Re: [dkpro-user] LuceneNgram causes NoClassDefFoundError after upgrading to dkpro 1.8.0

[Richard Eckart de Castilho]

Hi,

this looks more like a DKPro TC issue. Seems like a version mismatch in the Lucene dependency.
Looks like Maven choses the wrong version. You should be able to fix that by adding an explicit
dependency to Lucene to your project's pom. But I don't know what version TC requires.

@TC people: what version of Lucene does TC need?

Cheers,

-- Richard

> On 07.07.2016, at 10:22, 'Mi Woja' via dkpro-core-user <dkpro-c...@googlegroups.com> wrote:
>
> Dear DKPro-Community,
>
> I am working on dkpro-tc project and upgraded recently to dekpro-core 1.8.0
> However, now I get a ClassNotFoundException when using the LuceneNgram (feature extractors - see stack). Everything else is still working properly. Any advice on that?
>
> thanks in advance,
> Michael
>
> Caused by: java.lang.NoClassDefFoundError: org/apache/lucene/codecs/CompoundFormat
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
> at java.lang.Class.getConstructor0(Class.java:3075)
> at java.lang.Class.newInstance(Class.java:412)
> at org.apache.lucene.util.NamedSPILoader.reload(NamedSPILoader.java:67)
> at org.apache.lucene.util.NamedSPILoader.<init>(NamedSPILoader.java:47)
> at org.apache.lucene.util.NamedSPILoader.<init>(NamedSPILoader.java:37)
> at org.apache.lucene.codecs.Codec.<clinit>(Codec.java:41)
> at org.apache.lucene.index.LiveIndexWriterConfig.<init>(LiveIndexWriterConfig.java:122)
> at org.apache.lucene.index.IndexWriterConfig.<init>(IndexWriterConfig.java:148)
> at org.dkpro.tc.features.ngram.meta.LuceneBasedMetaCollector.initialize(LuceneBasedMetaCollector.java:73)
> at org.dkpro.tc.features.ngram.meta.LuceneNGramMetaCollector.initialize(LuceneNGramMetaCollector.java:61)
> at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initializeAnalysisComponent(PrimitiveAnalysisEngine_impl.java:262)
> at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initialize(PrimitiveAnalysisEngine_impl.java:169)
> at org.apache.uima.impl.AnalysisEngineFactory_impl.produceResource(AnalysisEngineFactory_impl.java:94)
> at org.apache.uima.impl.CompositeResourceFactory_impl.produceResource(CompositeResourceFactory_impl.java:62)
> at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:279)
> at org.apache.uima.UIMAFramework.produceAnalysisEngine(UIMAFramework.java:407)
> at org.apache.uima.analysis_engine.asb.impl.ASB_impl.setup(ASB_impl.java:256)
> at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initASB(AggregateAnalysisEngine_impl.java:429)
> at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initializeAggregateAnalysisEngine(AggregateAnalysisEngine_impl.java:373)
> at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initialize(AggregateAnalysisEngine_impl.java:186)
> at org.dkpro.lab.uima.engine.simple.SimpleExecutionEngine.run(SimpleExecutionEngine.java:121)
> ... 10 more
> Caused by: java.lang.ClassNotFoundException: org.apache.lucene.codecs.CompoundFormat
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> ... 33 more

[Tobias]

We use lucene-core 4.4.0

[Mi Woja]

we solved the issue by explicitly adding the lucene dependency and the dependency of dkpro languagetools (which also introduces some lucenen dependency). We are not sure on why it is working now... but it does :)

thanks everybody for the support
-Michael