Name: boT120536 Date: 12/15/2000


java version "1.2.2"
Solaris VM (build Solaris_JDK_1.2.2_05a, native threads, sunwjit)

ssh is a secure replacement for telnet and rlogin. Besides that, it can provide
a secure and transparent tunnel for X11, usually called forwarding. ssh does
this by establishing some kind of X11 proxy on the remote system to catch all
X11 communication and transfer it through the secure connection.

This forwarding doesn't work with Swing applications (at least here). Windows
stay empty first and start to fill with some garbage, when you try to hit the
menubar blindly or move the mouse over a toolbar.

Steps to reproduce:

- log remotely into another system (Solaris 2.6 and 8 boxes here) with ssh.
- ensure that the forwarding is active (the $DISPLAY environment variable should
contain someting like rembox:10, where remotebox is the hostname of the distant
machine)
- start a simple application like xterm or dtterm to ensure the forwarding is
working
- start a java application which uses swing, e.g. SwingSet from the Java 1.2
demo from Solaris 8 in /usr/demo/JAVA1.2/demo/jfc/SwingSet
- The progress indicator is still working, but the main app doesn't do. If
you're lucky, you see a part of the menu bar in the upper left corner, otherwise
the windows stays empty. Click into the window randomly to see some action.

AWT seems to work, at least the GraphicsTest demo applet (in
/usr/demo/JAVA1.2/demo/applets/GraphicsTest) does.

If you telnet from the remote system into another system (desktop -> rembox -
anotherbox) and start you swing apps there, they work.
I'm no Swing or Java GUI expert, but I guess the problem is about believing the
ssh proxy to be a local display and trying to use shared memory instead of
socket communications.
(Review ID: 108625)
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