WARN 12000 — [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : Unable to start LiveReload server

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Cause of problem: solution:

problem

0000-00-00 00:00:55.497  WARN 12000 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : Unable to start LiveReload server

reason:

When you use the springboot hot deployment plug-in devtools , and start multiple applications at the same time, the console will report this warning;

The problem is that a port is configured in devtoolsproperties. The default is 35729

       public static class Livereload {
                private boolean enabled = true;

                private int port = 35729;

        ... }

Multiple ports are in conflict, causing the hot deployment plug-in behind to not take effect.

Solution:

Add the following configuration to the application.properties file:

spring. Devtools. Livereload. Port = 35731 (specified port does not duplicate port)