So, i've figured it out by myself. Here is the solution for those who might have the same issue.
It seems Camel security 2.17.3 depends on Spring security 4.x...but the camel-context spring security part of the example is written in Spring security 3.x, which produces the errors above, because, indeed, in Spring security 4.x, there is no more default constructor for AffirmativeBased (which existed in 3.x version). So below are the changes to do in camel-context.xml. The <spring-security:http> becomes: <spring-security:http realm="User Restrict Realm"> *<spring-security:intercept-url pattern="/camel/**" access="hasRole('ROLE_USER') or hasRole('ROLE_ADMIN')"/>* <spring-security:http-basic/> <spring-security:remember-me/> </spring-security:http> And the accessDecisionManager becomes: <bean id="accessDecisionManager" class="org.springframework.security.access.vote.AffirmativeBased"> <property name="allowIfAllAbstainDecisions" value="true"/> *<constructor-arg> <list> <bean class="org.springframework.security.access.vote.RoleVoter"/> </list> </constructor-arg>* </bean> Then you can mvn install and mvn jetty:run without any error, and test the endpoints by passing the credentials in HTTP Authorization header. -- View this message in context: http://camel.465427.n5.nabble.com/Can-t-make-camel-example-spring-security-works-tp5786528p5786624.html Sent from the Camel - Users mailing list archive at Nabble.com.