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java.lang.NoClassDefFoundError: kotlin/KotlinNothingValueException

See original GitHub issue

Hi,

I am trying to use Lingua inside a plain Java maven project and using following maven dependency for that:

<dependency>
                <groupId>com.github.pemistahl</groupId>
                <artifactId>lingua</artifactId>
                <version>1.0.3</version>
</dependency>

Code Sample:

import com.github.pemistahl.lingua.api.Language;
import com.github.pemistahl.lingua.api.LanguageDetector;
import com.github.pemistahl.lingua.api.LanguageDetectorBuilder;

import static com.github.pemistahl.lingua.api.Language.*;

public class Test {
    public static void detect(){
        LanguageDetector detector = LanguageDetectorBuilder.fromLanguages(ENGLISH, FRENCH, GERMAN, SPANISH).build();
        Language language = detector.detectLanguageOf("languages are awesome");
        System.out.println(language);
    }

    public static void main(String[] args) {
        detect();
    }
}

While running I am getting following exception:

Exception in thread "main" java.lang.NoClassDefFoundError: kotlin/KotlinNothingValueException
	at kotlinx.serialization.SerializersKt.serializer(Unknown Source)
	at com.github.pemistahl.lingua.internal.TrainingDataLanguageModel$Companion.fromJson(TrainingDataLanguageModel.kt:150)
	at com.github.pemistahl.lingua.api.LanguageDetector.loadLanguageModel$lingua(LanguageDetector.kt:401)
	at com.github.pemistahl.lingua.api.LanguageDetector$loadLanguageModels$1.invoke(LanguageDetector.kt:407)
	at com.github.pemistahl.lingua.api.LanguageDetector$loadLanguageModels$1.invoke(LanguageDetector.kt:79)
	at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
	at com.github.pemistahl.lingua.api.LanguageDetector.lookUpNgramProbability$lingua(LanguageDetector.kt:390)
	at com.github.pemistahl.lingua.api.LanguageDetector.computeSumOfNgramProbabilities$lingua(LanguageDetector.kt:366)
	at com.github.pemistahl.lingua.api.LanguageDetector.computeLanguageProbabilities$lingua(LanguageDetector.kt:353)
	at com.github.pemistahl.lingua.api.LanguageDetector.computeLanguageConfidenceValues(LanguageDetector.kt:162)
	at com.github.pemistahl.lingua.api.LanguageDetector.detectLanguageOf(LanguageDetector.kt:102)
	at com.tomtom.ssv.apt.ingestion.service.LanguageDetector.detect(LanguageDetector.java:67)
	at com.tomtom.ssv.apt.ingestion.service.LanguageDetector.main(LanguageDetector.java:72)
Caused by: java.lang.ClassNotFoundException: kotlin.KotlinNothingValueException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 13 more

Issue Analytics

State:
Created 3 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

1reaction

pemistahlcommented, Mar 9, 2021

It may be the user’s problem?

I think you are right but it’s not the user’s deliberate fault. The explicitly set Kotlin version in Spring Boot seems to overwrite the implicit Kotlin 1.4 dependency. But the user is not able to know about this because the error message is so unspecific.

I will simply add the explicit dependency to Kotlin 1.4 again in the next Lingua release. This should fix it once and for all. Thanks for your help @ahnqirage. Without you, I would not have found the cause so quickly.

0reactions

pemistahlcommented, Apr 24, 2021

I hope that I’ve fixed this now.

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