How To Enable Headless Mode

Strict settings of the firewall on a Linux environment may prevent connecting JRE with X11 Window Server. Therefore, the class X11GraphicsEnvironment cannot be initialized:

Example of Possible Errors	Copy Code
INFO \| jvm 1 \| 2013/05/01 19:40:31 \| Exception in thread "Thread-22" java.lang.InternalError: Can't connect to X11 window server using 'localhost:10.0' as the value of the DISPLAY variable. INFO \| jvm 1 \| 2013/05/01 19:41:28 \| Exception in thread "Thread-38" java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment

Example of Possible Errors

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INFO | jvm 1 | 2013/05/01 19:40:31 | Exception in thread "Thread-22" java.lang.InternalError: Can't connect to X11 window server using 'localhost:10.0' as the value of the DISPLAY variable.
INFO | jvm 1 | 2013/05/01 19:41:28 | Exception in thread "Thread-38" java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment

To fix this issue, the headless mode should be enabled in JRE. Headless mode does not require a DISPLAY connection.

To enable this mode, the following line should be added into jrunner-linux-x86-64.properties and jrunner-linux-x86-32.properties:

Example
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jrunner.java.additional.2=-Djava.awt.headless=true
This line should be added right after the line where "jrunner.java.additional.1=..." is defined.

Example	Copy Code
jrunner.java.additional.2=-Djava.awt.headless=true

Restart the Prizm service for the new configuration setting to take effect.