CODEWITHSUNDEEP
javaunixputtyx11-forwarding
Moon
Moon

Reputation: 20002

X11 Frwarding Error while trying to run a Java Utility with GUI

I am trying to run a java utility on a UNIX Server through PuTTY. This JAVA utility launches a GUI. When I run this utility using the following command 

./DAVTree.sh

I get the following Error

    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 java.awt.Frame.<init>(Unknown Source)
    at javax.swing.JFrame.<init>(Unknown Source)
    at com.sas.services.webdav.tools.DAVTree.<init>(DAVTree.java:319)
    at com.sas.services.webdav.tools.DAVTree.main(DAVTree.java:944)

I searched on the internet for the problem its something called X11 Forwarding don't know what that is but I followed the suggestions by googling so I created a new session with PuTTY and under

Connection > SSH > X11 checked yes the Enable X11 Forwarding

enter image description here

Now when I run the utility again the error\exception message has changed it now says.

Exception in thread "main" java.lang.InternalError: Can't connect to X11 window  

server using 'localhost:10.0' as the value of the DISPLAY variable.

at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.access$100(Unknown Source)
at sun.awt.X11GraphicsEnvironment$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Unknown Source)
at java.awt.Window.init(Unknown Source)
at java.awt.Window.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at javax.swing.JFrame.<init>(Unknown Source)
at com.sas.services.webdav.tools.DAVTree.<init>(DAVTree.java:319)
at com.sas.services.webdav.tools.DAVTree.main(DAVTree.java:944)

Now it says that no DISPLAY variables is set. So I try this

export DISPLAY=kcsclm92:7001

kcsclm:7001 would be my server. After this when I run the utility it gives the same error only with the following difference

Exception in thread "main" java.lang.InternalError: Can't connect to X11 window  

server using 'kcsclm92:7001' as the value of the DISPLAY variable.

I was already working in blind after this I have nothing more to try. Please help.

p.s. (for those who know SAS)I have SAS deployment on a UNIX server and I am trying to run the DAVTree Utility.

Upvotes: 0

Views: 2568

Answers (1)

artbristol
artbristol

Reputation: 32407

You need an X "server" running on your local Windows machine. (Yes, the terminology is confusing). Try http://mobaxterm.mobatek.net/

Note, the correct DISPLAY setting will be created by Putty automatically, so don't change it (localhost:10 sounds about right).

Upvotes: 1

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