Hi, I am using JDK 8 (and a custom karaf distribution). However it should not be so difficult to reproduce: 1. Install Woodstox on the system (e.g. mvn:org.codehaus.woodstox/stax2-api/3.1.4 and mvn:org.codehaus.woodstox/woodstox-core-asl/4.4.1) (I am aware that these are not the latest version, but that should actually not matter) What does matter is that the woodstox-core-asl bundle contains a directory META-INF/services with files like javax.xml.stream.XMLInputFactory containing the class name of the factory implementation provided by this bundle. 2. set a set of system properties javax.xml.stream.XMLEventFactory=com.ctc.wstx.stax.WstxEventFactory javax.xml.stream.XMLInputFactory=com.ctc.wstx.stax.WstxInputFactory javax.xml.stream.XMLOutputFactory=com.ctc.wstx.stax.WstxOutputFactory when you restart your karaf. The system property and the value should match name and the content of the files in META-INF/services of the woodstox bundle. Note: for the operation of the feature to look up the factory this is not necessary, but if you don't set these properties, the lookup in the next step will just return the JDK implementation of the factory, which might work but is not desired in this case. 3. have another bundle that does not import the Woodstox implementation packages (only javax.xml.stream). Call the static method javax.xml.stream.XMLInputFactory.newFactory() from this bundle. This should give you an instance of the com.ctc.wstx.stax.WstxInputFactory (when woodstox is installed).
Best regards Stephan -----Original Message----- From: Freeman Fang <freeman.f...@gmail.com> Sent: Donnerstag, 6. September 2018 15:44 To: dev@karaf.apache.org Subject: Re: org.apache.karaf.specs.locator on Karaf 4.2.1 Hi Stephan, What’s the JDK version you are using? And could you please tell me the steps to reproduce this error? I want to reproduce it and take a close look. Thanks! －－－－－－－－－－－－－ Freeman(Yue) Fang Red Hat, Inc. FuseSource is now part of Red Hat > On Sep 6, 2018, at 8:14 PM, Siano, Stephan <stephan.si...@sap.com> wrote: > > Hi, > > with Karaf 4.2.0 Guillaume Nodet introduced some mechanism around the > org.apache.karaf.specs.activator bundle that allowed the lookup of registered > service implementations (like woodstox for the Stax-API) in Karaf 4.2.0. > > With 4.2.1 the jar is gone from the boot classpath (with two commits with > Freeman Fang that say "ensure Karaf can build and run with JDK11/JDK10"). > So with Karaf 4.2.1 the lookup for the Woodstox does not work anymore > (probably because of that). > > Caused by: javax.xml.stream.FactoryConfigurationError: Provider > com.ctc.wstx.stax.WstxInputFactory not found > at javax.xml.stream.$FactoryFinder.newInstance($FactoryFinder.java:97) > at javax.xml.stream.$FactoryFinder.newInstance($FactoryFinder.java:74) > at javax.xml.stream.$FactoryFinder.find($FactoryFinder.java:129) > at javax.xml.stream.$FactoryFinder.find($FactoryFinder.java:106) > at > javax.xml.stream.XMLInputFactory.newInstance(XMLInputFactory.java:52) > at javax.xml.stream.XMLInputFactory.newFactory(XMLInputFactory.java:57) > at ... > ... 1 common frames omitted > Caused by: java.lang.ClassNotFoundException: > com/ctc/wstx/stax/WstxInputFactory > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forNameFW(Class.java:357) > at java.lang.Class.forName(Class.java:350) > at > javax.xml.stream.$FactoryFinder.getProviderClass($FactoryFinder.java:64) > at javax.xml.stream.$FactoryFinder.newInstance($FactoryFinder.java:87) > ... 12 common frames omitted > > > Was that bundle removed on purpose from the boot classpath, or was this just > an accident? Other bundles related to this are still there (except > org.apache.karaf.specs.java.xml.ws which was removed from the lib/endorsed > directory). > > Best regards > Stephan
