Spring FAQ

server.jetty.threads.acceptors: -1.0
server.jetty.threads.idle-timeout: 60000ms
server.jetty.threads.max: 200.0
server.jetty.threads.min: 8.0
server.jetty.threads.selectors: -1.0

server.tomcat.threads.max: 200.0
server.tomcat.threads.min-spare: 10.0
server.tomcat.accept-count: 100.0

# https://github.com/undertow-io/undertow/blob/7d87eef9534807d00c974f92dc46be3d09b703a0/core/src/main/java/io/undertow/Undertow.java#L438-L439
server.undertow.threads.io: # Math.max(Runtime.getRuntime().availableProcessors(), 2)
server.undertow.threads.worker: # 8*io threads

spring.cloud.config.allowOverride=true
spring.cloud.config.overrideNone=true
spring.cloud.config.override-system-properties=false

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is org.apache.commons.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. Read timed out
        org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894)
        org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
        org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:312)
        org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
        org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
        org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
        org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
        org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)

<Connector port="8080" protocol="HTTP/1.1" URIEncoding="UTF-8"
           connectionUploadTimeout="36000000" disableUploadTimeout="false"
           connectionTimeout="60000" redirectPort="8443" />

@Bean
public EmbeddedServletContainerCustomizer containerCustomizer() throws FileNotFoundException {
    return factory -> {
        if (factory instanceof TomcatEmbeddedServletContainerFactory) {
            TomcatEmbeddedServletContainerFactory containerFactory = (TomcatEmbeddedServletContainerFactory) factory;
            containerFactory.addConnectorCustomizers(c -> {
                // http://tomcat.apache.org/tomcat-8.0-doc/config/http.html#Standard_Implementation
                log.info("Customize tomcat connector");
                c.setAttribute("connectionUploadTimeout", 36000000);// milliseconds
                c.setAttribute("disableUploadTimeout", false);
            });
        }
    };
}