Logbook not working with Spring Boot 3.3.x + Webflux

[karolhor]

Logbook does not work with Spring Boot 3.3.4 with webflux/netty dependencies.

Description

I'm trying to integrate logbook with Spring Boot 3.3.x + webflux but it seems not to log requests/responses. I read the documentation and tried to find some working examples on the web, but without success.

Before that I worked with Spring Boot 2.7.x and Logbook 3.7.2, which worked as a charm.
I've prepared a minimal repo with two versions of Spring Boot for testing to reproduce this issue.

Steps to Reproduce

1. Clone repo https://github.com/karolhor/webflux-logbook-example
2. Run application for Spring Boot 3.3.x: mvn spring-boot:run
3. Open page in your browser: http://localhost:8080/api/example
4. Check the logs - there is no request/response data

5. Run application for Spring Boot 2.6.x: mvn -f pom-2.6.xml spring-boot:run
6. Open page in your browser: http://localhost:8080/api/example
7. Check the logs - correct behaviour

Your Environment

• Version used: 3.9.0
• Link to your project: https://github.com/karolhor/webflux-logbook-example

pom.xml
pom-2.6.xml

...
<properties>
  ...
  <logbook.version>3.9.0</logbook.version>
</properties>

<dependencyManagement>
  <dependencies>
    ...
    <dependency>
      <groupId>org.zalando</groupId>
      <artifactId>logbook-bom</artifactId>
      <version>${logbook.version}</version>
      <type>pom</type>
      <scope>import</scope>
      </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
  </dependency>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-webflux</artifactId>
  </dependency>
  <dependency>
    <groupId>org.zalando</groupId>
    <artifactId>logbook-spring-boot-webflux-autoconfigure</artifactId>
  </dependency>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
  </dependency>
  <dependency>
    <groupId>io.projectreactor</groupId>
    <artifactId>reactor-test</artifactId>
    <scope>test</scope>
  </dependency>
</dependencies>
...

application.yml

logging.level:
  com.github.karolhor: TRACE
  org.zalando.logbook: TRACE

logbook:
  write:
    max-body-size: 10000
  obfuscate:
    replacement: "*****"
    headers:
      - Authorization
  format:
    style: http