My application used to work fine during the development. But when it is being deployed environment without internet it started to complain because of spring-security-oauth2 schema location. My complete schema declaration was below.
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:oauth="http://www.springframework.org/schema/security/oauth2"
xmlns:sec="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-4.2.xsd
http://www.springframework.org/schema/security/oauth2
http://www.springframework.org/schema/security/spring-security-oauth2-1.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd">
It worked fine when the internet is available. But without internet, it could not resolve schemalLocation. The error is:
2021-01-20 10:25:31,784 ERROR [org.springframework.web.context.ContextLoader] - <Context initialization failed>
org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 124 in XML document from class path resource [-----.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: ---; columnNumber: --; cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'oauth:resource-server'.
The reason is, if you check "spring.schema" of spring-security-oauth2, it is referring only "https" URLs. While most of the other spring project's spring.schema is referring to "HTTP" URLs. (It is a separate question why it is so!) Replacing HTTP URL with HTTPS fixes my issue.
Several other people also faced issue because of spring resolving schemaLocaion from the internet for example: Spring schemaLocation fails when there is no internet connection
Question: Is there a way to restrict spring from resolving schemaLocation from the internet and get an error if it is not resolved by jars in classpath? Because that causes the issue could not be identified during development but comes later on production.
