HDFS-16895. [RBF] NamenodeHeartbeatService should use credentials of logged in user

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/NamenodeHeartbeatService.java

@@ -26,6 +26,7 @@
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.URI;
+import java.security.PrivilegedExceptionAction;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
@@ -45,6 +46,7 @@
 import org.apache.hadoop.hdfs.tools.NNHAServiceTarget;
 import org.apache.hadoop.hdfs.web.URLConnectionFactory;
 import org.apache.hadoop.net.NetUtils;
+import org.apache.hadoop.security.SecurityUtil;
 import org.codehaus.jettison.json.JSONArray;
 import org.codehaus.jettison.json.JSONException;
 import org.codehaus.jettison.json.JSONObject;
@@ -236,7 +238,15 @@ protected void serviceInit(Configuration configuration) throws Exception {
 
   @Override
   public void periodicInvoke() {
-    updateState();
+    try {
+      // Run using the login user credentials
+      SecurityUtil.doAsLoginUser((PrivilegedExceptionAction<Void>) () -> {
+        updateState();
+        return null;
+      });
+    } catch (IOException e) {
+      LOG.error("Cannot update namenode state", e);
+    }
   }
 
   /**

hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterNamenodeHeartbeat.java

@@ -26,6 +26,7 @@
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.NAMENODES;
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.NAMESERVICES;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 
@@ -36,6 +37,7 @@
 import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.contract.router.SecurityConfUtil;
 import org.apache.hadoop.hdfs.DFSUtil;
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.server.federation.MockResolver;
@@ -44,6 +46,7 @@
 import org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
 import org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeContext;
 import org.apache.hadoop.net.MockDomainNameResolver;
+import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.service.Service.STATE;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
@@ -318,4 +321,33 @@ private Configuration generateNamenodeConfiguration(
 
     return conf;
   }
+
+  @Test
+  public void testNamenodeHeartbeatWithSecurity() throws Exception {
+    Configuration conf = SecurityConfUtil.initSecurity();
+    MiniRouterDFSCluster testCluster = null;
+    try {
+      testCluster = new MiniRouterDFSCluster(true, 1, conf);
+      // Start Namenodes and routers
+      testCluster.startCluster(conf);
+      testCluster.startRouters();
+
+      // Register Namenodes to generate a NamenodeStatusReport
+      testCluster.registerNamenodes();
+      testCluster.waitNamenodeRegistration();
+
+      for (MiniRouterDFSCluster.RouterContext routerContext : testCluster.getRouters()) {
+        ActiveNamenodeResolver resolver = routerContext.getRouter().getNamenodeResolver();
+        // Validate that NamenodeStatusReport has been registered
+        assertNotNull(resolver.getNamespaces());
+        assertFalse(resolver.getNamespaces().isEmpty());
+      }
+    } finally {
+      if (testCluster != null) {
+        testCluster.shutdown();
+      }
+      UserGroupInformation.reset();
+      SecurityConfUtil.destroy();
+    }
+  }
 }