Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

java.lang.NoClassDefFoundError: graphql/schema/DataFetcher

See original GitHub issue

I follow https://www.graphql-java.com/documentation/master/getting-started/ and bump into this error:

Error: Unable to initialize main class com.mycompany.app.App Caused by: java.lang.NoClassDefFoundError: graphql/schema/DataFetcher

Issue Analytics

State:
Created 5 years ago
Comments:5 (2 by maintainers)

Top GitHub Comments

8reactions

bbakermancommented, Nov 7, 2018

Sorry but we cant really help you write a java program via issues on the graphql-java project. Its just too wide a field to say “how do I write a Java program”

I recommend you get yourself a copy of a great IDE like Intellij IDEA or Eclipse and read a bunch of beginner tutorials.

0reactions

bhaskeycommented, May 16, 2022

I started reading the graphql-java tutorial and faced the same error. I haven’t found it out where, but it seems this is because it is SL4J is required somewhere graphql-java, and it has to be in the classpath.

Please feel free to correct me if I am wrong!

Adding sl4j in classpath, solved this for me.

dependencies {
    implementation 'org.slf4j:slf4j-simple:2.0.0-alpha7'
}

Top Results From Across the Web

java.lang.NoClassDefFoundError: graphql/execution ...

The short answer is to upgrade the version of graphql-spring-boot-starter and graphql-java-tools such that they use the same version of graphql- ...

graphql-java-kickstart/Lobby - Gitter

I am still getting this error Caused by: java.lang.ClassNotFoundException: kotlin.coroutines.ContinuationInterceptor. Please help if you have any solution.

Execution - GraphQL Java

schema.PropertyDataFetcher to examine Java POJO objects to provide field values from them. If your don't specify a data fetcher on a field, this...

Spring for GraphQL Documentation

A GraphQL Java application can register a DataFetcherExceptionHandler to decide how to represent exceptions from the data layer in the ...

Schema parser options - GraphQL Java Kickstart

Options: contextClass : If you use a custom context object to execute your queries, let the parser know about it so that it...