Setting tomcat connectionUploadTimeout in Spring Boot

Question

I want to try to set the Tomcat connectionUploadTimeout property within Spring Boot 2. I'm getting some random non-reproducible java.net.SocketTimeoutException: null in my server logs.

It's coming from the request input stream, so if I can set this property to a really short duration, then I should be able to replicate it locally.

I've tried

server.disableUploadTimeout=false
server.connectionUploadTimeout=5000

and

server.tomcat.disableUploadTimeout=false
server.tomcat.connectionUploadTimeout=5000

and

server.tomcat.disable-upload-timeout=false
server.tomcat.connection-upload-timeout=5000

but still my 15 seconds requests locally are completing without any time-outs.

The Spring docs are not very helpful here.

Answer 1

There's no need to guess which properties are supported as they're all listed in an appendix in the reference documentation . As you can hopefully see, there are no properties for configuring the connection upload timeout or for enabling the upload timeout on a Connector . This means that those properties must be configured programatically.

You can configure the Connector programmatically using a Tomcat-specific WebServerFactoryCustomizer :

@Bean
public WebServerFactoryCustomizer<TomcatServletWebServerFactory> tomcatCustomizer() {
    return (tomcat) -> tomcat.addConnectorCustomizers((connector) -> {
        if (connector.getProtocolHandler() instanceof AbstractHttp11Protocol) {
            AbstractHttp11Protocol<?> protocolHandler = (AbstractHttp11Protocol<?>) connector
                    .getProtocolHandler();
            protocolHandler.setDisableUploadTimeout(false);
            protocolHandler.setConnectionUploadTimeout(5000);
        }
    });
}