java.lang.NoClassDefFoundError: com/google/gson/JsonElement after updating to version 2.3.4.

[brettcooper]

We are using the LaunchDarkly Java client and when upgrading from version 2.3.3 to 2.3.4, the com.google.code.gson dependency is now missing at runtime. We receive the following error when trying to initialize the LDClient:

1) Error injecting constructor, java.lang.NoClassDefFoundError: com/google/gson/JsonElement
at com.unific.aws.config.launchdarkly.LaunchDarklyClientProvider.<init>(LaunchDarklyClientProvider.java:21)
while locating com.unific.aws.config.launchdarkly.LaunchDarklyClientProvider
at com.unific.aws.config.ConfigurationModule.configure(ConfigurationModule.java:21)
while locating com.launchdarkly.client.LDClient
for the 1st parameter of com.unific.aws.config.ConfigurationProvider.<init>(ConfigurationProvider.java:30)
while locating com.unific.aws.config.ConfigurationProvider
at com.unific.aws.config.ConfigurationModule.configure(ConfigurationModule.java:22)
while locating com.unific.aws.config.Configuration
for the 6th parameter of com.unific.graphql.services.CampaignService.<init>(CampaignService.java:68)
while locating com.unific.graphql.services.CampaignService
while locating com.unific.graphql.services.GraphQLService annotated with @com.google.inject.multibindings.Element(setName=,uniqueId=3, type=MULTIBINDER, keyType=)
at com.unific.graphql.guice.GraphQLModule.configure(GraphQLModule.java:60) (via modules: com.unific.graphql.guice.GraphQLModule -> com.google.inject.multibindings.Multibinder$RealMultibinder)
while locating java.util.Set<com.unific.graphql.services.GraphQLService>
for the 1st parameter of com.unific.graphql.guice.GraphQLSchemaProvider.<init>(GraphQLSchemaProvider.java:25)
while locating com.unific.graphql.guice.GraphQLSchemaProvider
at com.unific.graphql.guice.GraphQLModule.configure(GraphQLModule.java:34)
while locating graphql.schema.GraphQLSchema
for the 1st parameter of com.unific.graphql.guice.GraphQLProvider.<init>(GraphQLProvider.java:20)
while locating com.unific.graphql.guice.GraphQLProvider
at com.unific.graphql.guice.GraphQLModule.configure(GraphQLModule.java:35)
while locating graphql.GraphQL
for the 1st parameter of com.unific.graphql.GraphQLExecutor.<init>(GraphQLExecutor.java:22)
at com.unific.graphql.guice.GraphQLModule.configure(GraphQLModule.java:52)
while locating com.unific.graphql.GraphQLExecutor

1 error
at com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:470)
at com.google.inject.internal.InternalInjectorCreator.injectDynamically(InternalInjectorCreator.java:184)
at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:110)
at com.google.inject.Guice.createInjector(Guice.java:99)
at com.google.inject.Guice.createInjector(Guice.java:73)
at com.google.inject.Guice.createInjector(Guice.java:62)
at com.unific.graphql.guice.GraphQLInjector.<clinit>(GraphQLInjector.java:23)
... 5 more
Caused by: java.lang.NoClassDefFoundError: com/google/gson/JsonElement
at com.unific.aws.config.launchdarkly.LaunchDarklyClientProvider.<init>(LaunchDarklyClientProvider.java:26)
at com.unific.aws.config.launchdarkly.LaunchDarklyClientProvider$$FastClassByGuice$$68d9c580.newInstance(<generated>)
at com.google.inject.internal.DefaultConstructionProxyFactory$FastClassProxy.newInstance(DefaultConstructionProxyFactory.java:89)
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:111)
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268)
at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:61)
at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:194)
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38)
at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:110)
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268)
at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:61)
at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:194)
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38)
at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:110)
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268)
at com.google.inject.internal.FactoryProxy.get(FactoryProxy.java:56)
at com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:1019)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1015)
at com.google.inject.multibindings.Multibinder$RealMultibinder.get(Multibinder.java:375)
at com.google.inject.multibindings.Multibinder$RealMultibinder.get(Multibinder.java:258)
at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:81)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:53)
at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:61)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45)
at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38)
at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:110)
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268)
at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:61)
at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:194)
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38)
at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:110)
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268)
at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:61)
at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:194)
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38)
at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:110)
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268)
at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:194)
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
at com.google.inject.internal.InternalInjectorCreator$1.call(InternalInjectorCreator.java:205)
at com.google.inject.internal.InternalInjectorCreator$1.call(InternalInjectorCreator.java:199)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1085)
at com.google.inject.internal.InternalInjectorCreator.loadEagerSingletons(InternalInjectorCreator.java:199)
at com.google.inject.internal.InternalInjectorCreator.injectDynamically(InternalInjectorCreator.java:180)
... 10 more
Caused by: java.lang.ClassNotFoundException: com.google.gson.JsonElement
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 85 more

Also, we tried including the <classifer>all</classifer> within the LaunchDarkly maven dependency config and that broke other dependencies with log4j or slf4j. In the meantime we have rolled back to version 2.3.3 of the LaunchDarkly client.

[pkaeding]

Hi @brettcooper

We removed Gson from the default jar as a result of #103 . It should be pulled in as a dependency, as it is listed with a compile scope in the pom file, though. Can you share your pom file, or at least the parts that reference LaunchDarkly or Gson? If you'd rather not share it publicly on github, you can email [email protected] and we can take it from there.

[brettcooper]

Hi @pkaeding

Thanks for the quick reply! Here is the LaunchDarkly dependency from our project:

        <!-- Feature Hiding -->
        <dependency>
            <groupId>com.launchdarkly</groupId>
            <artifactId>launchdarkly-client</artifactId>
            <!-- Don't upgrade to version 2.3.4 until LaunchDarkly re-includes the gson libarary in their shaded jar -->
            <!-- https://github.com/launchdarkly/java-client/issues/105 -->
            <version>2.3.3</version>
            <!-- added for dependency convergence -->
            <exclusions>
                <!-- com.amazonaws:aws-java-sdk-core specifies joda-time -->
                <exclusion>
                    <groupId>joda-time</groupId>
                    <artifactId>joda-time</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

Here are the references to gson from our parent pom:

<properties>
    <gson.version>2.7</gson.version>
</properties

<dependencyManagement>
    <dependencies>
            <dependency>
                <groupId>com.google.code.gson</groupId>
                <artifactId>gson</artifactId>
                <version>${gson.version}</version>
            </dependency>
    </dependencies>
<dependencyManagement/>

<dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <scope>test</scope>
        </dependency>
</dependency>

Please let me know if this is enough info, or I can email [email protected] with our full pom's. Thanks for your help!

[brettcooper]

Ok, I fixed this now by removing the test scope for gson in our parent pom.

<dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>
</dependency>

Thanks for your help with this issue!