Merged revision(s) 1604692 from hadoop/common/trunk:

HDFS-6507. Improve DFSAdmin to support HA cluster better. (Contributd by Zesheng Wu)
........

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1604695 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -207,6 +207,9 @@ Release 2.5.0 - UNRELEASED
     HDFS-4667. Capture renamed files/directories in snapshot diff report. (jing9
     and Binglin Chang via jing9)
 
+    HDFS-6507. Improve DFSAdmin to support HA cluster better.
+    (Zesheng Wu via vinayakumarb)
+
   OPTIMIZATIONS
 
     HDFS-6214. Webhdfs has poor throughput for files >2GB (daryn)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/HAUtil.java

@@ -38,6 +38,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.NameNodeProxies;
+import org.apache.hadoop.hdfs.NameNodeProxies.ProxyAndInfo;
 import org.apache.hadoop.hdfs.protocol.ClientProtocol;
 import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
 import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSelector;
@@ -351,18 +352,42 @@ public class HAUtil {
    */
   public static List<ClientProtocol> getProxiesForAllNameNodesInNameservice(
       Configuration conf, String nsId) throws IOException {
+    List<ProxyAndInfo<ClientProtocol>> proxies =
+        getProxiesForAllNameNodesInNameservice(conf, nsId, ClientProtocol.class);
+
+    List<ClientProtocol> namenodes = new ArrayList<ClientProtocol>(
+        proxies.size());
+    for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
+      namenodes.add(proxy.getProxy());
+    }
+    return namenodes;
+  }
+
+  /**
+   * Get an RPC proxy for each NN in an HA nameservice. Used when a given RPC
+   * call should be made on every NN in an HA nameservice, not just the active.
+   *
+   * @param conf configuration
+   * @param nsId the nameservice to get all of the proxies for.
+   * @param xface the protocol class.
+   * @return a list of RPC proxies for each NN in the nameservice.
+   * @throws IOException in the event of error.
+   */
+  public static <T> List<ProxyAndInfo<T>> getProxiesForAllNameNodesInNameservice(
+      Configuration conf, String nsId, Class<T> xface) throws IOException {
     Map<String, InetSocketAddress> nnAddresses =
         DFSUtil.getRpcAddressesForNameserviceId(conf, nsId, null);
     
-    List<ClientProtocol> namenodes = new ArrayList<ClientProtocol>();
+    List<ProxyAndInfo<T>> proxies = new ArrayList<ProxyAndInfo<T>>(
+        nnAddresses.size());
     for (InetSocketAddress nnAddress : nnAddresses.values()) {
-      NameNodeProxies.ProxyAndInfo<ClientProtocol> proxyInfo = null;
+      NameNodeProxies.ProxyAndInfo<T> proxyInfo = null;
       proxyInfo = NameNodeProxies.createNonHAProxy(conf,
-          nnAddress, ClientProtocol.class,
+          nnAddress, xface,
           UserGroupInformation.getCurrentUser(), false);
-      namenodes.add(proxyInfo.getProxy());
+      proxies.add(proxyInfo);
     }
-    return namenodes;
+    return proxies;
   }
   
   /**

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/NameNodeProxies.java

@@ -106,10 +106,13 @@ public class NameNodeProxies {
   public static class ProxyAndInfo<PROXYTYPE> {
     private final PROXYTYPE proxy;
     private final Text dtService;
+    private final InetSocketAddress address;
     
-    public ProxyAndInfo(PROXYTYPE proxy, Text dtService) {
+    public ProxyAndInfo(PROXYTYPE proxy, Text dtService,
+        InetSocketAddress address) {
       this.proxy = proxy;
       this.dtService = dtService;
+      this.address = address;
     }
     
     public PROXYTYPE getProxy() {
@@ -119,6 +122,10 @@ public class NameNodeProxies {
     public Text getDelegationTokenService() {
       return dtService;
     }
+
+    public InetSocketAddress getAddress() {
+      return address;
+    }
   }
 
   /**
@@ -161,7 +168,8 @@ public class NameNodeProxies {
         dtService = SecurityUtil.buildTokenService(
             NameNode.getAddress(nameNodeUri));
       }
-      return new ProxyAndInfo<T>(proxy, dtService);
+      return new ProxyAndInfo<T>(proxy, dtService,
+          NameNode.getAddress(nameNodeUri));
     }
   }
   
@@ -221,7 +229,8 @@ public class NameNodeProxies {
         dtService = SecurityUtil.buildTokenService(
             NameNode.getAddress(nameNodeUri));
       }
-      return new ProxyAndInfo<T>(proxy, dtService);
+      return new ProxyAndInfo<T>(proxy, dtService,
+          NameNode.getAddress(nameNodeUri));
     } else {
       LOG.warn("Currently creating proxy using " +
       		"LossyRetryInvocationHandler requires NN HA setup");
@@ -274,7 +283,7 @@ public class NameNodeProxies {
       throw new IllegalStateException(message);
     }
 
-    return new ProxyAndInfo<T>(proxy, dtService);
+    return new ProxyAndInfo<T>(proxy, dtService, nnAddr);
   }
   
   private static JournalProtocol createNNProxyWithJournalProtocol(

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java

@@ -49,6 +49,7 @@ import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.HAUtil;
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.NameNodeProxies;
+import org.apache.hadoop.hdfs.NameNodeProxies.ProxyAndInfo;
 import org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol;
 import org.apache.hadoop.hdfs.protocol.ClientProtocol;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
@@ -498,25 +499,60 @@ public class DFSAdmin extends FsShell {
       printUsage("-safemode");
       return;
     }
-    DistributedFileSystem dfs = getDFS();
-    boolean inSafeMode = dfs.setSafeMode(action);
 
-    //
+    DistributedFileSystem dfs = getDFS();
-    // If we are waiting for safemode to exit, then poll and
+    Configuration dfsConf = dfs.getConf();
-    // sleep till we are out of safemode.
+    URI dfsUri = dfs.getUri();
-    //
+    boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);
-    if (waitExitSafe) {
+
-      while (inSafeMode) {
+    if (isHaEnabled) {
-        try {
+      String nsId = dfsUri.getHost();
-          Thread.sleep(5000);
+      List<ProxyAndInfo<ClientProtocol>> proxies =
-        } catch (java.lang.InterruptedException e) {
+          HAUtil.getProxiesForAllNameNodesInNameservice(
-          throw new IOException("Wait Interrupted");
+          dfsConf, nsId, ClientProtocol.class);
+      for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
+        ClientProtocol haNn = proxy.getProxy();
+        boolean inSafeMode = haNn.setSafeMode(action, false);
+        if (waitExitSafe) {
+          inSafeMode = waitExitSafeMode(haNn, inSafeMode);
         }
-        inSafeMode = dfs.setSafeMode(SafeModeAction.SAFEMODE_GET);
+        System.out.println("Safe mode is " + (inSafeMode ? "ON" : "OFF")
+            + " in " + proxy.getAddress());
       }
+    } else {
+      boolean inSafeMode = dfs.setSafeMode(action);
+      if (waitExitSafe) {
+        inSafeMode = waitExitSafeMode(dfs, inSafeMode);
+      }
+      System.out.println("Safe mode is " + (inSafeMode ? "ON" : "OFF"));
     }
 
-    System.out.println("Safe mode is " + (inSafeMode ? "ON" : "OFF"));
+  }
+
+  private boolean waitExitSafeMode(DistributedFileSystem dfs, boolean inSafeMode)
+      throws IOException {
+    while (inSafeMode) {
+      try {
+        Thread.sleep(5000);
+      } catch (java.lang.InterruptedException e) {
+        throw new IOException("Wait Interrupted");
+      }
+      inSafeMode = dfs.setSafeMode(SafeModeAction.SAFEMODE_GET, false);
+    }
+    return inSafeMode;
+  }
+
+  private boolean waitExitSafeMode(ClientProtocol nn, boolean inSafeMode)
+      throws IOException {
+    while (inSafeMode) {
+      try {
+        Thread.sleep(5000);
+      } catch (java.lang.InterruptedException e) {
+        throw new IOException("Wait Interrupted");
+      }
+      inSafeMode = nn.setSafeMode(SafeModeAction.SAFEMODE_GET, false);
+    }
+    return inSafeMode;
   }
 
   /**
@@ -561,7 +597,24 @@ public class DFSAdmin extends FsShell {
     int exitCode = -1;
 
     DistributedFileSystem dfs = getDFS();
-    dfs.saveNamespace();
+    Configuration dfsConf = dfs.getConf();
+    URI dfsUri = dfs.getUri();
+    boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);
+
+    if (isHaEnabled) {
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<ClientProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
+          nsId, ClientProtocol.class);
+      for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
+        proxy.getProxy().saveNamespace();
+        System.out.println("Save namespace successful for " +
+            proxy.getAddress());
+      }
+    } else {
+      dfs.saveNamespace();
+      System.out.println("Save namespace successful");
+    }
     exitCode = 0;
    
     return exitCode;
@@ -583,15 +636,30 @@ public class DFSAdmin extends FsShell {
    */
   public int restoreFailedStorage(String arg) throws IOException {
     int exitCode = -1;
-
     if(!arg.equals("check") && !arg.equals("true") && !arg.equals("false")) {
       System.err.println("restoreFailedStorage valid args are true|false|check");
       return exitCode;
     }
     
     DistributedFileSystem dfs = getDFS();
-    Boolean res = dfs.restoreFailedStorage(arg);
+    Configuration dfsConf = dfs.getConf();
-    System.out.println("restoreFailedStorage is set to " + res);
+    URI dfsUri = dfs.getUri();
+    boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);
+
+    if (isHaEnabled) {
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<ClientProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
+          nsId, ClientProtocol.class);
+      for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
+        Boolean res = proxy.getProxy().restoreFailedStorage(arg);
+        System.out.println("restoreFailedStorage is set to " + res + " for "
+            + proxy.getAddress());
+      }
+    } else {
+      Boolean res = dfs.restoreFailedStorage(arg);
+      System.out.println("restoreFailedStorage is set to " + res);
+    }
     exitCode = 0;
 
     return exitCode;
@@ -607,7 +675,24 @@ public class DFSAdmin extends FsShell {
     int exitCode = -1;
 
     DistributedFileSystem dfs = getDFS();
-    dfs.refreshNodes();
+    Configuration dfsConf = dfs.getConf();
+    URI dfsUri = dfs.getUri();
+    boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);
+
+    if (isHaEnabled) {
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<ClientProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
+          nsId, ClientProtocol.class);
+      for (ProxyAndInfo<ClientProtocol> proxy: proxies) {
+        proxy.getProxy().refreshNodes();
+        System.out.println("Refresh nodes successful for " +
+            proxy.getAddress());
+      }
+    } else {
+      dfs.refreshNodes();
+      System.out.println("Refresh nodes successful");
+    }
     exitCode = 0;
    
     return exitCode;
@@ -641,7 +726,24 @@ public class DFSAdmin extends FsShell {
     }
 
     DistributedFileSystem dfs = (DistributedFileSystem) fs;
-    dfs.setBalancerBandwidth(bandwidth);
+    Configuration dfsConf = dfs.getConf();
+    URI dfsUri = dfs.getUri();
+    boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);
+
+    if (isHaEnabled) {
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<ClientProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
+          nsId, ClientProtocol.class);
+      for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
+        proxy.getProxy().setBalancerBandwidth(bandwidth);
+        System.out.println("Balancer bandwidth is set to " + bandwidth +
+            " for " + proxy.getAddress());
+      }
+    } else {
+      dfs.setBalancerBandwidth(bandwidth);
+      System.out.println("Balancer bandwidth is set to " + bandwidth);
+    }
     exitCode = 0;
 
     return exitCode;
@@ -937,11 +1039,18 @@ public class DFSAdmin extends FsShell {
       if (!HAUtil.isAtLeastOneActive(namenodes)) {
         throw new IOException("Cannot finalize with no NameNode active");
       }
-      for (ClientProtocol haNn : namenodes) {
+
-        haNn.finalizeUpgrade();
+      List<ProxyAndInfo<ClientProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
+          nsId, ClientProtocol.class);
+      for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
+        proxy.getProxy().finalizeUpgrade();
+        System.out.println("Finalize upgrade successful for " +
+            proxy.getAddress());
       }
     } else {
       dfs.finalizeUpgrade();
+      System.out.println("Finalize upgrade successful");
     }
     
     return 0;
@@ -958,9 +1067,25 @@ public class DFSAdmin extends FsShell {
   public int metaSave(String[] argv, int idx) throws IOException {
     String pathname = argv[idx];
     DistributedFileSystem dfs = getDFS();
-    dfs.metaSave(pathname);
+    Configuration dfsConf = dfs.getConf();
-    System.out.println("Created metasave file " + pathname + " in the log " +
+    URI dfsUri = dfs.getUri();
-        "directory of namenode " + dfs.getUri());
+    boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);
+
+    if (isHaEnabled) {
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<ClientProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
+          nsId, ClientProtocol.class);
+      for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
+        proxy.getProxy().metaSave(pathname);
+        System.out.println("Created metasave file " + pathname + " in the log "
+            + "directory of namenode " + proxy.getAddress());
+      }
+    } else {
+      dfs.metaSave(pathname);
+      System.out.println("Created metasave file " + pathname + " in the log " +
+          "directory of namenode " + dfs.getUri());
+    }
     return 0;
   }
 
@@ -1022,20 +1147,37 @@ public class DFSAdmin extends FsShell {
   public int refreshServiceAcl() throws IOException {
     // Get the current configuration
     Configuration conf = getConf();
-    
+
     // for security authorization
     // server principal for this call   
     // should be NN's one.
     conf.set(CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY, 
         conf.get(DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY, ""));
 
-    // Create the client
+    DistributedFileSystem dfs = getDFS();
-    RefreshAuthorizationPolicyProtocol refreshProtocol =
+    URI dfsUri = dfs.getUri();
-        NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
+    boolean isHaEnabled = HAUtil.isLogicalUri(conf, dfsUri);
-            RefreshAuthorizationPolicyProtocol.class).getProxy();
+
-    
+    if (isHaEnabled) {
-    // Refresh the authorization policy in-effect
+      // Run refreshServiceAcl for all NNs if HA is enabled
-    refreshProtocol.refreshServiceAcl();
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<RefreshAuthorizationPolicyProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(conf, nsId,
+              RefreshAuthorizationPolicyProtocol.class);
+      for (ProxyAndInfo<RefreshAuthorizationPolicyProtocol> proxy : proxies) {
+        proxy.getProxy().refreshServiceAcl();
+        System.out.println("Refresh service acl successful for "
+            + proxy.getAddress());
+      }
+    } else {
+      // Create the client
+      RefreshAuthorizationPolicyProtocol refreshProtocol =
+          NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
+              RefreshAuthorizationPolicyProtocol.class).getProxy();
+      // Refresh the authorization policy in-effect
+      refreshProtocol.refreshServiceAcl();
+      System.out.println("Refresh service acl successful");
+    }
     
     return 0;
   }
@@ -1054,14 +1196,32 @@ public class DFSAdmin extends FsShell {
     // should be NN's one.
     conf.set(CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY, 
         conf.get(DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY, ""));
- 
-    // Create the client
-    RefreshUserMappingsProtocol refreshProtocol =
-      NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
-          RefreshUserMappingsProtocol.class).getProxy();
 
-    // Refresh the user-to-groups mappings
+    DistributedFileSystem dfs = getDFS();
-    refreshProtocol.refreshUserToGroupsMappings();
+    URI dfsUri = dfs.getUri();
+    boolean isHaEnabled = HAUtil.isLogicalUri(conf, dfsUri);
+
+    if (isHaEnabled) {
+      // Run refreshUserToGroupsMapings for all NNs if HA is enabled
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<RefreshUserMappingsProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(conf, nsId,
+              RefreshUserMappingsProtocol.class);
+      for (ProxyAndInfo<RefreshUserMappingsProtocol> proxy : proxies) {
+        proxy.getProxy().refreshUserToGroupsMappings();
+        System.out.println("Refresh user to groups mapping successful for "
+            + proxy.getAddress());
+      }
+    } else {
+      // Create the client
+      RefreshUserMappingsProtocol refreshProtocol =
+          NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
+              RefreshUserMappingsProtocol.class).getProxy();
+
+      // Refresh the user-to-groups mappings
+      refreshProtocol.refreshUserToGroupsMappings();
+      System.out.println("Refresh user to groups mapping successful");
+    }
     
     return 0;
   }
@@ -1082,13 +1242,31 @@ public class DFSAdmin extends FsShell {
     conf.set(CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY, 
         conf.get(DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY, ""));
 
-    // Create the client
+    DistributedFileSystem dfs = getDFS();
-    RefreshUserMappingsProtocol refreshProtocol =
+    URI dfsUri = dfs.getUri();
-      NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
+    boolean isHaEnabled = HAUtil.isLogicalUri(conf, dfsUri);
-          RefreshUserMappingsProtocol.class).getProxy();
 
-    // Refresh the user-to-groups mappings
+    if (isHaEnabled) {
-    refreshProtocol.refreshSuperUserGroupsConfiguration();
+      // Run refreshSuperUserGroupsConfiguration for all NNs if HA is enabled
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<RefreshUserMappingsProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(conf, nsId,
+              RefreshUserMappingsProtocol.class);
+      for (ProxyAndInfo<RefreshUserMappingsProtocol> proxy : proxies) {
+        proxy.getProxy().refreshSuperUserGroupsConfiguration();
+        System.out.println("Refresh super user groups configuration " +
+            "successful for " + proxy.getAddress());
+      }
+    } else {
+      // Create the client
+      RefreshUserMappingsProtocol refreshProtocol =
+          NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
+              RefreshUserMappingsProtocol.class).getProxy();
+
+      // Refresh the user-to-groups mappings
+      refreshProtocol.refreshSuperUserGroupsConfiguration();
+      System.out.println("Refresh super user groups configuration successful");
+    }
 
     return 0;
   }
@@ -1102,15 +1280,33 @@ public class DFSAdmin extends FsShell {
     // should be NN's one.
     conf.set(CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY, 
         conf.get(DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY, ""));
- 
-    // Create the client
-    RefreshCallQueueProtocol refreshProtocol =
-      NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
-          RefreshCallQueueProtocol.class).getProxy();
 
-    // Refresh the call queue
+    DistributedFileSystem dfs = getDFS();
-    refreshProtocol.refreshCallQueue();
+    URI dfsUri = dfs.getUri();
-    
+    boolean isHaEnabled = HAUtil.isLogicalUri(conf, dfsUri);
+
+    if (isHaEnabled) {
+      // Run refreshCallQueue for all NNs if HA is enabled
+      String nsId = dfsUri.getHost();
+      List<ProxyAndInfo<RefreshCallQueueProtocol>> proxies =
+          HAUtil.getProxiesForAllNameNodesInNameservice(conf, nsId,
+              RefreshCallQueueProtocol.class);
+      for (ProxyAndInfo<RefreshCallQueueProtocol> proxy : proxies) {
+        proxy.getProxy().refreshCallQueue();
+        System.out.println("Refresh call queue successful for "
+            + proxy.getAddress());
+      }
+    } else {
+      // Create the client
+      RefreshCallQueueProtocol refreshProtocol =
+          NameNodeProxies.createProxy(conf, FileSystem.getDefaultUri(conf),
+              RefreshCallQueueProtocol.class).getProxy();
+
+      // Refresh the call queue
+      refreshProtocol.refreshCallQueue();
+      System.out.println("Refresh call queue successful");
+    }
+
     return 0;
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/TestDFSAdminWithHA.java

@@ -0,0 +1,231 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.tools;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
+import com.google.common.base.Charsets;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.CommonConfigurationKeys;
+import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
+import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.hdfs.DFSUtil;
+import org.apache.hadoop.hdfs.HAUtil;
+import org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster;
+import org.junit.After;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+public class TestDFSAdminWithHA {
+
+  private final ByteArrayOutputStream out = new ByteArrayOutputStream();
+  private final ByteArrayOutputStream err = new ByteArrayOutputStream();
+  private MiniQJMHACluster cluster;
+  private Configuration conf;
+  private DFSAdmin admin;
+  private PrintStream originOut;
+  private PrintStream originErr;
+
+  private static final String NSID = "ns1";
+
+  private void assertOutputMatches(String string) {
+    String errOutput = new String(out.toByteArray(), Charsets.UTF_8);
+    String output = new String(out.toByteArray(), Charsets.UTF_8);
+
+    if (!errOutput.matches(string) && !output.matches(string)) {
+      fail("Expected output to match '" + string +
+          "' but err_output was:\n" + errOutput +
+          "\n and output was: \n" + output);
+    }
+
+    out.reset();
+    err.reset();
+  }
+
+  private void setHAConf(Configuration conf, String nn1Addr, String nn2Addr) {
+    conf.set(CommonConfigurationKeysPublic.FS_DEFAULT_NAME_KEY,
+        "hdfs://" + NSID);
+    conf.set(DFSConfigKeys.DFS_NAMESERVICES, NSID);
+    conf.set(DFSConfigKeys.DFS_NAMESERVICE_ID, NSID);
+    conf.set(DFSUtil.addKeySuffixes(
+        DFSConfigKeys.DFS_HA_NAMENODES_KEY_PREFIX, NSID), "nn1,nn2");
+    conf.set(DFSConfigKeys.DFS_HA_NAMENODE_ID_KEY, "nn1");
+    conf.set(DFSUtil.addKeySuffixes(
+            DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY, NSID, "nn1"), nn1Addr);
+    conf.set(DFSUtil.addKeySuffixes(
+            DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY, NSID, "nn2"), nn2Addr);
+  }
+
+  private void setUpHaCluster(boolean security) throws Exception {
+    conf = new Configuration();
+    conf.setBoolean(CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION,
+        security);
+    cluster = new MiniQJMHACluster.Builder(conf).build();
+    setHAConf(conf, cluster.getDfsCluster().getNameNode(0).getHostAndPort(),
+        cluster.getDfsCluster().getNameNode(1).getHostAndPort());
+    cluster.getDfsCluster().getNameNode(0).getHostAndPort();
+    admin = new DFSAdmin();
+    admin.setConf(conf);
+    assertTrue(HAUtil.isHAEnabled(conf, "ns1"));
+
+    originOut = System.out;
+    originErr = System.err;
+    System.setOut(new PrintStream(out));
+    System.setErr(new PrintStream(err));
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    System.out.flush();
+    System.err.flush();
+    System.setOut(originOut);
+    System.setErr(originErr);
+  }
+
+  @Test(timeout = 30000)
+  public void testSetSafeMode() throws Exception {
+    setUpHaCluster(false);
+    // Enter safemode
+    int exitCode = admin.run(new String[] {"-safemode", "enter"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Safe mode is ON in.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+
+    // Get safemode
+    exitCode = admin.run(new String[] {"-safemode", "get"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    message = "Safe mode is ON in.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+
+    // Leave safemode
+    exitCode = admin.run(new String[] {"-safemode", "leave"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    message = "Safe mode is OFF in.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+
+    // Get safemode
+    exitCode = admin.run(new String[] {"-safemode", "get"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    message = "Safe mode is OFF in.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testSaveNamespace() throws Exception {
+    setUpHaCluster(false);
+    // Safe mode should be turned ON in order to create namespace image.
+    int exitCode = admin.run(new String[] {"-safemode", "enter"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Safe mode is ON in.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+
+    exitCode = admin.run(new String[] {"-saveNamespace"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    message = "Save namespace successful for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testRestoreFailedStorage() throws Exception {
+    setUpHaCluster(false);
+    int exitCode = admin.run(new String[] {"-restoreFailedStorage", "check"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "restoreFailedStorage is set to false for.*";
+    // Default is false
+    assertOutputMatches(message + "\n" + message + "\n");
+
+    exitCode = admin.run(new String[] {"-restoreFailedStorage", "true"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    message = "restoreFailedStorage is set to true for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+
+    exitCode = admin.run(new String[] {"-restoreFailedStorage", "false"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    message = "restoreFailedStorage is set to false for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testRefreshNodes() throws Exception {
+    setUpHaCluster(false);
+    int exitCode = admin.run(new String[] {"-refreshNodes"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Refresh nodes successful for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testSetBalancerBandwidth() throws Exception {
+    setUpHaCluster(false);
+    int exitCode = admin.run(new String[] {"-setBalancerBandwidth", "10"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Balancer bandwidth is set to 10 for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testMetaSave() throws Exception {
+    setUpHaCluster(false);
+    int exitCode = admin.run(new String[] {"-metasave", "dfs.meta"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Created metasave file dfs.meta in the log directory"
+        + " of namenode.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testRefreshServiceAcl() throws Exception {
+    setUpHaCluster(true);
+    int exitCode = admin.run(new String[] {"-refreshServiceAcl"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Refresh service acl successful for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testRefreshUserToGroupsMappings() throws Exception {
+    setUpHaCluster(false);
+    int exitCode = admin.run(new String[] {"-refreshUserToGroupsMappings"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Refresh user to groups mapping successful for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testRefreshSuperUserGroupsConfiguration() throws Exception {
+    setUpHaCluster(false);
+    int exitCode = admin.run(
+        new String[] {"-refreshSuperUserGroupsConfiguration"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Refresh super user groups configuration successful for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+
+  @Test (timeout = 30000)
+  public void testRefreshCallQueue() throws Exception {
+    setUpHaCluster(false);
+    int exitCode = admin.run(new String[] {"-refreshCallQueue"});
+    assertEquals(err.toString().trim(), 0, exitCode);
+    String message = "Refresh call queue successful for.*";
+    assertOutputMatches(message + "\n" + message + "\n");
+  }
+}

hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml

@@ -15714,8 +15714,8 @@
       </cleanup-commands>
       <comparators>
         <comparator>
-          <type>ExactComparator</type>
+          <type>RegexpComparator</type>
-          <expected-output></expected-output>
+          <expected-output>Refresh service acl successful(\n)*</expected-output>
         </comparator>
       </comparators>
     </test><!--
@@ -15951,8 +15951,8 @@
       </cleanup-commands>
       <comparators>
         <comparator>
-          <type>ExactComparator</type>
+          <type>RegexpComparator</type>
-          <expected-output></expected-output>
+          <expected-output>Save namespace successful(\n)*</expected-output>
         </comparator>
       </comparators>
     </test>
@@ -16367,8 +16367,8 @@
       </cleanup-commands>
       <comparators>
         <comparator>
-          <type>ExactComparator</type>
+          <type>RegexpComparator</type>
-          <expected-output></expected-output>
+          <expected-output>Refresh user to groups mapping successful(\n)*</expected-output>
         </comparator>
       </comparators>
     </test>
@@ -16383,8 +16383,8 @@
       </cleanup-commands>
       <comparators>
         <comparator>
-          <type>ExactComparator</type>
+          <type>RegexpComparator</type>
-          <expected-output></expected-output>
+          <expected-output>Refresh super user groups configuration successful(\n)*</expected-output>
         </comparator>
       </comparators>
     </test>
@@ -16453,8 +16453,8 @@
       </cleanup-commands>
       <comparators>
         <comparator>
-          <type>ExactComparator</type>
+          <type>RegexpComparator</type>
-          <expected-output></expected-output>
+          <expected-output>Balancer bandwidth is set to 104857600(\n)*</expected-output>
         </comparator>
       </comparators>
     </test>
@@ -16469,8 +16469,8 @@
       </cleanup-commands>
       <comparators>
         <comparator>
-          <type>ExactComparator</type>
+          <type>SubstringComparator</type>
-          <expected-output></expected-output>
+          <expected-output>Finalize upgrade successful</expected-output>
         </comparator>
       </comparators>
     </test>