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https://issues.apache.org/jira/browse/FELIX-3696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482427#comment-13482427
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Karl Pauls commented on FELIX-3696:
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Well, I don't see your problem. If we can't support extension bundles because
we don't have an URLClassLoader, we (i.e., this is by design) throw an
UnsupportedOperationException if you try to add an extension bundle. If we gave
you a configuration option it would be exactly the same, no?
If you want to argue that we shouldn't give you an exception in that case, this
is something we can discuss, however, it has nothing to do with the extension
bundle support being enabled or disabled but only with what should we do if an
extension bundle gets installed and we can't support it (be it because
extension bundles are disabled or like it is atm that we don't have an
URLClassLoader).
> Extension Bundle system adds loader to the classloader which can make other
> libraries to fail
> ---------------------------------------------------------------------------------------------
>
> Key: FELIX-3696
> URL: https://issues.apache.org/jira/browse/FELIX-3696
> Project: Felix
> Issue Type: Bug
> Affects Versions: framework-4.0.2
> Reporter: Miguel Ángel Pastor Olivar
>
> I am embedding Apache Felix (and Equinox because I would like to switch
> depending on the application server I am running on).
> * The xalan ExtensionHandler executes something like this:
> ObjectFactory.findProviderClass(className, ObjectFactory.findClassLoader(),
> true)
> * The className has the format
> "java:org.portletbridge.portlet.BridgeFunctions" ( I am embedding the OSGI
> container into Liferay portal :) )
> * The extension manager have already added the extension loader to the
> classloader
> {code}
>
> Felix.m_secureAction.addURLToURLClassLoader(Felix.m_secureAction.createURL(Felix.m_secureAction.createURL(null,
> "http:", extensionManager),"http://felix.extensions:9/";,
> extensionManager),Felix.class.getClassLoader());
> {code}
> * When the classloader try to resolve the
> "java:org.portletbridge.portlet.BridgeFunctions" the previous loader added by
> the ExtensionManager cause an unhandled error.
> In sun.misc.URL
> {code}
> public Resource getResource(String name, boolean check) {
> if (DEBUG) {
> System.err.println("URLClassPath.getResource(\"" + name + "\")");
> }
> Loader loader;
> for (int i = 0; (loader = getLoader(i)) != null; i++) {
> Resource res = loader.getResource(name, check);
> if (res != null) {
> return res;
> }
> }
> return null;
> }
> {code}
> In the previous code, the loader injected by the framework is causing an
> IllegalArgumentException here:
> Resource res = loader.getResource(name, check); (instead of returning null)
> Let me know if you need some more details.
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