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https://issues.apache.org/jira/browse/CAMEL-14561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17036732#comment-17036732
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Claus Ibsen commented on CAMEL-14561:
-------------------------------------
So its JAXBContext that seems to load an implementation that is not an
instanceof JAXBContext and then when it attempts to report this, then it has a
NPE in its own code, because getClassloader returns null.
So its some OSGi classloading hell on Karaf that is causing this.
I wonder if we could generate the ObjectFactory classes instead of using
jaxb.index files and rely on JAXB itself. But its a big change as you would
need to add annotations to refer to the factory classes in the model.
This is also only on JDK8 and Karaf. And JDK8 will become dropped in the future.
For Camel 3.1.0 we can release with a known issue and then see if we can find a
fix for 3.1.1.
> Camel-Blueprint fails on JDK8 with NPE
> --------------------------------------
>
> Key: CAMEL-14561
> URL: https://issues.apache.org/jira/browse/CAMEL-14561
> Project: Camel
> Issue Type: Bug
> Components: camel-blueprint
> Reporter: Andrea Cosentino
> Priority: Major
> Fix For: 3.1.0
>
>
> {code:java}
> 17:59:47.865 ERROR
> [fileinstall-/home/oscerd/playground/apache-karaf-4.2.7/deploy] Unable to
> start container for blueprint bundle
> camel-context.xml/0.0.0org.osgi.service.blueprint.container.ComponentDefinitionException:
> Failed to create the JAXB binder : javax.xml.bind.JAXBException: Provider
> class com.sun.xml.internal.bind.v2.ContextFactory could not be instantiated:
> java.lang.NullPointerException - with linked
> exception:[java.lang.NullPointerException] at
> org.apache.camel.blueprint.handler.CamelNamespaceHandler.parseCamelContextNode(CamelNamespaceHandler.java:252)
> ~[?:?] at
> org.apache.camel.blueprint.handler.CamelNamespaceHandler.parse(CamelNamespaceHandler.java:204)
> ~[?:?] at
> org.apache.aries.blueprint.parser.Parser.parseCustomElement(Parser.java:1369)
> ~[!/:1.10.2] at
> org.apache.aries.blueprint.parser.Parser.loadComponents(Parser.java:427)
> ~[!/:1.10.2] at
> org.apache.aries.blueprint.parser.Parser.populate(Parser.java:331)
> ~[!/:1.10.2] at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:371)
> [!/:1.10.2] at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:298)
> [!/:1.10.2] at
> org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:311)
> [!/:1.10.2] at
> org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:280)
> [!/:1.10.2] at
> org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:276)
> [!/:1.10.2] at
> org.apache.aries.blueprint.container.BlueprintExtender.modifiedBundle(BlueprintExtender.java:266)
> [!/:1.10.2] at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:500)
> [!/:1.10.2] at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:433)
> [!/:1.10.2] at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.track(BundleHookBundleTracker.java:725)
> [!/:1.10.2] at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.bundleChanged(BundleHookBundleTracker.java:463)
> [!/:1.10.2] at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$BundleEventHook.event(BundleHookBundleTracker.java:422)
> [!/:1.10.2] at
> org.apache.felix.framework.util.SecureAction.invokeBundleEventHook(SecureAction.java:1179)
> [org.apache.felix.framework-5.6.12.jar:?] at
> org.apache.felix.framework.EventDispatcher.createWhitelistFromHooks(EventDispatcher.java:730)
> [org.apache.felix.framework-5.6.12.jar:?] at
> org.apache.felix.framework.EventDispatcher.fireBundleEvent(EventDispatcher.java:485)
> [org.apache.felix.framework-5.6.12.jar:?] at
> org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4579)
> [org.apache.felix.framework-5.6.12.jar:?] at
> org.apache.felix.framework.Felix.startBundle(Felix.java:2174)
> [org.apache.felix.framework-5.6.12.jar:?] at
> org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998)
> [org.apache.felix.framework-5.6.12.jar:?] at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1260)
> [!/:3.6.4] at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1233)
> [!/:3.6.4] at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:520)
> [!/:3.6.4] at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:365)
> [!/:3.6.4] at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:316)
> [!/:3.6.4]Caused by: javax.xml.bind.JAXBException: Provider class
> com.sun.xml.internal.bind.v2.ContextFactory could not be instantiated:
> java.lang.NullPointerException at
> javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:202)
> ~[?:1.8.0_201] at
> javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:129)
> ~[?:1.8.0_201] at
> javax.xml.bind.ContextFinder.find(ContextFinder.java:318) ~[?:1.8.0_201]
> at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:478)
> ~[?:1.8.0_201] at
> javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:435) ~[?:1.8.0_201]
> at
> org.apache.camel.impl.DefaultModelJAXBContextFactory.newJAXBContext(DefaultModelJAXBContextFactory.java:38)
> ~[?:?] at
> org.apache.camel.blueprint.handler.CamelNamespaceHandler.getJaxbContext(CamelNamespaceHandler.java:678)
> ~[?:?] at
> org.apache.camel.blueprint.handler.CamelNamespaceHandler.parseCamelContextNode(CamelNamespaceHandler.java:250)
> ~[?:?] ... 26 moreCaused by: java.lang.NullPointerException at
> javax.xml.bind.ContextFinder.handleClassCastException(ContextFinder.java:114)
> ~[?:1.8.0_201] at
> javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:187)
> ~[?:1.8.0_201] at
> javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:129)
> ~[?:1.8.0_201] at
> javax.xml.bind.ContextFinder.find(ContextFinder.java:318) ~[?:1.8.0_201]
> at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:478)
> ~[?:1.8.0_201] at
> javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:435) ~[?:1.8.0_201]
> at
> org.apache.camel.impl.DefaultModelJAXBContextFactory.newJAXBContext(DefaultModelJAXBContextFactory.java:38)
> ~[?:?] at
> org.apache.camel.blueprint.handler.CamelNamespaceHandler.getJaxbContext(CamelNamespaceHandler.java:678)
> ~[?:?] at
> org.apache.camel.blueprint.handler.CamelNamespaceHandler.parseCamelContextNode(CamelNamespaceHandler.java:250)
> ~[?:?] ... 26 more17:59:47.871 DEBUG
> [fileinstall-/home/oscerd/playground/apache-karaf-4.2.7/deploy] Sending
> blueprint container event BlueprintEvent[type=FAILURE, exception=Failed to
> create the JAXB binder : javax.xml.bind.JAXBException: Provider class
> com.sun.xml.internal.bind.v2.ContextFactory could not be instantiated:
> java.lang.NullPointerException
> {code}
> With a simple blueprint.xml. With JDK11 this is ok.
>
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