title: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse
body: <p>I'm trying to test Keycloak REST API.
  Instaled the version 2.1.0.Final.
  I can access the admin through browser with SSL without problems.</p>
  
  <p>I'm using the code above:</p>
  
  <pre><code>Keycloak keycloakClient = KeycloakBuilder.builder()
  .serverUrl("https://keycloak.intra.rps.com.br/auth")
  .realm("testrealm")
  .username("development")
  .password("development")
  .clientId("admin-cli")
  .resteasyClient(new ResteasyClientBuilder().connectionPoolSize(10).build())
  .build();
  List&lt;RealmRepresentation&gt; rr = keycloakClient.realms().findAll();
  </code></pre>
  
  <p>And got the error:</p>
  
  <pre><code>javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse
  
  javax.ws.rs.client.ResponseProcessingException: javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse
  at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.extractResult(ClientInvocation.java:141)
  at org.jboss.resteasy.client.jaxrs.internal.proxy.extractors.BodyEntityExtractor.extractEntity(BodyEntityExtractor.java:60)
  at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:104)
  at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76)
  at com.sun.proxy.$Proxy20.grantToken(Unknown Source)
  at org.keycloak.admin.client.token.TokenManager.grantToken(TokenManager.java:85)
  at org.keycloak.admin.client.token.TokenManager.getAccessToken(TokenManager.java:65)
  at org.keycloak.admin.client.token.TokenManager.getAccessTokenString(TokenManager.java:60)
  at org.keycloak.admin.client.resource.BearerAuthFilter.filter(BearerAuthFilter.java:52)
  at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:413)
  at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:102)
  at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76)
  at com.sun.proxy.$Proxy22.findAll(Unknown Source)
  at br.com.rps.itsm.sd.SgpKeycloakClient.doGet(SgpKeycloakClient.java:71)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
  at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
  at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
  at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
  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.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
  at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
  at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
  at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
  at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
  at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
  at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
  at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
  at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  at java.lang.Thread.run(Thread.java:745)
  Caused by: javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse
  at org.jboss.resteasy.core.interception.ClientReaderInterceptorContext.throwReaderNotFound(ClientReaderInterceptorContext.java:42)
  at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.getReader(AbstractReaderInterceptorContext.java:75)
  at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:52)
  at org.jboss.resteasy.plugins.interceptors.encoding.GZIPDecodingInterceptor.aroundReadFrom(GZIPDecodingInterceptor.java:59)
  at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:55)
  at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readFrom(ClientResponse.java:251)
  at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readEntity(ClientResponse.java:181)
  at org.jboss.resteasy.specimpl.BuiltResponse.readEntity(BuiltResponse.java:213)
  at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.extractResult(ClientInvocation.java:105)
  </code></pre>
  
  <p>I added the dependencies above, but do not solve my problem:</p>
  
  <pre><code>    &lt;dependency&gt;
              &lt;groupId&gt;org.jboss.resteasy&lt;/groupId&gt;
              &lt;artifactId&gt;resteasy-client&lt;/artifactId&gt;
              &lt;version&gt;3.0.19.Final&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
              &lt;groupId&gt;org.jboss.resteasy&lt;/groupId&gt;
              &lt;artifactId&gt;resteasy-jackson-provider&lt;/artifactId&gt;
              &lt;version&gt;3.0.19.Final&lt;/version&gt;
      &lt;/dependency&gt;
  </code></pre>
  
  <p>Any clues?</p>