java.lang.NoClassDefFoundError: jakarta/json/JsonException

Hello, I’m trying to use the elasticsearch-java client in a new kotlin spring boot 2.7.0-SNAPSHOT project. As soon as I add the import for JacksonJsonpMapper() I get the following error:

	at com.codinghumans.framework.elasticsearch.ElasticsearchClient.<init>(ElasticsearchClient.kt:21) ~[main/:na]
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[na:na]
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[na:na]
	at kotlin.reflect.jvm.internal.calls.CallerImpl$Constructor.call(CallerImpl.kt:41) ~[kotlin-reflect-1.6.0.jar:1.6.0-release-798(1.6.0)]
	at kotlin.reflect.jvm.internal.KCallableImpl.call(KCallableImpl.kt:108) ~[kotlin-reflect-1.6.0.jar:1.6.0-release-798(1.6.0)]
	at kotlin.reflect.jvm.internal.KCallableImpl.callDefaultMethod$kotlin_reflection(KCallableImpl.kt:159) ~[kotlin-reflect-1.6.0.jar:1.6.0-release-798(1.6.0)]
	at kotlin.reflect.jvm.internal.KCallableImpl.callBy(KCallableImpl.kt:112) ~[kotlin-reflect-1.6.0.jar:1.6.0-release-798(1.6.0)]
	at org.springframework.beans.BeanUtils$KotlinDelegate.instantiateClass(BeanUtils.java:867) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:196) ~[spring-beans-5.3.14.jar:5.3.14]
	... 54 common frames omitted
Caused by: java.lang.ClassNotFoundException: jakarta.json.spi.JsonProvider
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
	... 66 common frames omitted```

This is my build.gradle.kts

```import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
	id("org.springframework.boot") version "2.7.0-SNAPSHOT"
	id("io.spring.dependency-management") version "1.0.11.RELEASE"
	id("org.flywaydb.flyway") version "8.2.0"
	kotlin("jvm") version "1.6.0"
	kotlin("plugin.spring") version "1.6.0"
}

group = "com.codinghumans"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_17

repositories {
	mavenCentral()
	maven { url = uri("https://repo.spring.io/milestone") }
	maven { url = uri("https://repo.spring.io/snapshot") }
}

dependencies {
	implementation("co.elastic.clients:elasticsearch-java:7.16.2")
	implementation("com.fasterxml.jackson.core:jackson-databind:2.13.1")
	implementation("com.ibm.icu:icu4j:70.1")
	implementation("mysql:mysql-connector-java:8.0.27")
	implementation("org.flywaydb:flyway-mysql:8.3.0")

	implementation("org.springframework.boot:spring-boot-starter-web")
	implementation("org.springframework.boot:spring-boot-starter-validation")
	implementation("org.springframework.boot:spring-boot-starter-data-jpa")
	implementation("org.springframework.boot:spring-boot-starter-security")
	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
	implementation("org.jetbrains.kotlin:kotlin-reflect")
	implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")

	testImplementation("org.springframework.boot:spring-boot-starter-test")
	developmentOnly("org.springframework.boot:spring-boot-devtools")
}

tasks.withType<KotlinCompile> {
	kotlinOptions {
		freeCompilerArgs = listOf("-Xjsr305=strict")
		jvmTarget = "17"
	}
}

tasks.withType<Test> {
	useJUnitPlatform()
}

I’m quite new to java, so I’m a bit lost…Any idea what I might be doing wrong?