title: Failed to make identity provider oauth callback: org.keycloak.broker.provider.IdentityBrokerException: No access_token from server
body: <p>We are intermittently (and having a very hard time replicating it, except for one user) getting this error message while using Keycloak 3.3.0 Final. This is when attempting to authenticate using Google.</p>
  
  <p>The stack trace is here:</p>
  
  <pre><code>org.keycloak.broker.oidc.OIDCIdentityProvider.verifyAccessToken(OIDCIdentityProvider.java:418)
          at org.keycloak.broker.oidc.OIDCIdentityProvider.getFederatedIdentity(OIDCIdentityProvider.java:334)
          at org.keycloak.broker.oidc.AbstractOAuth2IdentityProvider$Endpoint.authResponse(AbstractOAuth2IdentityProvider.java:317)
          at sun.reflect.GeneratedMethodAccessor498.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:498)
          at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)
          at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
          at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:138)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:107)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:133)
          at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:101)
          at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:406)
          at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:213)
          at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:228)
          at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
          at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
          at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
          at io.undertow.servlet.handlers.FilterHandler$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.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:131)
          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$0(UndertowDeploymentInfoService.java:1508)
          at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
          at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
          at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
          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:326)
          at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:812)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
          at java.lang.Thread.run(Thread.java:745)
  </code></pre>
  
  <p>The way we replicate this is by the user logging out of the application, going to log back in (at which point they notice it is taking a long time to authenticate), hit refresh and it brings them to a (keycloak) prompt asking for their user credentials. When they put these credentials in, it gives them the error, "We're sorry... Unexpected error when authenticating with identity provider"</p>
  
  <p>This is the error on the backend. It seems to be related to Oauth2 authentication.</p>
  
  <p>I am guessing that something in the refresh process the user is attempting is causing an issue with the access token? Maybe the initial login is generating one but on refresh?</p>
  
  <p>It's somewhat hard to debug this error very well because I have been unable to reproduce it on any of my devices, even when following the same workflow, and asking for the user's phone is.. unfeasible.</p>
  
  <p>Does anyone have any idea what might be going on here?</p>