ClassCastException during integration spec when listing dependencies

[tschulte]

The following project:

build.gradle:

apply plugin: 'groovy'

repositories {
    mavenCentral()
}

dependencies {
    compile gradleApi()
    compile localGroovy()
    testCompile 'com.netflix.nebula:nebula-test:2.2.1', {
        exclude module: 'groovy-all'
    }
}

src/test/groovy/nebula/TestIntegrationSpec.groovy:

package nebula

import nebula.test.IntegrationSpec
import nebula.test.functional.ExecutionResult

class TestIntegrationSpec extends IntegrationSpec {

    def "can list dependencies"() {
        setup:
        buildFile << """
            apply plugin: 'java'
            repositories {
                mavenCentral()
            }
            dependencies {
                compile 'org.slf4j:slf4j-api:1.7.6'
            }
            sourceSets.main.compileClasspath.each { println it }
        """.stripIndent()

        expect:
        runTasksSuccessfully('build')
    }

}

leads with gradle 2.4-rc-1 and gradle 2.3 to a ClassCastException while executing the test:

org.gradle.api.GradleException: Build aborted because of an internal error.
    at nebula.test.functional.internal.DefaultExecutionResult.rethrowFailure(DefaultExecutionResult.groovy:97)
    at nebula.test.IntegrationSpec.runTasksSuccessfully(IntegrationSpec.groovy:251)
    at nebula.TestIntegrationSpec.can list dependencies(TestIntegrationSpec.groovy:33)
Caused by: org.gradle.internal.exceptions.LocationAwareException: Build file '/home/tobias/tmp/nebula-test/build/test/nebula.TestIntegrationSpec/can-list-dependencies_2/build.gradle' line: 11
A problem occurred evaluating root project 'can-list-dependencies'.
    at org.gradle.initialization.DefaultExceptionAnalyser.transform(DefaultExceptionAnalyser.java:77)
    at org.gradle.initialization.MultipleBuildFailuresExceptionAnalyser.transform(MultipleBuildFailuresExceptionAnalyser.java:47)
    at org.gradle.initialization.StackTraceSanitizingExceptionAnalyser.transform(StackTraceSanitizingExceptionAnalyser.java:30)
    at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:108)
    at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:86)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:90)
    at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:54)
    at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:41)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28)
    at org.gradle.tooling.internal.provider.DaemonBuildActionExecuter.execute(DaemonBuildActionExecuter.java:44)
    at org.gradle.tooling.internal.provider.DaemonBuildActionExecuter.execute(DaemonBuildActionExecuter.java:31)
    at org.gradle.tooling.internal.provider.LoggingBridgingBuildActionExecuter.execute(LoggingBridgingBuildActionExecuter.java:62)
    at org.gradle.tooling.internal.provider.LoggingBridgingBuildActionExecuter.execute(LoggingBridgingBuildActionExecuter.java:34)
    at org.gradle.tooling.internal.provider.ProviderConnection.run(ProviderConnection.java:113)
    at org.gradle.tooling.internal.provider.ProviderConnection.run(ProviderConnection.java:98)
    at org.gradle.tooling.internal.provider.DefaultConnection.getModel(DefaultConnection.java:164)
    at org.gradle.tooling.internal.consumer.connection.CancellableModelBuilderBackedModelProducer.produceModel(CancellableModelBuilderBackedModelProducer.java:58)
    at org.gradle.tooling.internal.consumer.connection.AbstractConsumerConnection.run(AbstractConsumerConnection.java:56)
    at org.gradle.tooling.internal.consumer.DefaultBuildLauncher$1.run(DefaultBuildLauncher.java:82)
    at org.gradle.tooling.internal.consumer.DefaultBuildLauncher$1.run(DefaultBuildLauncher.java:76)
    at org.gradle.tooling.internal.consumer.connection.LazyConsumerActionExecutor.run(LazyConsumerActionExecutor.java:83)
    at org.gradle.tooling.internal.consumer.connection.ProgressLoggingConsumerActionExecutor.run(ProgressLoggingConsumerActionExecutor.java:58)
    at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:55)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
    at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
Caused by: org.gradle.api.GradleScriptException: A problem occurred evaluating root project 'can-list-dependencies'.
    at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:76)
    at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl$1.run(DefaultScriptPluginFactory.java:148)
    at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:156)
    at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:39)
    at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:26)
    at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
    at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
    at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:487)
    at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:85)
    at org.gradle.execution.TaskPathProjectEvaluator.configure(TaskPathProjectEvaluator.java:35)
    at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:33)
    at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:129)
    at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:106)
    ... 22 more
Caused by: org.gradle.api.artifacts.ResolveException: Could not resolve all dependencies for configuration ':compile'.
    at org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration.rethrowFailure(DefaultLenientConfiguration.java:52)
    at org.gradle.api.internal.artifacts.ivyservice.DefaultResolvedConfiguration.rethrowFailure(DefaultResolvedConfiguration.java:36)
    at org.gradle.api.internal.artifacts.ivyservice.SelfResolvingDependencyResolver$FilesAggregatingResolvedConfiguration.rethrowFailure(SelfResolvingDependencyResolver.java:110)
    at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingArtifactDependencyResolver$ErrorHandlingResolvedConfiguration.rethrowFailure(ErrorHandlingArtifactDependencyResolver.java:180)
    at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:467)
    at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getFiles(DefaultConfiguration.java:218)
    at org.gradle.api.internal.file.AbstractFileCollection.iterator(AbstractFileCollection.java:60)
    at build_csrf1zgj8onjumycudf8c6y7x.run(/home/tobias/tmp/nebula-test/build/test/nebula.TestIntegrationSpec/can-list-dependencies_2/build.gradle:11)
    at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:74)
    ... 34 more
Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve org.slf4j:slf4j-api:1.7.6.
Required by:
    :can-list-dependencies:unspecified
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainDependencyResolver.resolve(RepositoryChainDependencyResolver.java:81)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainAdapter.resolve(RepositoryChainAdapter.java:69)
    at org.gradle.api.internal.artifacts.ivyservice.clientmodule.ClientModuleResolver.resolve(ClientModuleResolver.java:44)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$ModuleVersionResolveState.resolve(DependencyGraphBuilder.java:576)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$ModuleVersionResolveState.getMetaData(DependencyGraphBuilder.java:586)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$DependencyEdge.calculateTargetConfigurations(DependencyGraphBuilder.java:271)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$DependencyEdge.attachToTargetConfigurations(DependencyGraphBuilder.java:245)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.traverseGraph(DependencyGraphBuilder.java:155)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.resolveDependencyGraph(DependencyGraphBuilder.java:93)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.resolve(DependencyGraphBuilder.java:83)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultDependencyResolver$1.execute(DefaultDependencyResolver.java:125)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultDependencyResolver$1.execute(DefaultDependencyResolver.java:90)
    at org.gradle.internal.Transformers$4.transform(Transformers.java:137)
    at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:61)
    at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:39)
    at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultDependencyResolver.resolve(DefaultDependencyResolver.java:90)
    at org.gradle.api.internal.artifacts.ivyservice.CacheLockingArtifactDependencyResolver$1.run(CacheLockingArtifactDependencyResolver.java:42)
    at org.gradle.internal.Factories$1.create(Factories.java:22)
    at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:192)
    at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:175)
    at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:106)
    at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.useCache(DefaultCacheFactory.java:187)
    at org.gradle.api.internal.artifacts.ivyservice.DefaultCacheLockingManager.useCache(DefaultCacheLockingManager.java:64)
    at org.gradle.api.internal.artifacts.ivyservice.CacheLockingArtifactDependencyResolver.resolve(CacheLockingArtifactDependencyResolver.java:40)
    at org.gradle.api.internal.artifacts.ivyservice.SelfResolvingDependencyResolver.resolve(SelfResolvingDependencyResolver.java:45)
    at org.gradle.api.internal.artifacts.ivyservice.ShortcircuitEmptyConfigsArtifactDependencyResolver.resolve(ShortcircuitEmptyConfigsArtifactDependencyResolver.java:58)
    at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingArtifactDependencyResolver.resolve(ErrorHandlingArtifactDependencyResolver.java:47)
    at org.gradle.api.internal.artifacts.ivyservice.DefaultConfigurationResolver.resolve(DefaultConfigurationResolver.java:46)
    at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveNow(DefaultConfiguration.java:263)
    at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getResolvedConfiguration(DefaultConfiguration.java:253)
    at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:465)
    ... 38 more
Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve org.slf4j:slf4j-api:1.7.6.
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveComponentMetaData(ErrorHandlingModuleComponentRepository.java:91)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ComponentMetaDataResolveState.process(ComponentMetaDataResolveState.java:66)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ComponentMetaDataResolveState.resolve(ComponentMetaDataResolveState.java:45)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainDependencyResolver.findBestMatch(RepositoryChainDependencyResolver.java:114)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainDependencyResolver.findBestMatch(RepositoryChainDependencyResolver.java:97)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainDependencyResolver.resolve(RepositoryChainDependencyResolver.java:70)
    ... 68 more
Caused by: org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.MetaDataParseException: Could not parse Ivy file file:/home/tobias/.gradle/caches/modules-2/metadata-2.15/descriptors/org.slf4j/slf4j-api/1.7.6/4471c3b2f5ea2d40ffaa8b3948cdbacd/ivy.xml
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser$Parser$1.execute(IvyXmlModuleDescriptorParser.java:494)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser$Parser$1.execute(IvyXmlModuleDescriptorParser.java:486)
    at org.gradle.internal.resource.AbstractExternalResource.withContent(AbstractExternalResource.java:81)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser$Parser.parse(IvyXmlModuleDescriptorParser.java:486)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser.doParseDescriptorWithProvidedParser(IvyXmlModuleDescriptorParser.java:100)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser.doParseDescriptor(IvyXmlModuleDescriptorParser.java:91)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser.doParseDescriptor(IvyXmlModuleDescriptorParser.java:76)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.AbstractModuleDescriptorParser.parseDescriptor(AbstractModuleDescriptorParser.java:44)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.AbstractModuleDescriptorParser.parseMetaData(AbstractModuleDescriptorParser.java:31)
    at org.gradle.api.internal.artifacts.ivyservice.modulecache.ModuleDescriptorStore.parseModuleDescriptorFile(ModuleDescriptorStore.java:68)
    at org.gradle.api.internal.artifacts.ivyservice.modulecache.ModuleDescriptorStore.getModuleDescriptor(ModuleDescriptorStore.java:48)
    at org.gradle.api.internal.artifacts.ivyservice.modulecache.DefaultModuleMetaDataCache.getCachedModuleDescriptor(DefaultModuleMetaDataCache.java:73)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository$LocateInCacheRepositoryAccess.resolveComponentMetaDataFromCache(CachingModuleComponentRepository.java:158)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository$LocateInCacheRepositoryAccess.resolveComponentMetaData(CachingModuleComponentRepository.java:154)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.BaseModuleComponentRepositoryAccess.resolveComponentMetaData(BaseModuleComponentRepositoryAccess.java:42)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.memcache.InMemoryCachedModuleComponentRepository$CachedAccess.resolveComponentMetaData(InMemoryCachedModuleComponentRepository.java:75)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveComponentMetaData(ErrorHandlingModuleComponentRepository.java:89)
    ... 73 more
Caused by: java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser$ParserHelper.newSAXParser(IvyXmlModuleDescriptorParser.java:1223)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser$ParserHelper.parse(IvyXmlModuleDescriptorParser.java:1264)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.IvyXmlModuleDescriptorParser$Parser$1.execute(IvyXmlModuleDescriptorParser.java:492)
    ... 89 more```

[tschulte]

Workaround:

in build.gradle, instead of

compile gradleApi()

use

compile files(gradleApi().resolve().findAll { !it.name.startsWith('xerces') && !it.name.startsWith('xml-apis') })

[szpak]

Working in a fork mode could be an another workaround - see #32.

[tschulte]

Yes, you are right, setting fork = true does also fix this issue for me.

[bmuschko]

I touched up the documentation on the fork property. If you want classloader isolation, go with fork = true.

[tschulte]

But with fork=true, code coverage using jacoco does not work.

[bmuschko]

Correct, that's because the tests run in a different JVM. See #42.