YARN-8869. YARN Service Client might not work correctly with RM REST API for Kerberos authentication. Contributed by Eric Yang.

(cherry picked from commit fa94d370b6e3cba9c7560c09b517583e6652f103)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-api/src/main/java/org/apache/hadoop/yarn/service/client/ApiServiceClient.java

@@ -70,7 +70,6 @@ import org.slf4j.LoggerFactory;
 
 import com.sun.jersey.api.client.Client;
 import com.sun.jersey.api.client.ClientResponse;
-import com.sun.jersey.api.client.WebResource;
 import com.sun.jersey.api.client.WebResource.Builder;
 import com.sun.jersey.api.client.config.ClientConfig;
 import com.sun.jersey.api.client.config.DefaultClientConfig;
@@ -144,7 +143,7 @@ public class ApiServiceClient extends AppAdminClient {
   /**
    * Calculate Resource Manager address base on working REST API.
    */
-  private String getRMWebAddress() {
+  String getRMWebAddress() {
     Configuration conf = getConfig();
     String scheme = "http://";
     String path = "/app/v1/services/version";
@@ -156,8 +155,7 @@ public class ApiServiceClient extends AppAdminClient {
           .get("yarn.resourcemanager.webapp.https.address");
     }
     boolean useKerberos = UserGroupInformation.isSecurityEnabled();
-    List<String> rmServers = RMHAUtils
-        .getRMHAWebappAddresses(new YarnConfiguration(conf));
+    List<String> rmServers = getRMHAWebAddresses(conf);
     for (String host : rmServers) {
       try {
         Client client = Client.create();
@@ -175,16 +173,16 @@ public class ApiServiceClient extends AppAdminClient {
             LOG.debug("Fail to resolve username: {}", e);
           }
         }
-        WebResource webResource = client
-            .resource(sb.toString());
+        Builder builder = client
+            .resource(sb.toString()).type(MediaType.APPLICATION_JSON);
         if (useKerberos) {
           String[] server = host.split(":");
           String challenge = generateToken(server[0]);
-          webResource.header(HttpHeaders.AUTHORIZATION, "Negotiate " +
+          builder.header(HttpHeaders.AUTHORIZATION, "Negotiate " +
               challenge);
           LOG.debug("Authorization: Negotiate {}", challenge);
         }
-        ClientResponse test = webResource.get(ClientResponse.class);
+        ClientResponse test = builder.get(ClientResponse.class);
         if (test.getStatus() == 200) {
           rmAddress = host;
           break;
@@ -197,6 +195,11 @@ public class ApiServiceClient extends AppAdminClient {
     return scheme+rmAddress;
   }
 
+  List<String> getRMHAWebAddresses(Configuration conf) {
+    return RMHAUtils
+        .getRMHAWebappAddresses(new YarnConfiguration(conf));
+  }
+
   /**
    * Compute active resource manager API service location.
    *

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-api/src/test/java/org/apache/hadoop/yarn/service/client/TestSecureApiServiceClient.java

@@ -21,11 +21,19 @@ package org.apache.hadoop.yarn.service.client;
 import static org.junit.Assert.*;
 
 import java.io.File;
+import java.io.IOException;
 
 import javax.security.sasl.Sasl;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 
 import java.util.Map;
+import java.util.ArrayList;
+import java.util.Enumeration;
 import java.util.HashMap;
+import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.minikdc.KerberosSecurityTestcase;
@@ -33,6 +41,13 @@ import org.apache.hadoop.security.SecurityUtil;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.SaslRpcServer.QualityOfProtection;
 import org.apache.hadoop.security.UserGroupInformation.AuthenticationMethod;
+import org.apache.log4j.Logger;
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.server.ServerConnector;
+import org.eclipse.jetty.servlet.ServletContextHandler;
+import org.eclipse.jetty.servlet.ServletHolder;
+import org.eclipse.jetty.util.thread.QueuedThreadPool;
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -55,29 +70,119 @@ public class TestSecureApiServiceClient extends KerberosSecurityTestcase {
 
   private File keytabFile;
 
-  private Configuration conf = new Configuration();
+  private Configuration testConf = new Configuration();
 
   private Map<String, String> props;
+  private static Server server;
+  private static Logger LOG = Logger
+      .getLogger(TestSecureApiServiceClient.class);
+  private ApiServiceClient asc;
+
+  /**
+   * A mocked version of API Service for testing purpose.
+   *
+   */
+  @SuppressWarnings("serial")
+  public static class TestServlet extends HttpServlet {
+
+    private static boolean headerFound = false;
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+        throws ServletException, IOException {
+      Enumeration<String> headers = req.getHeaderNames();
+      while(headers.hasMoreElements()) {
+        String header = headers.nextElement();
+        LOG.info(header);
+      }
+      if (req.getHeader("Authorization")!=null) {
+        headerFound = true;
+        resp.setStatus(HttpServletResponse.SC_OK);
+      } else {
+        headerFound = false;
+        resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
+      }
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
+        throws ServletException, IOException {
+      resp.setStatus(HttpServletResponse.SC_OK);
+    }
+
+    @Override
+    protected void doPut(HttpServletRequest req, HttpServletResponse resp)
+        throws ServletException, IOException {
+      resp.setStatus(HttpServletResponse.SC_OK);
+    }
+
+    @Override
+    protected void doDelete(HttpServletRequest req, HttpServletResponse resp)
+        throws ServletException, IOException {
+      resp.setStatus(HttpServletResponse.SC_OK);
+    }
+
+    public static boolean isHeaderExist() {
+      return headerFound;
+    }
+  }
 
   @Before
   public void setUp() throws Exception {
     keytabFile = new File(getWorkDir(), "keytab");
     getKdc().createPrincipal(keytabFile, clientPrincipal, server1Principal,
         server2Principal);
-    SecurityUtil.setAuthenticationMethod(AuthenticationMethod.KERBEROS, conf);
-    UserGroupInformation.setConfiguration(conf);
+    SecurityUtil.setAuthenticationMethod(AuthenticationMethod.KERBEROS,
+        testConf);
+    UserGroupInformation.setConfiguration(testConf);
     UserGroupInformation.setShouldRenewImmediatelyForTests(true);
     props = new HashMap<String, String>();
     props.put(Sasl.QOP, QualityOfProtection.AUTHENTICATION.saslQop);
+    server = new Server(8088);
+    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(10);
+    ServletContextHandler context = new ServletContextHandler();
+    context.setContextPath("/app");
+    server.setHandler(context);
+    context.addServlet(new ServletHolder(TestServlet.class), "/*");
+    ((ServerConnector)server.getConnectors()[0]).setHost("localhost");
+    server.start();
+
+    List<String> rmServers = new ArrayList<String>();
+    rmServers.add("localhost:8088");
+    testConf.set("yarn.resourcemanager.webapp.address",
+        "localhost:8088");
+    asc = new ApiServiceClient() {
+      @Override
+      List<String> getRMHAWebAddresses(Configuration conf) {
+        return rmServers;
+      }
+    };
+    asc.serviceInit(testConf);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    server.stop();
   }
 
   @Test
   public void testHttpSpnegoChallenge() throws Exception {
     UserGroupInformation.loginUserFromKeytab(clientPrincipal, keytabFile
         .getCanonicalPath());
-    ApiServiceClient asc = new ApiServiceClient();
+    asc = new ApiServiceClient();
     String challenge = asc.generateToken("localhost");
     assertNotNull(challenge);
   }
 
+  @Test
+  public void testAuthorizationHeader() throws Exception {
+    UserGroupInformation.loginUserFromKeytab(clientPrincipal, keytabFile
+        .getCanonicalPath());
+    String rmAddress = asc.getRMWebAddress();
+    if (TestServlet.isHeaderExist()) {
+      assertEquals(rmAddress, "http://localhost:8088");
+    } else {
+      fail("Did not see Authorization header.");
+    }
+  }
 }