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Exceptions while running application on headless linux

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# 1  
Old 10-20-2010
Exceptions while running application on headless linux
I want to install executable file(Demo.bin) on vMA4.0 virtual machine using ssh. Same can be installed on all other Linux/Unix box. but when I am trying to run it on vMA,I am getting the following error--

Quote:
$ ssh -X user@vMA_IP
$sudo ./Demo_Linux.bin
/tmp/Demo/jre/bin/java -cp .:/tmp/Demo/lib/dem.jar -Djava.compiler=NONE install.xInstall install ./install/install.cfg /tmp Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(Unknown Source)
at java.awt.Window.<init>(Unknown Source) at java.awt.Frame.<init>(Unknown Source)
at javax.swing.JFrame.<init>(Unknown Source) at install.xinstall<init>(xinstall.java:161)
at install.xinstall.getInstance(xinstall.java:142)
at install.xinstall.main(xinstall.java:1204)
Could you please advise me how to approch this problem and how to resolve it?
Last edited by smartgupta; 10-20-2010 at 10:17 AM..
# 2  
Old 10-21-2010
Well, the error's clear enough: Your server's headless, but the program for some reason demands an X server. If running an X server on the server is impractical, you may be able to forward it to your own PC through SSH forwarding or allowing it to access it over the internet i.e. export DISPLAY=my.ip.address:0.0
# 3  
Old 10-21-2010
When I am trying it by forwarding it by export DISPLAY:my.ip.address:0.0, I am getting following error--

Quote:
Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/Demo/jre/lib/i386/xawt/libmawt.so: libXext.so.6: cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.load0(Unknown Source)
at java.lang.System.load(Unknown Source)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at sun.security.action.LoadLibraryAction.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.NativeLibLoader.loadLibraries(NativeLibLoader.java:38)
at sun.awt.DebugHelper.<clinit>(Unknown Source)
at java.awt.Component.<clinit>(Unknown Source)
Please provide your valuable suggestions.
# 4  
Old 10-26-2010
Install libXext, I suppose.
# 5  
Old 10-26-2010
Every X11 client, which includes Java's AWT, requires the X11 libraries in order to communicate with the server. So you'll have to install libXext, along with any dependencies that might have.
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