GraphQL FAIL_ON_EMPTY_BEANS

[oo00spy00oo]

Task List

• Steps to reproduce provided
• Stacktrace (if present) provided
• Example that reproduces the problem uploaded to Github
• Full description of the issue provided (see below)

Expected Behaviour

Is this issue related to configuration?

Actual Behaviour

14:06:15.726 [pool-2-thread-2] ERROR i.m.s.DefaultTaskExceptionHandler - Error invoking scheduled task Error instantiating bean of type [io.micronaut.configuration.graphql.ws.GraphQLWsKeepAlive]: Error serializing object to JSON: No serializer found for class io.micronaut.configuration.graphql.ws.GraphQLWsResponse and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
io.micronaut.context.exceptions.BeanInstantiationException: Error instantiating bean of type [io.micronaut.configuration.graphql.ws.GraphQLWsKeepAlive]: Error serializing object to JSON: No serializer found for class io.micronaut.configuration.graphql.ws.GraphQLWsResponse and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
	at io.micronaut.context.DefaultBeanContext.doCreateBean(DefaultBeanContext.java:1918)
	at io.micronaut.context.DefaultBeanContext.createAndRegisterSingletonInternal(DefaultBeanContext.java:2638)
	at io.micronaut.context.DefaultBeanContext.createAndRegisterSingleton(DefaultBeanContext.java:2624)
	at io.micronaut.context.DefaultBeanContext.getBeanForDefinition(DefaultBeanContext.java:2296)
	at io.micronaut.context.DefaultBeanContext.getBeanInternal(DefaultBeanContext.java:2270)
	at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:716)
	at io.micronaut.scheduling.processor.ScheduledMethodProcessor.lambda$process$5(ScheduledMethodProcessor.java:123)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.lang.Thread.run(Thread.java:834)
	at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:517)
	at com.oracle.svm.core.posix.thread.PosixJavaThreads.pthreadStartRoutine(PosixJavaThreads.java:192)
Caused by: java.lang.RuntimeException: Error serializing object to JSON: No serializer found for class io.micronaut.configuration.graphql.ws.GraphQLWsResponse and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
	at io.micronaut.configuration.graphql.JacksonGraphQLJsonSerializer.serialize(JacksonGraphQLJsonSerializer.java:51)
	at io.micronaut.configuration.graphql.ws.GraphQLWsKeepAlive.<init>(GraphQLWsKeepAlive.java:55)
	at io.micronaut.configuration.graphql.ws.$GraphQLWsKeepAliveDefinition.build(Unknown Source)
	at io.micronaut.context.DefaultBeanContext.doCreateBean(DefaultBeanContext.java:1889)
	... 14 common frames omitted
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class io.micronaut.configuration.graphql.ws.GraphQLWsResponse and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
	at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1277)
	at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:400)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
	at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4407)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3661)
	at io.micronaut.configuration.graphql.JacksonGraphQLJsonSerializer.serialize(JacksonGraphQLJsonSerializer.java:49)
	... 17 common frames omitted

Environment Information

• Operating System: MacOSX 10.15
• Micronaut Version: 2.0.3
• JDK Version: 11

build.gradle

plugins {
    id "com.diffplug.eclipse.apt" version "3.22.0"
    id "groovy"
    id "com.github.johnrengelman.shadow" version "6.0.0"
    id "application"
    id "org.sonarqube" version "3.0"
}

version "0.1"
group "io.example"

repositories {
    mavenCentral()
    jcenter()
}

configurations {
    // for dependencies that are needed for development only
    developmentOnly
}

dependencies {
    compileOnly("org.projectlombok:lombok:$lombokVersion")
    annotationProcessor("org.projectlombok:lombok:$lombokVersion")
    annotationProcessor(platform("io.micronaut:micronaut-bom:$micronautVersion"))
    annotationProcessor("io.micronaut:micronaut-inject-java")
    annotationProcessor("io.micronaut:micronaut-validation")
    annotationProcessor("io.micronaut:micronaut-graal")
    compileOnly(platform("io.micronaut:micronaut-bom:$micronautVersion"))
    compileOnly("org.graalvm.nativeimage:svm")
    implementation(platform("io.micronaut:micronaut-bom:$micronautVersion"))
    implementation("io.micronaut:micronaut-inject")
    implementation("io.micronaut:micronaut-validation")
    implementation("io.micronaut:micronaut-runtime")
    implementation("javax.annotation:javax.annotation-api")
    implementation("io.micronaut:micronaut-http-server-netty")
    implementation("io.micronaut:micronaut-http-client")
    implementation("io.micronaut.flyway:micronaut-flyway")
    implementation("io.micronaut.sql:micronaut-jdbc-hikari")
    implementation("io.micronaut.beanvalidation:micronaut-hibernate-validator")
    implementation("io.micronaut.sql:micronaut-hibernate-jpa")
    implementation("io.micronaut.graphql:micronaut-graphql")
    implementation("io.micronaut.cache:micronaut-cache-caffeine")
    runtimeOnly("ch.qos.logback:logback-classic")
    runtimeOnly("org.postgresql:postgresql")
    implementation("com.graphql-java-kickstart:graphql-java-tools:$graphqlJavaToolsVersion")

    testCompileOnly("org.projectlombok:lombok:$lombokVersion")
    testAnnotationProcessor("org.projectlombok:lombok:$lombokVersion")
    testImplementation(enforcedPlatform("io.micronaut:micronaut-bom:$micronautVersion"))
    testImplementation("io.micronaut:micronaut-inject-groovy")
    testImplementation("org.spockframework:spock-core") {
        exclude group: "org.codehaus.groovy", module: "groovy-all"
    }
    testImplementation("io.micronaut.test:micronaut-test-spock")

    testImplementation(platform("org.testcontainers:testcontainers-bom:1.14.3"))
    testRuntimeOnly("org.testcontainers:postgresql")

    implementation('com.github.javafaker:javafaker:1.0.2')
}

test.classpath += configurations.developmentOnly

mainClassName = "io.passiontech.Application"

// use JUnit 5 platform
test {
    useJUnitPlatform()
}

java {
    sourceCompatibility = JavaVersion.toVersion('11')
    targetCompatibility = JavaVersion.toVersion('11')
}

tasks.withType(JavaCompile) {
    options.encoding = "UTF-8"
    options.compilerArgs.addAll([
        '-parameters',
        // enables incremental compilation
        '-Amicronaut.processing.incremental=true',
        '-Amicronaut.processing.annotations=io.passiontech.*',
        "-Amicronaut.processing.group=$project.group",
        "-Amicronaut.processing.module=$project.name",
    ])
}

shadowJar {
    mergeServiceFiles()
}

tasks.withType(JavaExec) {
    classpath += configurations.developmentOnly
    jvmArgs('-XX:TieredStopAtLevel=1', '-Dcom.sun.management.jmxremote')
    if (gradle.startParameter.continuous) {
        systemProperties(
            'micronaut.io.watch.restart':'true',
            'micronaut.io.watch.enabled':'true',
            "micronaut.io.watch.paths":"src/main"
        )
    }
}

[sanimalp]

Tossing my hat in the ring that I had this error also.

Explicitly disabling GWL over WS does appear to avoid the issue, however.

graphql:
  graphql-ws:
    enabled: false