Hi Nico
You say you upgraded Jena but don't say whether you upgraded ARQ, if you
upgraded to Jena 2.7.0 you would also need to upgrade to ARQ 2.9.0 as
ARQ depends on Jena
If it is the case that you did upgrade both and you're still seeing this
error then it looks more like a Java classpath/runtime problem. The
missing class is part of JMX and JMX should typically be in your JRE but
that may depend on the exact version of Java you are running?
Rob
On 2/17/12 9:24 AM, Nico Schertler wrote:
Hi,
am about to convert an existing OSGi project that uses Jena 2.6.4 to another framework
(from Eclipse Equinox to Apache Felix in combination with BndTools). The old project on
Equinox worked very well, however, I have some trouble with the new framework. In order
to include the Jena libraries into my project, I created a new "Plugin from existing
JAR Archives". I exported that to a deployable Plugin and put that into my local
repository. From there I could add it to my project's build path. It seemed to work well.
It could be compiled, but when I started the project, on the first access to Jena
(createResource) a NoClassDefFoundException on org.xml.sax.SAXException. To solve this
problem, I decided to upgrade the Jena libraries to 2.7 (from a here). So I did the exact
same steps as above. The project, again, could compile and ran a little further. Now, the
createResource-call did not crash and worked very well. However, the project crashed
while performing a SPARQL-Query. Here's an excerpt of the stack trace:
java.lang.NoClassDefFoundError: javax/management/MalformedObjectNameException
at com.hp.hpl.jena.query.ARQ.init(ARQ.java:437)
at com.hp.hpl.jena.query.ARQ.<clinit>(ARQ.java:456)
at com.hp.hpl.jena.query.Query.<clinit>(Query.java:62)
at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:80)
at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:52)
at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:40)
at
com.hp.hpl.jena.query.QueryExecutionFactory.makeQuery(QueryExecutionFactory.java:517)
at
com.hp.hpl.jena.query.QueryExecutionFactory.create(QueryExecutionFactory.java:193)
And, indeed, I was not able to find the definition of this exception in the
Jena libraries. Have I missed anything? Or any other ideas, how to solve this?
Nico
