Jackson serialization issue when using Micronaut Lambda runtime

[nedelva]

Expected Behavior

In a Micronaut Lambda project serving REST resources, a resource method such as this one should be perfectly valid:

    @Get(value = "{id}", produces = MediaType.APPLICATION_JSON)
    public Optional<ClaimDTO> getClaim(@PathVariable @NonNull final String id,
                                                 HttpHeaders httpHeaders) { //..etc}

In fact, my Micronaut Lambda project using version 4.4.3 builds and runs without issues.

I expect that things stay the same when upgrading the platform to version 4.6.1.

Actual Behaviour

When upgrading to version 4.6.1, the project fails to build. The MicronautLambdaTest that previously passed now fails with a runtime exception:

10:19:14.053 [main] ERROR i.m.http.server.RouteExecutor - Unexpected error occurred: Error encoding object [ClaimDTO(id=1, claimDate=null, circumstances=null)] to JSON: Incompatible types: declared root type ([reference type, class java.util.Optional<com.example.ClaimDTO><[simple type, class com.example.ClaimDTO]>]) vs `com.example.ClaimDTO`
io.micronaut.http.codec.CodecException: Error encoding object [ClaimDTO(id=1, claimDate=null, circumstances=null)] to JSON: Incompatible types: declared root type ([reference type, class java.util.Optional<com.example.ClaimDTO><[simple type, class com.example.ClaimDTO]>]) vs `com.example.ClaimDTO`
at io.micronaut.json.body.JsonMessageHandler.decorateWrite(JsonMessageHandler.java:129)
at io.micronaut.json.body.JsonMessageHandler.writeTo(JsonMessageHandler.java:142)
at io.micronaut.http.netty.body.NettyJsonHandler.writeTo(NettyJsonHandler.java:125)
at io.micronaut.servlet.http.ServletHttpHandler.encodeResponse(ServletHttpHandler.java:520)
at io.micronaut.servlet.http.ServletHttpHandler.onComplete(ServletHttpHandler.java:272)
at io.micronaut.servlet.http.ServletHttpHandler.lambda$service$6(ServletHttpHandler.java:237)
at io.micronaut.core.execution.ImperativeExecutionFlowImpl.onComplete(ImperativeExecutionFlowImpl.java:132)
at io.micronaut.servlet.http.ServletHttpHandler.service(ServletHttpHandler.java:235)
at io.micronaut.servlet.http.ServletHttpHandler.exchange(ServletHttpHandler.java:183)
at io.micronaut.servlet.http.ServletHttpHandler.exchange(ServletHttpHandler.java:173)
at io.micronaut.function.aws.proxy.payload1.ApiGatewayProxyRequestEventFunction.handleRequest(ApiGatewayProxyRequestEventFunction.java:59)
at com.example.HomeControllerForLambdaRuntimeTest.fetch(HomeControllerForLambdaRuntimeTest.java:116)
at com.example.HomeControllerForLambdaRuntimeTest.testGetClaimFound(HomeControllerForLambdaRuntimeTest.java:96)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:766)
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
at io.micronaut.test.extensions.junit5.MicronautJunit5Extension$2.proceed(MicronautJunit5Extension.java:142)
at io.micronaut.test.extensions.AbstractMicronautExtension.interceptEach(AbstractMicronautExtension.java:162)
at io.micronaut.test.extensions.AbstractMicronautExtension.interceptTest(AbstractMicronautExtension.java:119)
at io.micronaut.test.extensions.junit5.MicronautJunit5Extension.interceptTestMethod(MicronautJunit5Extension.java:129)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at io.micronaut.test.extensions.junit5.MicronautJunit5Extension$2.proceed(MicronautJunit5Extension.java:142)
at io.micronaut.test.extensions.AbstractMicronautExtension.interceptEach(AbstractMicronautExtension.java:162)
at io.micronaut.test.extensions.AbstractMicronautExtension.interceptTest(AbstractMicronautExtension.java:119)
at io.micronaut.test.extensions.junit5.MicronautJunit5Extension.interceptTestMethod(MicronautJunit5Extension.java:129)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:147)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:86)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$8(TestMethodTestDescriptor.java:217)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:213)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:138)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:68)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:198)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:169)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:93)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:58)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:141)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:57)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:103)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:85)
at org.junit.platform.launcher.core.DelegatingLauncher.execute(DelegatingLauncher.java:47)
at org.apache.maven.surefire.junitplatform.LazyLauncher.execute(LazyLauncher.java:56)
at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.execute(JUnitPlatformProvider.java:184)
at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:148)
at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:122)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:385)
at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)
at org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:507)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:495)
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Incompatible types: declared root type ([reference type, class java.util.Optional<com.example.ClaimDTO><[simple type, class com.example.ClaimDTO]>]) vs `com.example.ClaimDTO`

Steps To Reproduce

See the sample GitHub project I provided on my page. The README.md file contains more details and observations.

Environment Information

• OS: Windows
• JDK: OpenJDK 17

Example Application

https://github.com/nedelva/awsgateway-jackson-issue

Version

4.6.1

[goeh]

Sounds like the same as this one: micronaut-projects/micronaut-core#11169

[nedelva]

Sounds like the same as this one: micronaut-projects/micronaut-core#11169

Not sure about that.. There are a number of differences between those issues: in this one I am using Jackson (not internal JSON support), the error is different (InvalidDefinitionException vs ClassCastException) but more importantly, this issue occurs for a project using a Lambda runtime (in Netty runtime it does not occur - see my remarks on the README.md file in the sample project)

[nedelva]

The issue is occurring also for all Micronaut 4.5.x versions.