# Configure Spring boot app as resource server to validate access token from AUth0 **URL:** \ **Category:** Get Help\ **Tags:** sdks-quickstarts, quickstarts-other\ **Created:** [April 28, 2023, 8:45pm UTC](https://community.auth0.com/t/configure-spring-boot-app-as-resource-server-to-validate-access-token-from-auth0/105779 "2023-04-28T20:45:14Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![kenobago](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/kenobago/32/46771_2.png) [@kenobago](https://community.auth0.com/u/kenobago)\ **Post date:** [April 28, 2023, 8:45pm UTC](https://community.auth0.com/t/configure-spring-boot-app-as-resource-server-to-validate-access-token-from-auth0/105779/1 "2023-04-28T20:45:14Z")
I’m using Spring boot 2.7.8v to integrate Oauth using Auth0. i have followed exactly the steps from the [docs](https://auth0.com/docs/quickstart/backend/java-spring-security5/01-authorization?_gl=1*1j23r35*rollup_ga*MTI2ODYzMzc5NS4xNjgyNjA2MTg3*rollup_ga_F1G3E656YZ*MTY4MjcwNjEwNC45LjEuMTY4MjcwNjMyMy40OS4wLjA.&_ga=2.133660750.1768498153.1682606187-1268633795.1682606187#configure-the-resource-server) to implement authentication in my app but i keep getting IllegalAurgmentException. here is the execption: ```auto Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2023-04-28 13:41:42.747 ERROR 25340 --- [main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'securityConfig': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.security.oauth2.resourceserver.jwt.issuer-uri' in value "${spring.security.oauth2.resourceserver.jwt.issuer-uri}" at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:405) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.25.jar:5.3.25] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.25.jar:5.3.25] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.8.jar:2.7.8] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.8.jar:2.7.8] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.8.jar:2.7.8] at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.8.jar:2.7.8] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.8.jar:2.7.8] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.8.jar:2.7.8] at com.kentechies.youtube.youtubeclone.YoutubeCloneApplication.main(YoutubeCloneApplication.java:17) ~[classes/:na] Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.security.oauth2.resourceserver.jwt.issuer-uri' in value "${spring.security.oauth2.resourceserver.jwt.issuer-uri}" at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:180) ~[spring-core-5.3.25.jar:5.3.25] at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) ~[spring-core-5.3.25.jar:5.3.25] at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239) ~[spring-core-5.3.25.jar:5.3.25] at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-5.3.25.jar:5.3.25] at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:191) ~[spring-context-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:936) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1332) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.25.jar:5.3.25] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.25.jar:5.3.25] ... 17 common frames omitted ``` My Application.yaml: ```auto spring: security: oauth2: resourceserver: jwt: issuer-uri: https://auth0.com/ audiences: http://localhost:8080/ data: mongodb: host: localhost port: 27017 database: clonedb cloud: aws: stack: auto: false ``` The class to validate JWT: ```auto @EnableWebSecurity public class SecurityConfig { @Value("${spring.security.oauth2.resourceserver.jwt.issuer-uri}") private String issuer; @Value("${spring.security.oauth2.resourceserver.jwt.audiences}") private String audiences; @Bean public SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception { httpSecurity.authorizeHttpRequests(authorize -> authorize.anyRequest().authenticated()) .sessionManagement() .sessionCreationPolicy(SessionCreationPolicy.STATELESS) .and() .oauth2ResourceServer(OAuth2ResourceServerConfigurer::jwt); return httpSecurity.build(); } @Bean JwtDecoder jwtDecoder() { NimbusJwtDecoder jwtDecoder = JwtDecoders.fromOidcIssuerLocation(issuer); OAuth2TokenValidator audienceValidator = new AudienceValidator(audiences); OAuth2TokenValidator withIssuer = JwtValidators.createDefaultWithIssuer(issuer); OAuth2TokenValidator withAudience = new DelegatingOAuth2TokenValidator<>(withIssuer, audienceValidator); jwtDecoder.setJwtValidator(withAudience); return jwtDecoder; } ``` Anyone with the solution should please help. i will be grateful. ---
**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\ **Post date:** [May 3, 2023, 3:11pm UTC](https://community.auth0.com/t/configure-spring-boot-app-as-resource-server-to-validate-access-token-from-auth0/105779/3 "2023-05-03T15:11:00Z")
Hi @kenobago, This exception indicates the application is not able to resolve the config from your `application.yaml` file. This SO thread has some strategies you can try: [yaml - getting Could not resolve placeholder while reading yml values in spring boot - Stack Overflow](https://stackoverflow.com/questions/70906457/getting-could-not-resolve-placeholder-while-reading-yml-values-in-spring-boot) ---
**Author:** ![kenobago](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/kenobago/32/46771_2.png) [@kenobago](https://community.auth0.com/u/kenobago)\ **Post date:** [May 3, 2023, 3:40pm UTC](https://community.auth0.com/t/configure-spring-boot-app-as-resource-server-to-validate-access-token-from-auth0/105779/4 "2023-05-03T15:40:46Z")
Thanks @dan.woda it got fixed after using [yamllint](https://www.yamllint.com/) to validate the `application.yam`l file ---
**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\ **Post date:** [May 3, 2023, 3:41pm UTC](https://community.auth0.com/t/configure-spring-boot-app-as-resource-server-to-validate-access-token-from-auth0/105779/5 "2023-05-03T15:41:05Z")
Awesome. Thanks for the update! ---
**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\ **Post date:** [May 17, 2023, 3:41pm UTC](https://community.auth0.com/t/configure-spring-boot-app-as-resource-server-to-validate-access-token-from-auth0/105779/6 "2023-05-17T15:41:34Z")
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