Running JVM in headless mode on AS400

[spyderman03]

I am trying to run a JFreeChart application on an AS400 system with WebSphere 6, JDK 1.4. I have tried several methods of setting the system to run in headless mode. In the past (on other unix systems) I had no problems simply putting the following line into my code:

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System.setProperty( "java.awt.headless", "true" );

When I try to run the application with this, I just get an error message saying that I am trying to access AWT without setting java.awt.headless=true or os400.awt.native=true. I then tried setting the os400.awt.native property to true, but still no change.

I then took advice from another thread to add the arguement -Djava.awt.headless=true to my JVM properties in Websphere. When trying to restart the application server, I get an error saying:

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Warning: Java property configuration java.awt.headless=true overrides conflicting Java property configuration os400.awt.native=false.
Unable to create Java Virtual Machine.

Has anyone encountered this problem before? Any thoughts or advice would be greatly appreciated.

Spyder

[mhilpert]

I then took advice from another thread to add the arguement -Djava.awt.headless=true to my JVM properties in Websphere. When trying to restart the application server, I get an error saying:

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Warning: Java property configuration java.awt.headless=true overrides conflicting Java property configuration os400.awt.native=false.
Unable to create Java Virtual Machine.

Has anyone encountered this problem before? Any thoughts or advice would be greatly appreciated.

Spyder

What happens if you leave out the property os400.awt.native=false ?

[spyderman03]

I am not actually setting the os400.awt.native property. By setting java.awt.headless=true, the os400.awt.native property should be automatically set to true. I did try manually setting the os400.awt.native property to true once, but that didn't help either.

[bryanross]

I've developed some JSR-168 portlets using jfree charting and when the property java.awt.headless = true, I get the following error: java.lang.VerifyError: org/jfree/chart/renderer/AbstractRenderer 0000 0000

I am running WAS 6.0.2.23 with WebSphere Portal 6.0.1.1 on OS/400 v5r4.

Any ideas are appreciated.

[jvia]

I'm using Webshere 5.1 on OS400 V5R2 and I've encountered the same error message : net.sf.jasperreports.engine.JRRuntimeException: java.lang.VerifyError: org/jfree/chart/renderer/AbstractRenderer 0000 0000.

I've changed JFreeChart jar file from 1.0.9 to 1.0.8a and...it works !