LinkageError when using Clerezza in combination with CXF on Karaf

[Minto van der Sluis]

Hi Folks,

I am using Clerezza in combination with Karaf for approximately a month
now and am quite satisfied this far. Now I am trying to add a CXF based
Rest interface to store triples in our Jena TDB store. The interface
looks something like this:

  @Override
  @POST
  @Path( "/" )
  public void put( String data ) {
      InputStream in = new ByteArrayInputStream( data.getBytes( "UTF-8" ) );
      MGraph graph = new SimpleMGraph();
      getParserService().parse( graph, in, SupportedFormat.RDF_XML ); 
// LinkageError

      ... further processing
  }

When doing this I end up with the following error:

Caused by: java.lang.LinkageError: loader constraint violation: when
resolving method
"org.apache.xerces.util.ParserConfigurationSettings.<init>(Lorg/apache/xerces/xni/parser/XMLComponentManager;)V"
the class loader (instance of
org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) of
the current class, org/apache/xerces/parsers/BasicParserConfiguration,
and the class loader (instance of
org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) for
resolved class, org/apache/xerces/util/ParserConfigurationSettings, have
different Class objects for the type
gs.<init>(Lorg/apache/xerces/xni/parser/XMLComponentManager;)V used in
the signature
    at org.apache.xerces.parsers.BasicParserConfiguration.<init>(Unknown
Source)
    at org.apache.xerces.parsers.DTDConfiguration.<init>(Unknown Source)
    at
org.apache.xerces.parsers.StandardParserConfiguration.<init>(Unknown Source)
    at
org.apache.xerces.parsers.StandardParserConfiguration.<init>(Unknown Source)
    at
com.hp.hpl.jena.rdf.arp.impl.RDFXMLParser.create(RDFXMLParser.java:117)
    at com.hp.hpl.jena.rdf.arp.JenaReader.<init>(JenaReader.java:62)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)[:1.7.0_02]
    at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)[:1.7.0_02]
    at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)[:1.7.0_02]
    at
java.lang.reflect.Constructor.newInstance(Constructor.java:525)[:1.7.0_02]
    at java.lang.Class.newInstance0(Class.java:372)[:1.7.0_02]
    at java.lang.Class.newInstance(Class.java:325)[:1.7.0_02]
    at
com.hp.hpl.jena.rdf.model.impl.RDFReaderFImpl.getReader(RDFReaderFImpl.java:113)
    at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:226)
    at
org.apache.clerezza.rdf.jena.parser.JenaParserProvider.parse(JenaParserProvider.java:68)
    ...

Prior to introducing the Rest interface I have been using a custom Karaf
command to do nearly the same thing. Up until introducing the Rest
interface that command worked without problems. Now it gives this exact
same error.

I suspect there is something wrong with my packaging. But am not sure
what is causing this. Looking up the class in question gives the
following result:

    karaf@root>osgi:find-class XMLComponentManager

    Apache ServiceMix :: Bundles :: saaj-impl (143)
    com/sun/org/apache/xerces/internal/xni/parser/XMLComponentManager.class

    Apache ServiceMix :: Bundles :: xercesImpl (144)
    org/apache/xerces/xni/parser/XMLComponentManager.class

    Clerezza Ext - Jena TDB OSGi Bundle (176)
    org/apache/xerces/xni/parser/XMLComponentManager.class

Unfortunately I am starting to run out of options. Does this look
familiar to anyone here on the list? Any other clues are highly appreciated.

Regards,

Minto van der Sluis