java.lang.IllegalStateException: Could not find a valid Docker environment. Please see logs and check configuration

Question

I have a docker image called myImageName:latest, which I use in my application. I want to write an integration test for my application, therefore I want to use the TestContainer package. When I run the following simple test:

@Testcontainers
public class myIntegrationTest{

    @Container
    private GenericContainer container =
    new GenericContainer<>(DockerImageName.parse("myImageName:latest"))
    .withExposedPorts(8080);

    
    @Test
    public void myIntegrationTestName() throws Exception{
        assertTrue(container.isRunning());
    }

}

I get the following error (full stacktrace):

18:30:58.741 [main] ERROR org.testcontainers.dockerclient.DockerClientProviderStrategy - Could not find a valid Docker environment. Please check configuration. Attempted configurations were: 2 18:30:58.746 [main] ERROR org.testcontainers.dockerclient.DockerClientProviderStrategy - UnixSocketClientProviderStrategy: failed with exception NoClassDefFoundError (Could not initialize class org.testcontainers.shaded.com.github.dockerjava.core.DefaultObjectMapperHolder) 18:30:58.747 [main] ERROR org.testcontainers.dockerclient.DockerClientProviderStrategy - As no valid configuration was found, execution cannot continue

java.lang.IllegalStateException: Could not find a valid Docker environment. Please see logs and check configuration at org.testcontainers.dockerclient.DockerClientProviderStrategy.lambda$getFirstValidStrategy$7(DockerClientProviderStrategy.java:215) at java.base/java.util.Optional.orElseThrow(Optional.java:408) at org.testcontainers.dockerclient.DockerClientProviderStrategy.getFirstValidStrategy(DockerClientProviderStrategy.java:207) at org.testcontainers.DockerClientFactory.getOrInitializeStrategy(DockerClientFactory.java:136) at org.testcontainers.DockerClientFactory.client(DockerClientFactory.java:178) at org.testcontainers.LazyDockerClient.getDockerClient(LazyDockerClient.java:14) at org.testcontainers.LazyDockerClient.authConfig(LazyDockerClient.java:12) at org.testcontainers.containers.GenericContainer.start(GenericContainer.java:310) at org.testcontainers.junit.jupiter.TestcontainersExtension$StoreAdapter.start(TestcontainersExtension.java:242) at org.testcontainers.junit.jupiter.TestcontainersExtension$StoreAdapter.access$200(TestcontainersExtension.java:229) at org.testcontainers.junit.jupiter.TestcontainersExtension.lambda$null$4(TestcontainersExtension.java:82) at org.junit.jupiter.engine.execution.ExtensionValuesStore.lambda$getOrComputeIfAbsent$4(ExtensionValuesStore.java:86) at org.junit.jupiter.engine.execution.ExtensionValuesStore$MemoizingSupplier.get(ExtensionValuesStore.java:205) at org.junit.jupiter.engine.execution.ExtensionValuesStore$StoredValue.evaluate(ExtensionValuesStore.java:182) at org.junit.jupiter.engine.execution.ExtensionValuesStore$StoredValue.access$100(ExtensionValuesStore.java:171) at org.junit.jupiter.engine.execution.ExtensionValuesStore.lambda$closeAllStoredCloseableValues$1(ExtensionValuesStore.java:65) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:176) at java.base/java.util.concurrent.ConcurrentHashMap$ValueSpliterator.forEachRemaining(ConcurrentHashMap.java:3605) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at org.junit.jupiter.engine.execution.ExtensionValuesStore.closeAllStoredCloseableValues(ExtensionValuesStore.java:68) at org.junit.jupiter.engine.descriptor.AbstractExtensionContext.close(AbstractExtensionContext.java:74) at org.junit.jupiter.engine.execution.JupiterEngineExecutionContext.close(JupiterEngineExecutionContext.java:53) at org.junit.jupiter.engine.descriptor.JupiterTestDescriptor.cleanUp(JupiterTestDescriptor.java:222) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.cleanUp(TestMethodTestDescriptor.java:148) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.cleanUp(TestMethodTestDescriptor.java:65) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$cleanUp$9(NodeTestTask.java:155) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.cleanUp(NodeTestTask.java:155) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:87) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:84) at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:98) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:40) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:529) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:756) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)

• docker v20.10.5
• junit v5.7
• TestContainer v1.15.3
• jdk v11.0.10

Thank you in advance!

Winebibber

There should be some other previous log messages before that stacktrace, please check them, the reason should be there. – Calefacient

Hi Vitaly, thanks for your comment. I edited the post, added the logs previous to the error. – Winebibber

org.testcontainers.dockerclient.DockerClientProviderStrategy - UnixSocketClientProviderStrategy: failed with exception NoClassDefFoundError (Could not initialize class org.testcontainers.shaded.com.github.dockerjava.core.DefaultObjectMapperHolder – Locular

Do you run docker in WSL ? – Adeliaadelice

Answer 1

I added the following dependency to the pom.xml:

<dependency>
 <groupId>com.fasterxml.jackson.core</groupId>
 <artifactId>jackson-annotations</artifactId>
 <version>2.10.5</version>
</dependency>

This package has the missing class:

DefaultObjectMapperHolder

Winebibber

Answer 2

I got a similar exception when using rancher desktop. To check if docker was running okay I ran

$ docker compose ls
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

With this information, I concluded that there was an issue with the rancher desktop docker environment. On restarting rancher desktop, the error went away.

Plication

Answer 3

I got the same issue. Start the docker desktop application in background.

Daphinedaphna

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center. – Quinque

Answer 4

Looks like you don't have active docker service on the computer. Nobody can serve your docker image

On Linux I start docker using the following command:

systemctl start docker

On Windows or Mac you should probably install and run docker desktop

Cracking

Answer 5

For MacOs, I downloaded docker desktop and ran it. https://docs.docker.com/desktop/install/mac-install/

When I ran the test, it worked fine.

Glebe

As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center. – Quinque