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Re: [equinox-dev] Update/uninstall SWT application in Equinox gives UnsatisfiedLinkError

Not sure why my mail bounced. Trying to send again.
Tom


----- Forwarded by Thomas Watson/Austin/IBM on 08/28/2009 08:08 AM -----


From:

Thomas Watson/Austin/IBM

To:

Equinox development mailing list <equinox-dev@xxxxxxxxxxx>

Date:

08/27/2009 08:47 AM

Subject:

RE: [equinox-dev] Update/uninstall SWT application in Equinox gives UnsatisfiedLinkError



Also see https://bugs.eclipse.org/bugs/show_bug.cgi?id=201700

Are you using SWT on top of Equinox or another OSGi Framework implementation? I would not expect issues on Equinox because we should be able to find the SWT libraries without the need of Bundle-NativeCode header. If you are seeing this issue while running on the Equinox framework then please open a bug against RT->Equinox->Framework (https://bugs.eclipse.org/bugs/enter_bug.cgi?product=Equinox) and give steps to reprodice.

Note that you will need a different SWT fragment for each arch/os that you want to run SWT on because each SWT fragment contains the necessary native library for a different platform. Also note that updating bundles with native code is always a dicing situation in OSGi. Java VMs are notoriously bad at unloading native libraries loaded by custom class loaders (such as OSGi). Each time you update such a bundle that has loaded the native code you are likely leaving behind a loaded library in memory that probably will not go away. Eventually you WILL run out of memory.

Tom



Inactive hide details for Vidya Vadke ---08/27/2009 06:47:15 AM---Hi David,Vidya Vadke ---08/27/2009 06:47:15 AM---Hi David,


From:

Vidya Vadke <vidya_vadke@xxxxxxxxxxxxxxxx>

To:

Equinox development mailing list <equinox-dev@xxxxxxxxxxx>

Date:

08/27/2009 06:47 AM

Subject:

RE: [equinox-dev] Update/uninstall SWT application in Equinox gives UnsatisfiedLinkError





Hi David,

Yes, SWT uses native dlls. And my problem is solved by using Bundle-NativeCode.

Thanks,
-Vidya

From: equinox-dev-bounces@xxxxxxxxxxx [mailto:equinox-dev-bounces@xxxxxxxxxxx] On Behalf Of David Conde
Sent:
Thursday, August 27, 2009 2:30 PM
To:
'Equinox development mailing list'
Subject:
RE: [equinox-dev] Update/uninstall SWT application in Equinox gives UnsatisfiedLinkError

Hi,

I do not know if SWT uses native libraries, if it uses then you should include them in Manifest.MF with the Bundle-NativeCode: header, you can also try to fix the java.library.path in the command line with your native library path, when you launch Equinox.

I got a similar Exception because I could not load a native library in Ubuntu.


Regards

David

De: equinox-dev-bounces@xxxxxxxxxxx [mailto:equinox-dev-bounces@xxxxxxxxxxx] En nombre de Vidya Vadke
Enviado el:
jueves, 27 de agosto de 2009 10:50
Para:
equinox-dev@xxxxxxxxxxx
Asunto:
[equinox-dev] Update/uninstall SWT application in Equinox gives UnsatisfiedLinkError


Hi,
I am trying to run an SWT application in OSGi environment. Install/start bundle works fine. But when I update the bundle or try to uninstall-install and start again, I get java.lang.UnsatisfiedLinkError - no swt-win32-3550 in java.library.path.
I have tried putting swt.jar in classpath, extracting swt.jar and putting swt related dlls in windows path, also in jre/bin directory. Still uninstall-install works for the first time. If is try the same once more, it again gives the same error.
Any help towards solving this problem would be appreciated.

Regards,
-Vidya

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