Recurring AsyncRequestTimeoutException in Spring Boot Admin log

Question

I'm currently running Spring Boot Admin on my local machine for testing purposes and I'm getting the following error nonstop. The application itself seems to be working fine, but my logs are getting filled with these errors. I'm not sure why...

 org.springframework.web.context.request.async.AsyncRequestTimeoutException: null
    at org.springframework.web.context.request.async.TimeoutDeferredResultProcessingInterceptor.handleTimeout(TimeoutDeferredResultProcessingInterceptor.java:42) ~[spring-web-4.3.3.RELEASE.jar!/:4.3.3.RELEASE]
    at org.springframework.web.context.request.async.DeferredResultInterceptorChain.triggerAfterTimeout(DeferredResultInterceptorChain.java:75) ~[spring-web-4.3.3.RELEASE.jar!/:4.3.3.RELEASE]
    at org.springframework.web.context.request.async.WebAsyncManager$5.run(WebAsyncManager.java:392) ~[spring-web-4.3.3.RELEASE.jar!/:4.3.3.RELEASE]
    at org.springframework.web.context.request.async.StandardServletAsyncWebRequest.onTimeout(StandardServletAsyncWebRequest.java:143) ~[spring-web-4.3.3.RELEASE.jar!/:4.3.3.RELEASE]
    at org.apache.catalina.core.AsyncListenerWrapper.fireOnTimeout(AsyncListenerWrapper.java:44) ~[tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at org.apache.catalina.core.AsyncContextImpl.timeout(AsyncContextImpl.java:131) ~[tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:157) ~[tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at org.apache.coyote.AbstractProcessor.dispatch(AbstractProcessor.java:228) [tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:53) [tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802) [tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410) [tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_40]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_40]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.5.jar!/:8.5.5]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_40]

Answer 1

I also had similar error. try this property in you application.yml

spring:
  mvc:
    async:
      request-timeout: -1  

Answer 2

In case of using ComplatebleFuture<Any> as return type of @RestController function and using Tomcat as backing container.Then is required to register catalina Connector customizer into spring context, which will adjust async connection timeout. Because org.apache.catalina.connector.Connector has its own property protected long asyncTimeout = 30000; which is used as timeout for async request.

@Configuration
class TomcatAsyncConfig {
    @Bean
    fun asyncTimeoutCustomize(): TomcatConnectorCustomizer =
        TomcatConnectorCustomizer { connector -> connector.asyncTimeout = 180000 }
}

Modifing values of spring.mvc.async.request-timeout: -1 or server.tomcat.connection-timeout won't do.

Answer 3

Alternatively without spring boot, add

    @Override
    public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
        long timeout = 5 * 60 * 1000;// for example 5 minutes
        WebMvcConfigurer.super.configureAsyncSupport(configurer);
        configurer.setDefaultTimeout(timeout);
    }

to the configuration class that implements WebMvcConfigurer