Hi all!

I'm trying to migrate our OSGi application to Java 11. However I cannot get 
pax-web to find the JAXB implementation. Which leads to a exception like 
the one below when it tries to parse a web.xml. I've added `com.sun.*` to 
bootdelegation but oddly enough that doesn't seem to matter. 

I'm using the Apache Servicemix jaxb implementation bundle 
(org.apache.servicemix.bundles.jaxb-runtime) together with the Jakarta API 
bundle (jakarta.xml.bind-api). I've also tried adding a fragment which 
makes the jakarta API bundle import the apache servicemix jaxb 
implementation package (com.sun etc.). That also didn't work.

Can someone tell me what the proper way is to make pax-web recognize the 
JAXB implementation? 

Regards,

Jasper

------8<-----------------------------
[org.ops4j.pax.web.extender.war.internal.parser.WebAppParser] : error 
parsing web.xml
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found 
on module path or classpath.
 - with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory]
    at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:232)
    at javax.xml.bind.ContextFinder.find(ContextFinder.java:351)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:691)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:632)
    at 
org.ops4j.pax.web.extender.war.internal.parser.WebAppParser.parseWebXml(WebAppParser.java:955)
    at 
org.ops4j.pax.web.extender.war.internal.parser.WebAppParser.scanWebFragments(WebAppParser.java:363)
    at 
org.ops4j.pax.web.extender.war.internal.parser.WebAppParser.parse(WebAppParser.java:186)
    at 
org.ops4j.pax.web.extender.war.internal.WebObserver.createExtension(WebObserver.java:145)
    at 
org.ops4j.pax.web.extender.war.internal.Activator.doCreateExtension(Activator.java:82)
    at 
org.ops4j.pax.web.extender.war.internal.extender.AbstractExtender.createExtension(AbstractExtender.java:259)
    at 
org.ops4j.pax.web.extender.war.internal.extender.AbstractExtender.modifiedBundle(AbstractExtender.java:242)
    at 
org.ops4j.pax.web.extender.war.internal.extender.AbstractExtender.addingBundle(AbstractExtender.java:195)
    at 
org.ops4j.pax.web.extender.war.internal.extender.AbstractExtender.addingBundle(AbstractExtender.java:54)
    at 
org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:475)
    at 
org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:420)
    at 
org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)
    at 
org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183)
    at org.osgi.util.tracker.BundleTracker.open(BundleTracker.java:159)
    at 
org.ops4j.pax.web.extender.war.internal.extender.AbstractExtender.startTracking(AbstractExtender.java:154)
    at 
org.ops4j.pax.web.extender.war.internal.Activator.doStart(Activator.java:59)
    at 
org.ops4j.pax.web.extender.war.internal.extender.AbstractExtender.start(AbstractExtender.java:117)
    at 
org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:698)
    at org.apache.felix.framework.Felix.activateBundle(Felix.java:2402)
    at org.apache.felix.framework.Felix.startBundle(Felix.java:2308)
    at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1539)
    at 
org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: 
com.sun.xml.bind.v2.ContextFactory
    at 
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
    at 
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    at 
javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:92)
    at 
javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:125)
    at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:230)
    ... 26 more
------8<-----------------------------

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