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From "Guillaume Sauthier (JIRA)" <j...@apache.org>
Subject [jira] Commented: (FELIX-702) ClassCastException on BundleActivator when deploying bundle with OBR
Date Fri, 29 Aug 2008 08:26:44 GMT

    [ https://issues.apache.org/jira/browse/FELIX-702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12626904#action_12626904

Guillaume Sauthier commented on FELIX-702:

I just have a question to confirm my view of this issue:
What do Felix when 2 version of a given package are available in the class space ?
If a new bundle comes (with no explicit package version requirement), doest it wire it to
the first installed package or does it wire it to the more recent version of the package ?

Seems that the more recent version is currently used, but I would like to know if this is
the rule ...

> ClassCastException on BundleActivator when deploying bundle with OBR
> --------------------------------------------------------------------
>                 Key: FELIX-702
>                 URL: https://issues.apache.org/jira/browse/FELIX-702
>             Project: Felix
>          Issue Type: Bug
>          Components: Bundle Repository (OBR)
>            Reporter: Guillaume Sauthier
> I fall on this issue yesterday.
> I was using a Felix compiled with the org.osgi.framework;version=1.3.0 (OSGi R4.0), compiled
before the R4.1 API were released.
> Then, I updated my working copy of Felix, and I did a mvn install. So I have compiled
the OSGi R4.1 API and placed it in my ~/.m2/repository.xml (thanks to the maven-bundle-plugin).
> Now, what happen on the execution side ?
> I understood (reading some recent mails) that the OBR, if it finds a more recent version
of a package already installed, will install it.
> Nice behavior, but the core packages (I think the ones that comes from the System bundle)
should be excluded from the update list.
> At least, I had a problem with the org.osgi.framework package.
> It is exported in version 1.3.0 from the System bundle, but OBR downloaded a newer bundle
(org.osgi.core:1.2.0) that contains the same package in version 1.4.0.
> It is downloaded as a dependency computed by OBR when installing a classic bundle (no
import requirements on a specific org.osgi.framework version), so the primary installed bundle
ends up to be linked to the org.osgi.core bundle.
> Finally, when Felix try to activate that bundle, it fails with a ClassCastException,
because the BundleActivator interface used by the starting bundle is from the org.osgi.core
ClassLoader and because Felix expects the BundleActivator interfaces that comes from the System
> I know this is really a border case situation, because I updated my felix sources at
the wrong time and I did not relaunch my Felix gateway to use the latest org.osgi.framework
package version. But anyway, the bug/issue is there ...
> Any idea to solve it ?

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