Why update in class servlet by IDEA after deploy not apply in Tomcat project?
已回答
Hello,
I used Intellij IDEA 2017.1, app server Tomcat 9.0.0.M19 and browser Google Chrome 57.0.2987.133 (64-bit)
I added new line in class servlet and tryeid to deploy new change in Tomcat project.
Procedure finished deploy whithout error.
I see update in folder

but after checked change by browser, I had seen - change not appled.
Why update in class servlet by IDEA after deploy not apply in Tomcat project?
How to solve this problem?
p.s.
deploy settings

settings artifacts

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See https://www.jetbrains.com/idea/help/updating-applications-on-application-servers.html.
Make sure you start in Debug mode. Your Tomcat version also has a bug which prevents proper deployment, it's recommended to use the previous version, see http://stackoverflow.com/a/43378181/104891 for details.
Serge, thank You for your reply.
I understood about bug.
BUT I found other resolve for this problem: in apache tomcat app sever in server.xml added context
I activated parameter reloadable.