René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Null key for a Map not allowed in JSON (use a converting NullKeySerializer?) when using network aliases","articleBody":"This snippet:\r\n```\r\n        DockerClientConfig standard = DefaultDockerClientConfig\r\n            .createDefaultConfigBuilder()\r\n            .build();\r\n\r\n        DockerHttpClient httpClient = new ApacheDockerHttpClient\r\n            .Builder()\r\n            .dockerHost(standard.getDockerHost())\r\n            .sslConfig(standard.getSSLConfig())\r\n            .build();\r\n\r\n        DockerClient dockerClient = DockerClientImpl.getInstance(standard, httpClient);\r\n\r\n        dockerClient.pingCmd().exec();\r\n\r\n        CreateContainerCmd createContainerCmd = dockerClient\r\n            .createContainerCmd(\"nginx:1.23.1\")\r\n            .withAliases(\"test-nginx\");\r\n\r\n        createContainerCmd\r\n            .exec();\r\n```\r\nThrows the following exception:\r\n```\r\ncom.fasterxml.jackson.databind.JsonMappingException: Null key for a Map not allowed in JSON (use a converting NullKeySerializer?) (through reference chain: com.github.dockerjava.core.command.CreateContainerCmdImpl[\"NetworkingConfig\"]-\u003ecom.github.dockerjava.core.command.CreateContainerCmdImpl$NetworkingConfig[\"EndpointsConfig\"]-\u003ejava.util.Collections$SingletonMap[\"null\"])\r\njava.lang.RuntimeException: com.fasterxml.jackson.databind.JsonMappingException: Null key for a Map not allowed in JSON (use a converting NullKeySerializer?) (through reference chain: com.github.dockerjava.core.command.CreateContainerCmdImpl[\"NetworkingConfig\"]-\u003ecom.github.dockerjava.core.command.CreateContainerCmdImpl$NetworkingConfig[\"EndpointsConfig\"]-\u003ejava.util.Collections$SingletonMap[\"null\"])\r\n\tat com.github.dockerjava.core.DefaultInvocationBuilder.encode(DefaultInvocationBuilder.java:294)\r\n\tat com.github.dockerjava.core.DefaultInvocationBuilder.post(DefaultInvocationBuilder.java:121)\r\n\tat com.github.dockerjava.core.exec.CreateContainerCmdExec.execute(CreateContainerCmdExec.java:37)\r\n\tat com.github.dockerjava.core.exec.CreateContainerCmdExec.execute(CreateContainerCmdExec.java:13)\r\n\tat com.github.dockerjava.core.exec.AbstrSyncDockerCmdExec.exec(AbstrSyncDockerCmdExec.java:21)\r\n\tat com.github.dockerjava.core.command.AbstrDockerCmd.exec(AbstrDockerCmd.java:35)\r\n\tat com.github.dockerjava.core.command.CreateContainerCmdImpl.exec(CreateContainerCmdImpl.java:608)\r\n\tat docker.java.bug.AppTest.appHasAGreeting(AppTest.java:44)\r\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\r\n\tat java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\r\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:566)\r\n\tat org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)\r\n\tat org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)\r\n\tat org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)\r\n\tat org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)\r\n\tat org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)\r\n\tat org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)\r\n\tat org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)\r\n\tat org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)\r\n\tat org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)\r\n\tat org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)\r\n\tat org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)\r\n\tat org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)\r\n\tat org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)\r\n\tat org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)\r\n\tat org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:214)\r\n\tat org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)\r\n\tat org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:210)\r\n\tat org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)\r\n\tat org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:66)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)\r\n\tat org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)\r\n\tat org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)\r\n\tat org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)\r\n\tat java.base/java.util.ArrayList.forEach(ArrayList.java:1541)\r\n\tat org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)\r\n\tat org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)\r\n\tat org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)\r\n\tat org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)\r\n\tat java.base/java.util.ArrayList.forEach(ArrayList.java:1541)\r\n\tat org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)\r\n\tat org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)\r\n\tat org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)\r\n\tat org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)\r\n\tat org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)\r\n\tat org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)\r\n\tat org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)\r\n\tat org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)\r\n\tat org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)\r\n\tat org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)\r\n\tat org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)\r\n\tat org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)\r\n\tat org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)\r\n\tat org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)\r\n\tat org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)\r\n\tat org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)\r\n\tat org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)\r\n\tat org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:99)\r\n\tat org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79)\r\n\tat org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75)\r\n\tat org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61)\r\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\r\n\tat java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\r\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:566)\r\n\tat org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)\r\n\tat org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)\r\n\tat org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)\r\n\tat org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)\r\n\tat com.sun.proxy.$Proxy2.stop(Unknown Source)\r\n\tat org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193)\r\n\tat org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)\r\n\tat org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)\r\n\tat org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)\r\n\tat org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)\r\n\tat org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133)\r\n\tat org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71)\r\n\tat worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)\r\n\tat worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)\r\nCaused by: com.fasterxml.jackson.databind.JsonMappingException: Null key for a Map not allowed in JSON (use a converting NullKeySerializer?) (through reference chain: com.github.dockerjava.core.command.CreateContainerCmdImpl[\"NetworkingConfig\"]-\u003ecom.github.dockerjava.core.command.CreateContainerCmdImpl$NetworkingConfig[\"EndpointsConfig\"]-\u003ejava.util.Collections$SingletonMap[\"null\"])\r\n\tat app//com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:288)\r\n\tat app//com.fasterxml.jackson.databind.SerializerProvider.mappingException(SerializerProvider.java:1251)\r\n\tat app//com.fasterxml.jackson.databind.SerializerProvider.reportMappingProblem(SerializerProvider.java:1145)\r\n\tat app//com.fasterxml.jackson.databind.ser.impl.FailingSerializer.serialize(FailingSerializer.java:35)\r\n\tat app//com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.java:705)\r\n\tat app//com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:643)\r\n\tat app//com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:33)\r\n\tat app//com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727)\r\n\tat app//com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:722)\r\n\tat app//com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:166)\r\n\tat app//com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727)\r\n\tat app//com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:722)\r\n\tat app//com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:166)\r\n\tat app//com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)\r\n\tat app//com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)\r\n\tat app//com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:4110)\r\n\tat app//com.fasterxml.jackson.databind.ObjectMapper.writeValueAsBytes(ObjectMapper.java:3437)\r\n\tat app//com.github.dockerjava.core.DefaultInvocationBuilder.encode(DefaultInvocationBuilder.java:292)\r\n\t... 92 more\r\n```\r\n\r\nAnd the container is not created. My feeling is that we shouldn't fail here. `docker create nginx:1.23.1 --network-alias test-nginx` doesn't fail. But I'm not really familiar with the use case - if the usecase is invalid maybe we can throw an exception with a better message.\r\n\r\nRelates to https://github.com/testcontainers/testcontainers-java/issues/5182.","author":{"url":"https://github.com/aidando73","@type":"Person","name":"aidando73"},"datePublished":"2022-09-07T08:28:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/1940/docker-java/issues/1940"}