Access to Tomcat server has not been authorized

Question

I have used glassfish server in netbeans, now I changed to tomcat and when I run my web application that I have created in glassfish gives me the error :

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Answer 1

Complementing the other answers - I was adding the user line i.e.

as people said, but I what I was missing was to simply restart tomcat after that.

Don't forget to restart tomcart service or the changes won't take effect.