IDV Users,
If anyone is running the IDV “headlessly” to generate images (for a Web server,
for example), I’d like to pick your brain!
I’m trying to run IDV v5.2 under Mac OS X v.10.8 (Snow Leopard) to generate GIF
images for a Web server. In particular, I’m trying to use my server’s LDM to
run the IDV automatically when the LDM receives certain weather data via the
IDD. As I understand it, this process occurs “headlessly”--that is, without
requiring or using a local interface (keyboard, monitor, or mouse, though my
server has all three).
My IDV bundle, which is executed through an ISL (IDV scripting language) script
via the IDV installation’s runIDV script, works fine when I execute it on my
server manually (that is, using the server’s keyboard and a Terminal window
directly).
However, when the the LDM triggers the same command when it receives certain
weather data via the IDD, the job fails with a java.awt.HeadlessException
message. The same thing happens when I log onto the server remotely using ssh
and try to run the same job (below).
My server had been running Java v.7 but I upgraded to Java v.8—the results are
the same; it runs X11 (XQuartz v.2.7.7) continuously; and it is continuously
logged onto the account that runs the LDM and IDV. I have X11 Forwarding
enabled.
Some messages from the IDV when I try to execute my GIF-generating bundle
(RadarSummary.xidv) and ISL script when logged onto my server remotely using
ssh:
Fri Sep 18 09:54:41 PDT 2015: Loading bundle: RadarSummary.xidv
3D [dev] 1.6.0-pre9-daily-experimental daily
ERROR: Error loading bundle: RadarSummary.xidv
java.awt.HeadlessException
java.awt.HeadlessException
at javax.media.j3d.VirtualUniverse.<clinit>(VirtualUniverse.java:269)
at javax.media.j3d.Canvas3D.<clinit>(Canvas3D.java:3806)
at visad.java3d.DisplayImplJ3D.initialize(DisplayImplJ3D.java:405)
at visad.java3d.DisplayImplJ3D.<init>(DisplayImplJ3D.java:289)
at visad.java3d.DisplayImplJ3D.<init>(DisplayImplJ3D.java:276)
etc.
Am I going to have to install and run a virtual frame bugger like Xvfb?
Any insight or suggestions that I can get will be welcome—I’ve come up empty in
my attempts to forage among online forums, and the last reference to running
the IDV headlessly was in 2010, for Linux systems.
— Dave
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