I recently tried to implement a micro service using spring-boot 2.

Now, whenever I attempt to return an object which contains a `java.time.LocalDateTime` from my REST service, the LocalDateTime get serialized as an array of integers. Like so:

```js
{
  "id": "5bf1425f9f8de267f04b22ad",
  "description": "aaaaaarrrgggghhhhh",
  "timestamp": [
    2018,
    11,
    18,
    11,
    43,
    43,
    889000000
  ],
  "time": 2.25,
  ...
}

```

I have tried configuring the `ObjectMapper` through settings in `application.yml`

```
spring:
  jackson:
    serialization:
      write-dates-as-timestamps: false

```

but doesn't work. I have also tried configuring a new ObjectMapper through a Spring Configuration class, like so:

```java
@Configuration
public class JacksonConfig {
  @Bean
  @Primary
  public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
    final ObjectMapper objectMapper = builder.build();
    objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
    return objectMapper;
  }
}

```

My configuration gets loaded (debugger stops at a breakpoint) - it's just that it does nothing.

I tried adding `jackson` dependencies manually (also for the jsr310 module) to my pom.xml - also without any luck.

```
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
</dependency>

```

For some reason it looks like Spring Boot is ignoring my attempts to anything with the ObjectMapper, and it keeps returning the same result.

Setting log level to DEBUG for `com.fasterxml` in the `application.yml` also yields no output:

```
logging:
  level:
    com.fasterxml: DEBUG

```

I use Spring Boot 2.1.0-RELEASE with Jackson 2.9.7. 

The basic pom file was generated from <https://start.spring.io> My project compiles for and runs on a Java 8 JVM.