markup.html.captcha.CaptchaImageResource.<init>(CaptchaImageResource.java:155)
> at
> org.apache.wicket.examples.captcha.Captcha$CaptchaForm.<init>(Captcha.java:53)
> at org.apache.wicket.examples.captcha.Captcha.<init>(Captcha.java:116)
> {noformat}
> We could intercept this and recover gracefully, to instruct users in the
> wicket example page how to setup the server for making this work.
> Similar issue on images example:
> {noformat}
> java.lang.NoClassDefFoundError
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:164)
> at
> java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
> at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1141)
> at java.awt.image.BufferedImage.getGraphics(BufferedImage.java:1131)
> at org.apache.wicket.examples.images.Home$1.newResource(Home.java:109)
> at org.apache.wicket.ResourceReference.bind(ResourceReference.java:148)
> at
> org.apache.wicket.markup.html.image.resource.LocalizedImageResource.bind(LocalizedImageResource.java:184)
> at
> org.apache.wicket.markup.html.image.resource.LocalizedImageResource.setResourceReference(LocalizedImageResource.java:239)
> at
> org.apache.wicket.markup.html.image.Image.setImageResourceReference(Image.java:177)
> at org.apache.wicket.markup.html.image.Image.(Image.java:101)
> at org.apache.wicket.markup.html.image.Image.(Image.java:76)
> at org.apache.wicket.examples.images.Home.(Home.java:82)
> {noformat}
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