Spring 4 websocket + Tomcat 7.54 async-supported not working

Question

I am creating a sample chat application using the Spring websockets and stomp.js , I am using the tomcat 7.54 but while runing the application I am gettting a async-support

Answer 1

Make sure no other injected component disables async support.

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DETAILS

I learned that Spring comes with asynchronous support by default.

And (remotely related) sync logging configuration may disable async handling for entire service.

Specifically, my logback integration was missing IMPORTANT line:

public EmbeddedServletContainerCustomizer containerCustomizer(
    final String logbackAccessClasspathConfig
) {
    return container -> {
        if (container instanceof TomcatEmbeddedServletContainerFactory) {
            ((TomcatEmbeddedServletContainerFactory) container)
                .addContextCustomizers(context -> {
                    LogbackValve logbackValve = new LogbackValve();
                    logbackValve.setFilename(logbackAccessClasspathConfig);

                    // IMPORTANT:
                    logbackValve.setAsyncSupported(true);

                    context.getPipeline().addValve(logbackValve);
                }
            );
        }
    };
}

Thanks to other answer:

• LogbackValve is configured for synchronous processing by default
• disable the bean that was injecting LogbackAccess
• set the asyncSupported="true" attribute where you configure the valve