Jetty logs a warning about an empty context path when using WebFlux

[eungjun-yi]

Jetty warns "Empty contextPath" while my server application, which depends on spring-boot-starter-webflux 2.1.6 and spring-boot-starter-jetty 2.1.6, is starting.

2019-07-02 19:00:40,472 WARN  main (ContextHandler) [-:-] Empty contextPath

It seems that JettyReactiveWebServerFactory sets the context path always to "".

spring-boot/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyReactiveWebServerFactory.java

Line 176 in 4f47b39

ServletContextHandler contextHandler = new ServletContextHandler(server, "", false, false);

So it makes Jetty logs the warning message.

        if (contextPath.length() == 0)
        {
            LOG.warn("Empty contextPath");
            contextPath = "/";
        }

-- https://github.com/eclipse/jetty.project/blob/cf4e7412d440c581bc351de69fee1d00eac1a33e/jetty-server/src/main/java/org/eclipse/jetty/server/handler/ContextHandler.java#L1536-L1540

[eungjun-yi]

I think the context path should be null, "/" or an actual context path from server.sevlect.context-path property.