Re: java.awt.HeadlessException on tomcat

Wed, 14 Nov 2007 14:12:16 -0800 

Hi,
Did you look at this explanation : http://java.sun.com/j2se/1.5.0/docs/guide/awt/AWTChanges.html#headless 



For example, Lambda Probe displays some charts and we have to put the 
headless option on the JVM.


Sorry to ask this, but
did you put it right ?
If yes, do you catch the error ?

Lionel


Yann Mauon wrote:

Dear all, 


I have the following problem. I deployed an applicaton on Tomcat and recieve

the following error when I try to display an image generated on the server : 


java.awt.HeadlessException
        at
java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
        at java.awt.Window.<init>(Window.java:406)
        at java.awt.Frame.<init>(Frame.java:402)
        at java.awt.Frame.<init>(Frame.java:367)
        at javax.swing.JFrame.<init>(JFrame.java:163)
        at
com.genebio.toxico.GWT.advancedInfo.server.CDKsdg.SDG2ImageFile(CDKsdg.java:53)
        at
com.genebio.toxico.GWT.advancedInfo.server.CompoundServiceImpl.getImage2D(CompoundServiceImpl.java:132)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:528)
        at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:265)
        at
com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:187)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
        at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)



Previously, I had the 




java.awt.HeadlessException: 
No X11 DISPLAY variable was set, but this program performed an operation

which requires it.
        at
java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
        at java.awt.Window.<init>(Window.java:406)
        at java.awt.Frame.<init>(Frame.java:402)
        at java.awt.Frame.<init>(Frame.java:367)
        at javax.swing.JFrame.<init>(JFrame.java:163)
        at
com.genebio.toxico.GWT.advancedInfo.server.CDKsdg.SDG2ImageFile(CDKsdg.java:53)
        at
com.genebio.toxico.GWT.advancedInfo.server.CompoundServiceImpl.getImage2D(CompoundServiceImpl.java:132)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:528)
        at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:265)
        at
com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:187)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
        at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)



error, but fixed it by adding -Djava.awt.headless=true argument. 


Does someone have an idea to solve this trouble without remove the use of
javax.swing.JFrame ?


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