所以我想将我的项目从Spring Boot 1.1.9.RELEASE升级到1.2.1.RELEASE。

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-websocket</artifactId>
        <version>${spring.boot.version}</version>
    </dependency>

但是，在启动时，我获得了：

Exception in thread "Thread-0" org.springframework.context.ApplicationContextException: Failed to start bean 'subProtocolWebSocketHandler'; nested exception is java.lang.IllegalArgumentException: No handlers
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:176)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
        at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
        at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)
        at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112)
        at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:770)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:483)
        at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:95)
        at com.springagain.Application.run(Application.java:17)
Caused by: java.lang.IllegalArgumentException: No handlers
        at org.springframework.util.Assert.isTrue(Assert.java:65)
        at org.springframework.web.socket.messaging.SubProtocolWebSocketHandler.start(SubProtocolWebSocketHandler.java:234)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        ... 8 more

这是我的WebSocket配置的外观

@Configuration
@EnableWebSocketMessageBroker
public class WebsocketConfiguration extends
        AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry) {
        registry.enableStompBrokerRelay("/queue/", "/topic/");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        // TODO Auto-generated method stub

    }

}

切换回仅spring-boot-starter-websocket依赖项的1.1.9.RELEASE（并将所有其他spring
boot依赖项保持在1.2.1.RELEASE和spring core保持在4.1.4），该异常消失。

看起来像个错误，但有人可以确认吗？

更新 ：更多上下文-这是来自后端服务器代码-
没有websocket客户端连接到它。目的是通过RabbitMQ发布“有趣的”事件，然后从暴露Websocket端点的前端服务器上的客户端可以使用这些事件。我的前端服务器上的代码通过Socksjs支持添加了端点：

public void registerStompEndpoints(StompEndpointRegistry registry) {
    registry.addEndpoint("/push").withSockJS();
}

从这个角度来看，我的理解根本上是有缺陷的:)，或者Spring在检查始终应该有一个websocket端点时变得过于狂热。