Lucene Character NGram UFE: ClassNotFoundException for IndexableField

[rainbo...@googlemail.com]

Heyho,

I was trying to use the LuceneCharacterNGramUFE. During the experiment, URLClassLoader throws a ClassNotFoundException for the class IndexableField (org/apache/lucene/index/IndexableField).
Sounds like the URL changed.

Is this a known and reproducible issue, or does the Feature Extractor need any particular settings,which I am unaware of? I simply tried to add the Feature extractor to my list of feature extractors.

[Johannes Daxenberger]

Hi,

could be a version conflict. Could you make sure that you don't have different versions of, e.g. Lucene, on the classpath/in your pom?

Best,
Johannes




Am 10.03.16 00:25 schrieb "dkpro-t...@googlegroups.com im Auftrag von rainbow.head6 via dkpro-tc-users" <dkpro-t...@googlegroups.com>:

>--
>You received this message because you are subscribed to the Google Groups "dkpro-tc-users" group.
>To unsubscribe from this group and stop receiving emails from it, send an email to dkpro-tc-user...@googlegroups.com.
>For more options, visit https://groups.google.com/d/optout.

[Marius Hamacher]

Hey,

Do I need to add the dependency for Lucene manually or is DKPro taking care of that? 

> Could you make sure that you don't have different versions of, e.g. Lucene, on the classpath/in your pom? 

I can try (still new to DKPro, eclipse and all that jazz). There are two warnings (non-critical) by eclipse, when inspecting the pom:

    Duplicating managed version 0.7.0 for dkpro-tc-core,
    Duplicating managed version 1.7.0 for de.tudarmstadt.ukp.dkpro.core.stanfordnlp-gpl

Fixing this had no effect on the problem.

Best Regards

Marius

[Richard Eckart de Castilho]

Could be related to the Lucene version on the classpath. See

https://groups.google.com/d/msg/dkpro-tc-dev/YHGvxt1khNY/Fo7-EptsDgAJ

Cheers,

-- Richard

[Marius Hamacher]

> Could be related to the Lucene version on the classpath

Spot on, thanks a lot!

Cheers,

Marius