오류 해결 cvc-id.3: A field of identity constraint 'web-app-servlet- name-uniqueness' matched element 'web-app', but this element does not have a simple type.

문제점

프로젝트 생성시 web.xml에 오류가 발생한다.
cvc-id.3: A field of identity constraint 'web-app-servlet-
name-uniqueness' matched element 'web-app', but this
element does not have a simple type.

해결방법

web.xml 상단

xsi:schemaLocation="http://JAVA.sun.com/xml/ns/javaee https://__java__.sun.com/xml/ns/javaee/web-app_2_5.xsd">
=>
xsi:schemaLocation="http://JAVA.sun.com/xml/ns/javaee https://__JAVA__.sun.com/xml/ns/javaee/web-app_2_5.xsd">

소문자를 대문자로 바꾸면 해결된다.