Re: com/hp/hpl/jena/shared/PrefixMapping$IllegalPrefixException

[Andy Seaborne]

On 28/07/14 16:36, Carmen Manzulli wrote:

ok....i'm using giraph 1.1.0, hadoop 1.2.1  jena arq 2.12.0 and
com.hp.hpl.jena 2.8.8; I've introduced the last one because there were
class not found exceptions for query and queryfactory....i make use of
these two classes to implement a simple select  and just for the moment i'm
using select* as query string to test the code!

jena arq 2.12.0 and jena-core 2.8.8 don't mix.

Use a consistent cut of jena.

        Andy

2014-07-28 16:43 GMT+02:00 Andy Seaborne <a...@apache.org>:

On 28/07/14 15:00, Carmen Manzulli wrote:

Hi experts,

i'm trying to use some jena classes (as Query and QueryFactory) in a
project  but when i run my code i get:

   java.lang.NoClassDefFoundError:
com/hp/hpl/jena/shared/PrefixMapping$IllegalPrefixException
         at com.hp.hpl.jena.query.QueryFactory.create(
QueryFactory.java:68)
         at com.hp.hpl.jena.query.QueryFactory.create(
QueryFactory.java:40)
         at com.hp.hpl.jena.query.QueryFactory.create(
QueryFactory.java:28)
         at sisinflab.Query2.compute(Query2.java:27)

and also :

java.lang.ClassNotFoundException:
com.hp.hpl.jena.shared.PrefixMapping$IllegalPrefixException
         at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
         at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
         at java.security.AccessController.doPrivileged(Native Method)
         at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
         ... 12 more

who can help me?

"NoClassDefFoundError" means it was there are compile time (of Jena) and
not at runtime (of your code).

You have an incomplete or incompatible set of jars files.

         Andy

PS Please could you include things like version numbers (needed for line
numbers to mean anything), the query in question, etc when describing
something.