title: keycloak error：No access_token from server
body: <p>When I use Keycloak's function Identity Providers to connect Keycloak and the oauth2 project from spring's official website,  Keycloak's console says 'No access_token from server'</p>
  
  <pre><code>ERROR [org.keycloak.broker.oidc.AbstractOAuth2IdentityProvider] (default task-2) Failed to maenter code hereke identity provider oauth callback: org.keycloak.broker.provider.IdentityBrokerException: No access_token from server.
          at org.keycloak.broker.oidc.OIDCIdentityProvider.verifyAccessToken(OIDCIdentityProvider.java:476)
          at org.keycloak.broker.oidc.OIDCIdentityProvider.getFederatedIdentity(OIDCIdentityProvider.java:344)
          at org.keycloak.broker.oidc.AbstractOAuth2IdentityProvider$Endpoint.authResponse(AbstractOAuth2IdentityProvider.java:422)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:498)
          at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)
          at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:509)
          at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:399)
          at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$0(ResourceMethodInvoker.java:363)
          at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
          at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:365)
          at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:337)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:137)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:106)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:132)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:100)
          at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:443)
          at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:233)
          at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:139)
          at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
          at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:142)
          at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:219)
          at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:227)
          at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
          at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:791)
          at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
          at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
          at org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:90)
          at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
          at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
          at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
          at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
          at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
          at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
          at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
          at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
          at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
          at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
          at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
          at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
          at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
          at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
          at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
          at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
          at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
          at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
          at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
          at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
          at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
          at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
          at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
          at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
          at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
          at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
          at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
          at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
          at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
          at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
          at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
          at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
          at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
          at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
          at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
          at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
          at io.undertow.server.Connectors.executeRootHandler(Connectors.java:360)
          at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
          at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
          at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
          at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
          at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
          at java.lang.Thread.run(Thread.java:748)
  </code></pre>
  
  <p>the code is as following:</p>
  
  <pre><code>@Override
          public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
              clients.inMemory()
                      .withClient("acme")
                      .secret("acmesecret")
                      .authorizedGrantTypes("authorization_code", "refresh_token",
                              "password").scopes("openid");
          }
  </code></pre>
  
  <p>I use openId connect as the identity provider and config as following:</p>
  
  <pre><code>Authorization URL:http://localhost:8222/uaa/oauth/authorize
  Token URL:http://localhost:8222/uaa/oauth/token 
  Client ID:acme 
  Client Secret:acmesecret
  </code></pre>
  
  <p>What should I do to fix the bug?
  Thanks</p>