Spring boot + Kotlin + MongoDb: Cannot resolve reference to bean 'mongoTemplate' while setting bean property

Question

I am trying to make a simple application using kotlin and spring boot which connects to mongodb and makes some operations there, however I am facing this issues.

If you guys want to see more details, here is the link of the project on git https://github.com/lucassklp/spring-boot-with-kotlin-example

Anyway I'll add the code here to make it simple:

Output log:

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.4.RELEASE)

2020-11-27 10:12:04.583  INFO 5920 --- [  restartedMain] SpringBootWithKotlinExampleApplicationKt : Starting SpringBootWithKotlinExampleApplicationKt on lucas-simass-MacBook-Pro.local with PID 5920 (/Users/lucas-simas/Documents/Git/spring-boot-with-kotlin-example/target/classes started by lucas-simas in /Users/lucas-simas/Documents/Git/spring-boot-with-kotlin-example)
2020-11-27 10:12:04.585  INFO 5920 --- [  restartedMain] SpringBootWithKotlinExampleApplicationKt : No active profile set, falling back to default profiles: default
2020-11-27 10:12:04.637  INFO 5920 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-11-27 10:12:04.637  INFO 5920 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-11-27 10:12:04.700  WARN 5920 --- [kground-preinit] o.s.h.c.j.Jackson2ObjectMapperBuilder    : For Jackson Kotlin classes support please add "com.fasterxml.jackson.module:jackson-module-kotlin" to the classpath
2020-11-27 10:12:05.103  INFO 5920 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2020-11-27 10:12:05.147  INFO 5920 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 40ms. Found 1 MongoDB repository interfaces.
2020-11-27 10:12:05.666  INFO 5920 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-11-27 10:12:05.678  INFO 5920 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-11-27 10:12:05.678  INFO 5920 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.38]
2020-11-27 10:12:05.760  INFO 5920 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-11-27 10:12:05.761  INFO 5920 --- [  restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1124 ms
2020-11-27 10:12:05.939  INFO 5920 --- [  restartedMain] org.mongodb.driver.cluster               : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2020-11-27 10:12:06.020  INFO 5920 --- [localhost:27017] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:1, serverValue:27}] to localhost:27017
2020-11-27 10:12:06.025  INFO 5920 --- [localhost:27017] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=8, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=3012482}
2020-11-27 10:12:06.120  WARN 5920 --- [  restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController' defined in file [/Users/lucas-simas/Documents/Git/spring-boot-with-kotlin-example/target/classes/com/spring/boot/with/kotlin/example/controllers/UserController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServices' defined in file [/Users/lucas-simas/Documents/Git/spring-boot-with-kotlin-example/target/classes/com/spring/boot/with/kotlin/example/services/UserServices.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.spring.boot.with.kotlin.example.repository.UserRepository defined in @EnableMongoRepositories declared on MongoRepositoriesRegistrar.EnableMongoRepositoriesConfiguration: Cannot resolve reference to bean 'mongoTemplate' while setting bean property 'mongoOperations'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mongoTemplate' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mongoTemplate' parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingMongoConverter' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mappingMongoConverter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoMappingContext' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDataConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
2020-11-27 10:12:06.124  INFO 5920 --- [  restartedMain] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2020-11-27 10:12:06.136  INFO 5920 --- [  restartedMain] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-11-27 10:12:06.145 ERROR 5920 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController' defined in file [/Users/lucas-simas/Documents/Git/spring-boot-with-kotlin-example/target/classes/com/spring/boot/with/kotlin/example/controllers/UserController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServices' defined in file [/Users/lucas-simas/Documents/Git/spring-boot-with-kotlin-example/target/classes/com/spring/boot/with/kotlin/example/services/UserServices.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.spring.boot.with.kotlin.example.repository.UserRepository defined in @EnableMongoRepositories declared on MongoRepositoriesRegistrar.EnableMongoRepositoriesConfiguration: Cannot resolve reference to bean 'mongoTemplate' while setting bean property 'mongoOperations'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mongoTemplate' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mongoTemplate' parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingMongoConverter' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mappingMongoConverter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoMappingContext' defined in class path resource 
org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
    at com.spring.boot.with.kotlin.example.SpringBootWithKotlinExampleApplicationKt.main(SpringBootWithKotlinExampleApplication.kt:13) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.3.4.RELEASE.jar:2.3.4.RELEASE]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServices' defined in file [/Users/lucas-simas/Documents/Git/spring-boot-with-kotlin-example/target/classes/com/spring/boot/with/kotlin/example/services/UserServices.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.spring.boot.with.kotlin.example.repository.UserRepository defined in @EnableMongoRepositories declared on MongoRepositoriesRegistrar.EnableMongoRepositoriesConfiguration: Cannot resolve reference to bean 'mongoTemplate' while setting bean property 'mongoOperations'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mongoTemplate' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mongoTemplate' parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingMongoConverter' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mappingMongoConverter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoMappingContext' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDataConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:797) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:227) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1356) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1203) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1307) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1227) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:884) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:788) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    ... 25 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.spring.boot.with.kotlin.example.repository.UserRepository defined in @EnableMongoRepositories declared on MongoRepositoriesRegistrar.EnableMongoRepositoriesConfiguration: Cannot resolve reference to bean 'mongoTemplate' while setting bean property 'mongoOperations'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mongoTemplate' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mongoTemplate' parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingMongoConverter' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mappingMongoConverter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoMappingContext' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDataConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:342) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:113) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1697) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1442) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1307) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1227) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:884) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:788) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
    ... 39 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mongoTemplate' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mongoTemplate' parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingMongoConverter' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mappingMongoConverter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoMappingContext' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDataConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: 
...

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingMongoConverter' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDatabaseFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'mappingMongoConverter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoMappingContext' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDataConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
...
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoMappingContext' defined in class path resource [org/springframework/boot/autoconfigure/data/mongo/MongoDataConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
...
org.springframework.data.mapping.model.PreferredConstructorDiscoverer$Discoverers$2.lambda$discover$3(PreferredConstructorDiscoverer.java:163) ~[spring-data-commons-2.3.4.RELEASE.jar:2.3.4.RELEASE]

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <kotlin.version>1.4.10</kotlin.version>
        <java.version>8</java.version>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger2 -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>3.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.jetbrains.kotlinx</groupId>
            <artifactId>kotlinx-coroutines-core</artifactId>
            <version>1.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
            <version>2.4.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jdk8</artifactId>
            <version>${kotlin.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-test</artifactId>
            <version>${kotlin.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <sourceDirectory>src/main/kotlin</sourceDirectory>
        <testSourceDirectory>src/test/kotlin</testSourceDirectory>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.jetbrains.kotlin</groupId>
                <artifactId>kotlin-maven-plugin</artifactId>
                <version>${kotlin.version}</version>
                <executions>
                    <execution>
                        <id>compile</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>test-compile</id>
                        <phase>test-compile</phase>
                        <goals>
                            <goal>test-compile</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <jvmTarget>1.8</jvmTarget>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

UserController.kt

@RestController
@RequestMapping("/api/user")
class UserController constructor(val services: UserServices) {

    private val LOGGER: Logger = LoggerFactory.getLogger(UserController::class.java)

    @ApiOperation(value = "Get users")
    @GetMapping
    fun getUsers(): Page<User> = services.listAll(Pageable.unpaged())
}

UserServices.kt

@Service
class UserServices constructor(private val repository: UserRepository){
    fun listAll(pageable: Pageable): Page<User> = repository.findAll(pageable)
}

User.kt

@Document
class User constructor(
        @Id
        val id: String,
        val name: String,
        val email: String
)

UserRepository.kt

interface UserRepository : MongoRepository<User, String>{
    override fun findAll(pageable: Pageable): Page<User>
}

application.properties

server.port=8080

spring.data.mongodb.database=example
spring.data.mongodb.host=localhost
spring.data.mongodb.username=root
spring.data.mongodb.password=password
spring.data.mongodb.port=27017

Answer 1

a friend told me that it is a problem with kotlin reflection (see the very last lines of exception).

Check it out: https://kotlinlang.org/docs/reference/reflection.html

My problem was solved by adding this dependency in my pom.xml

    <dependency>
        <groupId>org.jetbrains.kotlin</groupId>
        <artifactId>kotlin-reflect</artifactId>
    </dependency>

Thank you all!

Answer 2

I had the same problem and it was solved by adding these lines to my build.gradle:

dependencies {
    // ...
    implementation "org.jetbrains.kotlin:kotlin-reflect:1.6.21"
}

Read more about reflection in Kotlin.