Spring Boot 3.4 is not compatible with Gson 2.10

[liufengvling]

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>3.4.0</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>21</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>
</project>

start Application

@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

}

ERROR:

Exception in thread "main" java.lang.IllegalStateException: java.lang.NoClassDefFoundError: com/google/gson/Strictness
	at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:823)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:328)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350)
	at com.example.demo.DemoApplication.main(DemoApplication.java:10)
Caused by: java.lang.NoClassDefFoundError: com/google/gson/Strictness
	at java.base/java.lang.Class.getDeclaredFields0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredFields(Class.java:3473)
	at java.base/java.lang.Class.getDeclaredField(Class.java:2780)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider$Constructors.isInnerClass(DefaultBindConstructorProvider.java:144)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider$Constructors.getCandidateConstructors(DefaultBindConstructorProvider.java:134)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider$Constructors.getConstructors(DefaultBindConstructorProvider.java:103)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider.getBindConstructor(DefaultBindConstructorProvider.java:55)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBean.deduceBindMethod(ConfigurationPropertiesBean.java:288)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.createBeanDefinition(ConfigurationPropertiesBeanRegistrar.java:94)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.registerBeanDefinition(ConfigurationPropertiesBeanRegistrar.java:88)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.register(ConfigurationPropertiesBeanRegistrar.java:70)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.register(ConfigurationPropertiesBeanRegistrar.java:64)
	at java.base/java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.boot.context.properties.EnableConfigurationPropertiesRegistrar.registerBeanDefinitions(EnableConfigurationPropertiesRegistrar.java:49)
	at org.springframework.context.annotation.ImportBeanDefinitionRegistrar.registerBeanDefinitions(ImportBeanDefinitionRegistrar.java:86)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.lambda$loadBeanDefinitionsFromRegistrars$1(ConfigurationClassBeanDefinitionReader.java:387)
	at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:986)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:386)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:149)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:121)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:430)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:290)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:349)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:118)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:791)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:609)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:318)
	... 3 more
Caused by: java.lang.ClassNotFoundException: com.google.gson.Strictness
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	... 33 more

[bclozel]

Thanks for reaching out. Unfortunately, I cannot reproduce this problem. Can you share a minimal sample application that fails like this? You can share it as a repository on GitHub or simply by attaching a zip to this issue. Thanks!

[liufengvling]

I found it; it was caused by an IDEA plugin. Updating to the latest version of the plugin has resolved the problem.

[bclozel]

Thanks for letting us know.

[juergenschuft]

I found it; it was caused by an IDEA plugin. Updating to the latest version of the plugin has resolved the problem.

hi, as I am facing the same error message, could you please tell me, which IDEA plugin you had to update?

[Na22989]

I found it; it was caused by an IDEA plugin. Updating to the latest version of the plugin has resolved the problem.

hi, as I am facing the same error message, could you please tell me, which IDEA plugin you had to update?

If you are using Spring Boot version 3.4 and Gson version 2.10.1, you can try upgrading the Gson version to 2.11.0.I also encountered this problem, but it was successfully resolved after upgrading to a higher version.

[Wujh577520]

If your IDEA version is relatively new (such as the 2024 version), try unchecking Gradle in the IDEA plugin.

[smcvb]

I came here as result of a build failure I am facing due to dependency upgrades.
I manage a repository that provides Spring AoT support for Axon Framework; we use dependabot to auto-update the dependencies.

After upgrading to Spring Boot 3.4.1, I get the referred-to java.lang.NoClassDefFoundError: com/google/gson/Strictness exception.
However, this occurs during the tests of the repository.

For reference, this is the pull request showing the build errors.
And here's the full stack trace:

java.lang.NoClassDefFoundError: com/google/gson/Strictness

	at java.base/java.lang.Class.getDeclaredFields0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredFields(Class.java:3297)
	at java.base/java.lang.Class.getDeclaredField(Class.java:2608)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider$Constructors.isInnerClass(DefaultBindConstructorProvider.java:144)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider$Constructors.getCandidateConstructors(DefaultBindConstructorProvider.java:134)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider$Constructors.getConstructors(DefaultBindConstructorProvider.java:103)
	at org.springframework.boot.context.properties.bind.DefaultBindConstructorProvider.getBindConstructor(DefaultBindConstructorProvider.java:55)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBean.deduceBindMethod(ConfigurationPropertiesBean.java:288)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.createBeanDefinition(ConfigurationPropertiesBeanRegistrar.java:94)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.registerBeanDefinition(ConfigurationPropertiesBeanRegistrar.java:88)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.register(ConfigurationPropertiesBeanRegistrar.java:70)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBeanRegistrar.register(ConfigurationPropertiesBeanRegistrar.java:64)
	at java.base/java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.boot.context.properties.EnableConfigurationPropertiesRegistrar.registerBeanDefinitions(EnableConfigurationPropertiesRegistrar.java:49)
	at org.springframework.context.annotation.ImportBeanDefinitionRegistrar.registerBeanDefinitions(ImportBeanDefinitionRegistrar.java:86)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.lambda$loadBeanDefinitionsFromRegistrars$1(ConfigurationClassBeanDefinitionReader.java:397)
	at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:396)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:149)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:121)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:430)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:290)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:349)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:118)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:791)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:609)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.configureContext(AbstractApplicationContextRunner.java:456)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.createAndLoadContext(AbstractApplicationContextRunner.java:426)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.lambda$createAssertableContext$4(AbstractApplicationContextRunner.java:411)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.getContextOrStartupFailure(AssertProviderApplicationContextInvocationHandler.java:61)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.<init>(AssertProviderApplicationContextInvocationHandler.java:48)
	at org.springframework.boot.test.context.assertj.ApplicationContextAssertProvider.get(ApplicationContextAssertProvider.java:135)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.createAssertableContext(AbstractApplicationContextRunner.java:411)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.consumeAssertableContext(AbstractApplicationContextRunner.java:384)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.lambda$run$0(AbstractApplicationContextRunner.java:363)
	at org.springframework.boot.test.util.TestPropertyValues.lambda$applyToSystemProperties$1(TestPropertyValues.java:174)
	at org.springframework.boot.test.util.TestPropertyValues.applyToSystemProperties(TestPropertyValues.java:188)
	at org.springframework.boot.test.util.TestPropertyValues.applyToSystemProperties(TestPropertyValues.java:173)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.lambda$run$1(AbstractApplicationContextRunner.java:363)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.withContextClassLoader(AbstractApplicationContextRunner.java:391)
	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.run(AbstractApplicationContextRunner.java:362)
	at org.axonframework.springboot.aot.autoconfig.ResourceInjectorAutoConfigurationTest.defaultResourceInjectorIsPresent(ResourceInjectorAutoConfigurationTest.java:33)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.ClassNotFoundException: com.google.gson.Strictness
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
	... 45 more

If required, I can make a new issue to mark this situation. But, given that the exception as identical, I figured out would be fair to drop a comment here.

Thanks for any and all help given!

[craigmit]

I got the same error due to using GWT, as it's using an old GSON version (2.6.2). However, GWT is now being patched gwtproject/gwt#10079 which should fix it.

[smcvb]

I got the same error due to using GWT, as it's using an old GSON version (2.6.2). However, GWT is now being patched gwtproject/gwt#10079 which should fix it.

Thanks for that, @craigmit!
I also just got a reply on the repository showing the above mentioned behavior from @wilkinsona concerning the same.
Upping the version did the trick; thanks all 🙏

[kwiens12357]

I had same error after upgrade to Spring boot 3.4.1. solved by upgrade of the dependency com.google.code.gson:gson to version 2.11.0

Kind regards.

[wilkinsona]

I wonder if we should change our auto-configuration for Gson so that it backs off in the absence of com.google.gson.Strictness? That would avoid the ClassNotFoundException but could result in a different error or even a silent change in behavior if someone's using Gson.

[wilkinsona]

We're going to treat this as we treated a similar problem with Liquibase. We'll use our own enum instead of com.google.gson.Strictness so the problem will only occur if someone tries to customize things.

[craigmit]

Thank you! 3.4.2 no longer needs the new Gson lib.