#112 Headless operation not resolved
Hi,
I've read the FAQ. I know setting headless=true in
catalina_opts works well on my Solaris 8 system.
I unfortunately have a sys admin who is refusing to
set the Tomcat server to headless in order to avoid
unforseen consequences for other servlets.
He insists that adding
System.setProperty("java.awt.headless","true")
to my code will solve my problem.
When I try this, the canonical X11 error goes away, but
I get a message from cewolf that it cannot find a
render like so:
java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at
java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
at
java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1041)
at
java.awt.image.BufferedImage.getGraphics(BufferedImage.java:1031)
at
de.laures.cewolf.util.RenderingHelper.renderException(RenderingHelper.java:64)
at
de.laures.cewolf.CewolfRenderer.logAndRenderException(CewolfRenderer.java:198)
at
de.laures.cewolf.CewolfRenderer.doGet(CewolfRenderer.java:158)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
This is not too surprising, I guess. Its as if the
classloader simply says "Oh, headless! Gotcha. You
won't be needing any of this stuff. No Graphics for you."
I was wondering if there are any cewolf methods or
settings I can specify in the jsp (or my DataProducer)
to modify its Classloader when headless is specified
inside the code like this, rather than from inside
Tomcat's configuration environment?
Thanks,
John
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user_id=805618
Hrm. That's a tough one. The standard fix has been to set
tomcat to headless. Jfreechart is using awt to do most of
the rendering. I would suggest cross posting to the forum on
jfree.org and see what they say. Cewolf is essentially just
wraping their classes so the straight library from jfc would
have the same problems. Please do post back any
suggestions/solutions you get.