SimpMessagingTemplate.convertAndSend with RabbitMQ works very slow

Question

I'm using spring STOMP over Websocket with RabbitMQ. All works fine but simpMessagingTemplate.convertAndSend works very slow, call can take 2-10 seconds (synchronously, block thread). What can be a reason??

RabbitTemplate.convertAndSend take < 1s, but I need stomp over websocket..

UPDATE

I try to use ActiveMQ and gets the same result. convertAndSend take 2-10 seconds

ActiveMQ have default configuration.

Web socket config:

@Configuration
@EnableWebSocket
@EnableWebSocketMessageBroker
class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableStompBrokerRelay("/topic", "/queue", "/exchange");
        config.setApplicationDestinationPrefixes("/topic", "/queue"); // prefix in client queries
        config.setUserDestinationPrefix("/user");
    }

    @Override
    void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/board").withSockJS()
    }

    @Override
    void configureWebSocketTransport(WebSocketTransportRegistration registration) {
        registration.setMessageSizeLimit(8 * 1024);
    }
}

which spring version are you using? could you give an example of a message before/after conversion? — Brian Clozel, Feb 24 '17 at 13:07
Too much to ask but could you attempt [this](https://stackoverflow.com/q/55016259/5051731) question of mine? — YetAnotherBot, Mar 06 '19 at 05:47

score 9 · Accepted Answer · answered Feb 24 '17 at 17:20

Problem resolved. Its bug in io.projectreactor library version 2.0.4.RELEASE. I change to 2.0.8.RELEASE and its fixed problem. Sending message now take ~50ms.

    <dependency>
        <groupId>io.projectreactor</groupId>
        <artifactId>reactor-net</artifactId>
        <version>2.0.8.RELEASE</version>
    </dependency>

SimpMessagingTemplate.convertAndSend with RabbitMQ works very slow

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