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RE: [platform-swt-dev] Webstart process fails to terminate (Win32 SWT 3044)
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Just
to follow up, I found the solution (on 1.4.2_04 anyway) to the problem
below.
The
"Unoffical Webstart FAQ" led me to the correct answer (http://lopica.sourceforge.net/index.html),
which is that on the first launch Java WebStart pops up some Swing-based panels
to prompt for certificate acceptance and desktop integration. These popups
don't appear on the second or subsequent launches. Since the Swing threads
got started, all that is needed is to ensure the app exits with a call to
System.exit(), something that was not necessary for my SWT-based UI
when run by itself. I added the System.exit() and now it exits the
javaw.exe process.
SWT
works great via webstart!
-
Jason
Windows 2000 sp4, Sun JRE 1.4.2_04.
Its
not happening now, however (apparently since I switched from JDK 1.5.0).
I even tried not disposing of images, colors, and fonts and its not hanging on
exit any longer.
I'll
post again if I can reproduce it.
Thanks,
-
Jason
Which platform is
this? win32 should clean up automagically but I've seen problems on pocket
pc where the window procs must be terminated explicitly (by correctly
disposing your widgets) or they prevent the vm from shutting down
cleanly.
-Jesse
Steve Northover
<Steve_Northover@xxxxxxxxxx>
Sent by:
platform-swt-dev-admin@xxxxxxxxxxx
05/14/2004 11:00 AM
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| Re:
[platform-swt-dev] Webstart process fails to terminate (Win32
SWT 3044) |
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SWT absolutely does not create any threads on
your behalf. When you exit, resources are automatically reclaimed by
the operating system.
"Jason Sando"
<jsando@xxxxxxxxxxxxxx>
Sent by:
platform-swt-dev-admin@xxxxxxxxxxx
05/14/2004 01:48 PM
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Subject
| [platform-swt-dev]
Webstart process fails to terminate (Win32 SWT
3044) |
|
I'm deploying a SWT
application via webstart. When the application exits,
the webstart
process (javaw.exe) was failing to terminate, such that when I
deployed
an updated version of the application and tried to launch it, it
couldn't
unpack the DLL jarfile, because the old copy of the .dll's were
still in
use.
I used Sleak to find resource disposal problems and found I
wasn't disposing
my images, fonts, and colors, and now I think the
problem has been
corrected.
I also dropped back to Sun JRE
1.4.2_04, whereas I had been testing on Sun
1.5.0.
When I run the
application from the command line I don't have this problem,
the Java
runtime exits normally.
So here's the question: is there a daemon
thread or something that continues
running in SWT until I free up ALL of
my resources? Why would this
application exit when run standalone
but not under Webstart?
Thanks,
-
Jason
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