ClassCastException downloading dependencies

[martinvisser]

Describe the bug
Updated to the latest Spring Cloud Contract 4.3.3 and now I can not use Spring Cloud Contract plugin during the first maven build. Subsequent builds do work. No issues when downgrading back to 4.3.1 for first and subsequent runs.

Initially the build starts fine downloading the needed dependencies for the plugin, but without any additional output the build fails. The subsequent run does download the additional dependencies.

Sample
I can reproduce this by removing downloaded jars in $HOME/.m2/repository/org/springframework/cloud/spring-cloud-contract-*.

The first mvn clean test run fails with the following stack trace:

class org.apache.http.impl.client.BasicAuthCache cannot be cast to class org.apache.http.client.AuthCache (org.apache.http.impl.client.BasicAuthCache is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @34c45dca; org.apache.http.client.AuthCache is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @55c57422)
java.lang.ClassCastException: class org.apache.http.impl.client.BasicAuthCache cannot be cast to class org.apache.http.client.AuthCache (org.apache.http.impl.client.BasicAuthCache is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @34c45dca; org.apache.http.client.AuthCache is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @55c57422)
    at org.eclipse.aether.transport.http.HttpTransporter.<init> (HttpTransporter.java:372)
    at org.eclipse.aether.transport.http.HttpTransporterFactory.newInstance (HttpTransporterFactory.java:95)
    at org.eclipse.aether.internal.impl.DefaultTransporterProvider.newTransporter (DefaultTransporterProvider.java:94)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector.<init> (BasicRepositoryConnector.java:128)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory.newInstance (BasicRepositoryConnectorFactory.java:172)
    at org.eclipse.aether.internal.impl.DefaultRepositoryConnectorProvider.newRepositoryConnector (DefaultRepositoryConnectorProvider.java:122)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads (DefaultArtifactResolver.java:549)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve (DefaultArtifactResolver.java:450)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts (DefaultArtifactResolver.java:261)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact (DefaultArtifactResolver.java:243)
    at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom (DefaultArtifactDescriptorReader.java:243)
    at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor (DefaultArtifactDescriptorReader.java:183)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.resolveCachedArtifactDescriptor (DfDependencyCollector.java:382)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.getArtifactDescriptorResult (DfDependencyCollector.java:368)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.processDependency (DfDependencyCollector.java:218)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.processDependency (DfDependencyCollector.java:156)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.process (DfDependencyCollector.java:138)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.doRecurse (DfDependencyCollector.java:343)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.processDependency (DfDependencyCollector.java:277)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.processDependency (DfDependencyCollector.java:156)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.process (DfDependencyCollector.java:138)
    at org.eclipse.aether.internal.impl.collect.df.DfDependencyCollector.doCollectDependencies (DfDependencyCollector.java:108)
    at org.eclipse.aether.internal.impl.collect.DependencyCollectorDelegate.collectDependencies (DependencyCollectorDelegate.java:222)
    at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.collectDependencies (DefaultDependencyCollector.java:87)
    at org.eclipse.aether.internal.impl.DefaultRepositorySystem.collectDependencies (DefaultRepositorySystem.java:306)
    at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve (DefaultProjectDependenciesResolver.java:151)
    at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies (LifecycleDependencyResolver.java:227)
    at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.resolveProjectDependencies (LifecycleDependencyResolver.java:136)
    at org.apache.maven.lifecycle.internal.MojoExecutor.ensureDependenciesAreResolved (MojoExecutor.java:355)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:314)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:174)
    at org.apache.maven.lifecycle.internal.MojoExecutor.access$000 (MojoExecutor.java:75)
    at org.apache.maven.lifecycle.internal.MojoExecutor$1.run (MojoExecutor.java:162)
    at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute (DefaultMojosExecutionStrategy.java:39)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:159)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:105)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:73)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:53)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:118)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:261)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:919)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:285)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:207)
    at jdk.internal.reflect.DirectMethodHandleAccessor.invoke (DirectMethodHandleAccessor.java:103)
    at java.lang.reflect.Method.invoke (Method.java:580)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:255)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:201)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:361)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:314)

[marcingrzejszczak]

That's not really a reproducer. Can you create a simple project (e.g. from start.spring.io) and try to replicate this?

[martinvisser]

You're right, so here's a small demo repo https://github.com/martinvisser/spring-cloud-contract-demo-2460