spring-boot-starter-websocket: java.lang.NoClassDefFoundError: reactor/ipc/netty/options/ClientOptions$Builder

[kamilgregorczyk]

I'm trying to use this dependency:

 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-websocket</artifactId>
    </dependency>

with 2.0.4 spring boot and I'm getting such error related to netty:

org.springframework.context.ApplicationContextException: Failed to start bean 'stompBrokerRelayMessageHandler'; nested exception is java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: reactor/ipc/netty/options/ClientOptions$Builder
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:184) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:52) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:157) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:121) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:885) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:161) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:398) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:330) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1258) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at com.kgregorczyk.springcqrsaxonmonolithexample.SpringCQRSAxonMonolithExampleApplication.main(SpringCQRSAxonMonolithExampleApplication.java:25) [classes/:na]
Caused by: java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: reactor/ipc/netty/options/ClientOptions$Builder
	at org.springframework.messaging.tcp.reactor.ReactorNettyTcpClient.<init>(ReactorNettyTcpClient.java:101) ~[spring-messaging-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler.startInternal(StompBrokerRelayMessageHandler.java:402) ~[spring-messaging-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.messaging.simp.broker.AbstractBrokerMessageHandler.start(AbstractBrokerMessageHandler.java:164) ~[spring-messaging-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	... 14 common frames omitted
Caused by: java.lang.NoClassDefFoundError: reactor/ipc/netty/options/ClientOptions$Builder
	... 18 common frames omitted
Caused by: java.lang.ClassNotFoundException: reactor.ipc.netty.options.ClientOptions$Builder
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_161]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_161]
	... 18 common frames omitted


Process finished with exit code 1

That's how I'm trying to use websockets:

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

  @Override
  public void configureMessageBroker(MessageBrokerRegistry config) {
    config.enableStompBrokerRelay("/topic")
        .setRelayHost("rabbitmq");
    config.setApplicationDestinationPrefixes("/app");
  }

  @Override
  public void registerStompEndpoints(StompEndpointRegistry registry) {
    registry.addEndpoint("/websocket")
        .withSockJS();
  }
}

That's how my pom file looks like:

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.kgregorczyk</groupId>
  <artifactId>spring-cqrs-axon-monolith-example</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>spring-cqrs-axon-monolith-example</name>
  <description>Demo project showing cqrs capabilities</description>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.4.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
      <groupId>org.axonframework</groupId>
      <artifactId>axon-spring-boot-starter</artifactId>
      <version>3.3.2</version>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-amqp</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-websocket</artifactId>
    </dependency>

    <dependency>
      <groupId>io.projectreactor</groupId>
      <artifactId>reactor-net</artifactId>
    </dependency>
    <dependency>
      <groupId>io.netty</groupId>
      <artifactId>netty-all</artifactId>
      <version>4.1.28.Final</version>
    </dependency>

    <dependency>
      <groupId>org.axonframework</groupId>
      <artifactId>axon-mongo</artifactId>
      <version>3.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.axonframework</groupId>
      <artifactId>axon-amqp</artifactId>
      <version>3.3.2</version>
    </dependency>

    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger2</artifactId>
      <version>2.9.2</version>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger-ui</artifactId>
      <version>2.9.2</version>
    </dependency>

    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>


</project>

[kamilgregorczyk]

I did manage to reproduce it in much smaller project, here's a link to that repo: https://github.com/kamilgregorczyk/spring-boot-starter-websocket-error

[snicoll]

@kamilgregorczyk that project doesn't even boot up for me

[ERROR]   The project com.example:demo:0.0.1-SNAPSHOT (/Users/snicoll/Downloads/spring-boot-starter-websocket-error-master/pom.xml) has 1 error
[ERROR]     'dependencies.dependency.version' for io.projectreactor:reactor-net:jar is missing. @ line 38, column 17

reactor-net is an old module name. I've replaced that (and that unnecessary override of Netty) with the following and it works for me

<dependency>
  <groupId>io.projectreactor.ipc</groupId>
  <artifactId>reactor-netty</artifactId>
</dependency>

[kamilgregorczyk]

Thanks! pt., 3 sie 2018, 10:05 użytkownik Stéphane Nicoll <notifications@github.com> napisał:

…

@kamilgregorczyk <https://github.com/kamilgregorczyk> that project doesn't even boot up for me [ERROR] The project com.example:demo:0.0.1-SNAPSHOT (/Users/snicoll/Downloads/spring-boot-starter-websocket-error-master/pom.xml) has 1 error [ERROR] 'dependencies.dependency.version' for io.projectreactor:reactor-net:jar is missing. @ line 38, column 17 reactor-net is an old module name. I've replaced that (and that unnecessary override of Netty) with the following and it works for me <dependency> <groupId>io.projectreactor.ipc</groupId> <artifactId>reactor-netty</artifactId> </dependency> — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#13987 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AI1koBigaGZgeDaeRrIthIwoU8jfGSWGks5uNAQJgaJpZM4VsyXa> .