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From lium...@apache.org
Subject [42/50] [abbrv] hadoop git commit: HDFS-11359. DFSAdmin report command supports displaying maintenance state datanodes. Contributed by Yiqun Lin.
Date Tue, 06 Jun 2017 08:28:32 GMT
HDFS-11359. DFSAdmin report command supports displaying maintenance state datanodes. Contributed
by Yiqun Lin.


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/8d9084eb
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/8d9084eb
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/8d9084eb

Branch: refs/heads/HADOOP-13345
Commit: 8d9084eb62f4593d4dfeb618abacf6ae89019109
Parents: d95c82c
Author: Yiqun Lin <yqlin@apache.org>
Authored: Fri Jun 2 12:48:30 2017 +0800
Committer: Yiqun Lin <yqlin@apache.org>
Committed: Fri Jun 2 12:48:30 2017 +0800

----------------------------------------------------------------------
 .../hadoop/hdfs/protocol/HdfsConstants.java     |  2 +-
 .../hadoop/hdfs/protocolPB/PBHelperClient.java  |  8 ++
 .../src/main/proto/ClientNamenodeProtocol.proto |  2 +
 .../server/blockmanagement/DatanodeManager.java |  7 +-
 .../org/apache/hadoop/hdfs/tools/DFSAdmin.java  | 88 +++++++++---------
 .../src/site/markdown/HDFSCommands.md           |  4 +-
 .../hadoop/hdfs/TestMaintenanceState.java       | 94 ++++++++++++++++++++
 .../src/test/resources/testHDFSConf.xml         |  2 +-
 8 files changed, 161 insertions(+), 46 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/HdfsConstants.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/HdfsConstants.java
b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/HdfsConstants.java
index 0d31bc4..b636121 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/HdfsConstants.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/HdfsConstants.java
@@ -141,7 +141,7 @@ public final class HdfsConstants {
 
   // type of the datanode report
   public enum DatanodeReportType {
-    ALL, LIVE, DEAD, DECOMMISSIONING, ENTERING_MAINTENANCE
+    ALL, LIVE, DEAD, DECOMMISSIONING, ENTERING_MAINTENANCE, IN_MAINTENANCE
   }
 
   /* Hidden constructor */

http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelperClient.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelperClient.java
b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelperClient.java
index 141a05a..1c2c83f 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelperClient.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelperClient.java
@@ -1723,6 +1723,10 @@ public class PBHelperClient {
     case LIVE: return DatanodeReportTypeProto.LIVE;
     case DEAD: return DatanodeReportTypeProto.DEAD;
     case DECOMMISSIONING: return DatanodeReportTypeProto.DECOMMISSIONING;
+    case ENTERING_MAINTENANCE:
+      return DatanodeReportTypeProto.ENTERING_MAINTENANCE;
+    case IN_MAINTENANCE:
+      return DatanodeReportTypeProto.IN_MAINTENANCE;
     default:
       throw new IllegalArgumentException("Unexpected data type report:" + t);
     }
@@ -2126,6 +2130,10 @@ public class PBHelperClient {
     case LIVE: return DatanodeReportType.LIVE;
     case DEAD: return DatanodeReportType.DEAD;
     case DECOMMISSIONING: return DatanodeReportType.DECOMMISSIONING;
+    case ENTERING_MAINTENANCE:
+      return DatanodeReportType.ENTERING_MAINTENANCE;
+    case IN_MAINTENANCE:
+      return DatanodeReportType.IN_MAINTENANCE;
     default:
       throw new IllegalArgumentException("Unexpected data type report:" + t);
     }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/ClientNamenodeProtocol.proto
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/ClientNamenodeProtocol.proto
b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/ClientNamenodeProtocol.proto
index a4b6f0b..fb42271 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/ClientNamenodeProtocol.proto
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/ClientNamenodeProtocol.proto
@@ -332,6 +332,8 @@ enum DatanodeReportTypeProto {  // type of the datanode report
   LIVE = 2;
   DEAD = 3;
   DECOMMISSIONING = 4;
+  ENTERING_MAINTENANCE = 5;
+  IN_MAINTENANCE = 6;
 }
 
 message GetDatanodeReportRequestProto {

http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
index c303594..a786c6a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
@@ -1441,6 +1441,9 @@ public class DatanodeManager {
     final boolean listEnteringMaintenanceNodes =
         type == DatanodeReportType.ALL ||
         type == DatanodeReportType.ENTERING_MAINTENANCE;
+    final boolean listInMaintenanceNodes =
+        type == DatanodeReportType.ALL ||
+        type == DatanodeReportType.IN_MAINTENANCE;
 
     ArrayList<DatanodeDescriptor> nodes;
     final HostSet foundNodes = new HostSet();
@@ -1453,11 +1456,13 @@ public class DatanodeManager {
         final boolean isDead = isDatanodeDead(dn);
         final boolean isDecommissioning = dn.isDecommissionInProgress();
         final boolean isEnteringMaintenance = dn.isEnteringMaintenance();
+        final boolean isInMaintenance = dn.isInMaintenance();
 
         if (((listLiveNodes && !isDead) ||
             (listDeadNodes && isDead) ||
             (listDecommissioningNodes && isDecommissioning) ||
-            (listEnteringMaintenanceNodes && isEnteringMaintenance)) &&
+            (listEnteringMaintenanceNodes && isEnteringMaintenance) ||
+            (listInMaintenanceNodes && isInMaintenance)) &&
             hostConfigManager.isIncluded(dn)) {
           nodes.add(dn);
         }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
index 5375cd9..e59ea37 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
@@ -421,7 +421,8 @@ public class DFSAdmin extends FsShell {
    * "hdfs dfsadmin"
    */
   private static final String commonUsageSummary =
-    "\t[-report [-live] [-dead] [-decommissioning]]\n" +
+    "\t[-report [-live] [-dead] [-decommissioning] " +
+    "[-enteringmaintenance] [-inmaintenance]]\n" +
     "\t[-safemode <enter | leave | get | wait>]\n" +
     "\t[-saveNamespace [-beforeShutdown]]\n" +
     "\t[-rollEdits]\n" +
@@ -544,48 +545,51 @@ public class DFSAdmin extends FsShell {
     final boolean listDead = StringUtils.popOption("-dead", args);
     final boolean listDecommissioning =
         StringUtils.popOption("-decommissioning", args);
+    final boolean listEnteringMaintenance =
+        StringUtils.popOption("-enteringmaintenance", args);
+    final boolean listInMaintenance =
+        StringUtils.popOption("-inmaintenance", args);
+
 
     // If no filter flags are found, then list all DN types
-    boolean listAll = (!listLive && !listDead && !listDecommissioning);
+    boolean listAll = (!listLive && !listDead && !listDecommissioning
+        && !listEnteringMaintenance && !listInMaintenance);
 
     if (listAll || listLive) {
-      DatanodeInfo[] live = dfs.getDataNodeStats(DatanodeReportType.LIVE);
-      if (live.length > 0 || listLive) {
-        System.out.println("Live datanodes (" + live.length + "):\n");
-      }
-      if (live.length > 0) {
-        for (DatanodeInfo dn : live) {
-          System.out.println(dn.getDatanodeReport());
-          System.out.println();
-        }
-      }
+      printDataNodeReports(dfs, DatanodeReportType.LIVE, listLive, "Live");
     }
 
     if (listAll || listDead) {
-      DatanodeInfo[] dead = dfs.getDataNodeStats(DatanodeReportType.DEAD);
-      if (dead.length > 0 || listDead) {
-        System.out.println("Dead datanodes (" + dead.length + "):\n");
-      }
-      if (dead.length > 0) {
-        for (DatanodeInfo dn : dead) {
-          System.out.println(dn.getDatanodeReport());
-          System.out.println();
-        }
-      }
+      printDataNodeReports(dfs, DatanodeReportType.DEAD, listDead, "Dead");
     }
 
     if (listAll || listDecommissioning) {
-      DatanodeInfo[] decom =
-          dfs.getDataNodeStats(DatanodeReportType.DECOMMISSIONING);
-      if (decom.length > 0 || listDecommissioning) {
-        System.out.println("Decommissioning datanodes (" + decom.length
-            + "):\n");
-      }
-      if (decom.length > 0) {
-        for (DatanodeInfo dn : decom) {
-          System.out.println(dn.getDatanodeReport());
-          System.out.println();
-        }
+      printDataNodeReports(dfs, DatanodeReportType.DECOMMISSIONING,
+          listDecommissioning, "Decommissioning");
+    }
+
+    if (listAll || listEnteringMaintenance) {
+      printDataNodeReports(dfs, DatanodeReportType.ENTERING_MAINTENANCE,
+          listEnteringMaintenance, "Entering maintenance");
+    }
+
+    if (listAll || listInMaintenance) {
+      printDataNodeReports(dfs, DatanodeReportType.IN_MAINTENANCE,
+          listInMaintenance, "In maintenance");
+    }
+  }
+
+  private static void printDataNodeReports(DistributedFileSystem dfs,
+      DatanodeReportType type, boolean listNodes, String nodeState)
+      throws IOException {
+    DatanodeInfo[] nodes = dfs.getDataNodeStats(type);
+    if (nodes.length > 0 || listNodes) {
+      System.out.println(nodeState + " datanodes (" + nodes.length + "):\n");
+    }
+    if (nodes.length > 0) {
+      for (DatanodeInfo dn : nodes) {
+        System.out.println(dn.getDatanodeReport());
+        System.out.println();
       }
     }
   }
@@ -986,12 +990,13 @@ public class DFSAdmin extends FsShell {
       "hdfs dfsadmin\n" +
       commonUsageSummary;
 
-    String report ="-report [-live] [-dead] [-decommissioning]:\n" +
-      "\tReports basic filesystem information and statistics. \n" +
-      "\tThe dfs usage can be different from \"du\" usage, because it\n" +
-      "\tmeasures raw space used by replication, checksums, snapshots\n" +
-      "\tand etc. on all the DNs.\n" +
-      "\tOptional flags may be used to filter the list of displayed DNs.\n";
+    String report ="-report [-live] [-dead] [-decommissioning] "
+        + "[-enteringmaintenance] [-inmaintenance]:\n" +
+        "\tReports basic filesystem information and statistics. \n" +
+        "\tThe dfs usage can be different from \"du\" usage, because it\n" +
+        "\tmeasures raw space used by replication, checksums, snapshots\n" +
+        "\tand etc. on all the DNs.\n" +
+        "\tOptional flags may be used to filter the list of displayed DNs.\n";
 
     String safemode = "-safemode <enter|leave|get|wait|forceExit>:  Safe mode " +
         "maintenance command.\n" +
@@ -1779,7 +1784,8 @@ public class DFSAdmin extends FsShell {
   private static void printUsage(String cmd) {
     if ("-report".equals(cmd)) {
       System.err.println("Usage: hdfs dfsadmin"
-          + " [-report] [-live] [-dead] [-decommissioning]");
+          + " [-report] [-live] [-dead] [-decommissioning]"
+          + " [-enteringmaintenance] [-inmaintenance]");
     } else if ("-safemode".equals(cmd)) {
       System.err.println("Usage: hdfs dfsadmin"
           + " [-safemode enter | leave | get | wait | forceExit]");
@@ -1917,7 +1923,7 @@ public class DFSAdmin extends FsShell {
         return exitCode;
       }
     } else if ("-report".equals(cmd)) {
-      if (argv.length > 4) {
+      if (argv.length > 6) {
         printUsage(cmd);
         return exitCode;
       }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md b/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
index b8d1362..6765a8f 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
@@ -338,7 +338,7 @@ Runs a HDFS datanode.
 
 Usage:
 
-        hdfs dfsadmin [-report [-live] [-dead] [-decommissioning]]
+        hdfs dfsadmin [-report [-live] [-dead] [-decommissioning] [-enteringmaintenance]
[-inmaintenance]]
         hdfs dfsadmin [-safemode enter | leave | get | wait | forceExit]
         hdfs dfsadmin [-saveNamespace [-beforeShutdown]]
         hdfs dfsadmin [-rollEdits]
@@ -374,7 +374,7 @@ Usage:
 
 | COMMAND\_OPTION | Description |
 |:---- |:---- |
-| `-report` `[-live]` `[-dead]` `[-decommissioning]` | Reports basic filesystem information
and statistics, The dfs usage can be different from "du" usage, because it measures raw space
used by replication, checksums, snapshots and etc. on all the DNs. Optional flags may be used
to filter the list of displayed DataNodes. |
+| `-report` `[-live]` `[-dead]` `[-decommissioning]` `[-enteringmaintenance]` `[-inmaintenance]`
| Reports basic filesystem information and statistics, The dfs usage can be different from
"du" usage, because it measures raw space used by replication, checksums, snapshots and etc.
on all the DNs. Optional flags may be used to filter the list of displayed DataNodes. |
 | `-safemode` enter\|leave\|get\|wait\|forceExit | Safe mode maintenance command. Safe mode
is a Namenode state in which it <br/>1. does not accept changes to the name space (read-only)
<br/>2. does not replicate or delete blocks. <br/>Safe mode is entered automatically
at Namenode startup, and leaves safe mode automatically when the configured minimum percentage
of blocks satisfies the minimum replication condition. If Namenode detects any anomaly then
it will linger in safe mode till that issue is resolved. If that anomaly is the consequence
of a deliberate action, then administrator can use -safemode forceExit to exit safe mode.
The cases where forceExit may be required are<br/> 1. Namenode metadata is not consistent.
If Namenode detects that metadata has been modified out of band and can cause data loss, then
Namenode will enter forceExit state. At that point user can either restart Namenode with correct
metadata files or forceExit (if data loss is acceptable).<br/>2. Rollback c
 auses metadata to be replaced and rarely it can trigger safe mode forceExit state in Namenode.
In that case you may proceed by issuing -safemode forceExit.<br/> Safe mode can also
be entered manually, but then it can only be turned off manually as well. |
 | `-saveNamespace` `[-beforeShutdown]` | Save current namespace into storage directories
and reset edits log. Requires safe mode. If the "beforeShutdown" option is given, the NameNode
does a checkpoint if and only if no checkpoint has been done during a time window (a configurable
number of checkpoint periods). This is usually used before shutting down the NameNode to prevent
potential fsimage/editlog corruption. |
 | `-rollEdits` | Rolls the edit log on the active NameNode. |

http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestMaintenanceState.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestMaintenanceState.java
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestMaintenanceState.java
index b49fba0..e0dfb4a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestMaintenanceState.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestMaintenanceState.java
@@ -17,11 +17,18 @@
  */
 package org.apache.hadoop.hdfs;
 
+import static org.hamcrest.CoreMatchers.allOf;
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.not;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.PrintStream;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
@@ -29,6 +36,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.hadoop.fs.CommonConfigurationKeys;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
@@ -43,8 +51,10 @@ import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStorageInfo;
 import org.apache.hadoop.hdfs.server.datanode.DataNode;
 import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
 import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
+import org.apache.hadoop.hdfs.tools.DFSAdmin;
 import org.apache.hadoop.test.GenericTestUtils;
 import org.apache.hadoop.util.Time;
+import org.apache.hadoop.util.ToolRunner;
 import org.junit.Assert;
 import org.junit.Test;
 import org.slf4j.Logger;
@@ -1124,4 +1134,88 @@ public class TestMaintenanceState extends AdminStatesBaseTest {
       return null;
     }
   }
+
+  @Test(timeout = 120000)
+  public void testReportMaintenanceNodes() throws Exception {
+    ByteArrayOutputStream out = new ByteArrayOutputStream();
+    ByteArrayOutputStream err = new ByteArrayOutputStream();
+    System.setOut(new PrintStream(out));
+    System.setErr(new PrintStream(err));
+
+    LOG.info("Starting testReportMaintenanceNodes");
+    int expirationInMs = 30 * 1000;
+    int numNodes = 2;
+    setMinMaintenanceR(numNodes);
+
+    startCluster(1, numNodes);
+    getCluster().waitActive();
+
+    FileSystem fileSys = getCluster().getFileSystem(0);
+    getConf().set(CommonConfigurationKeys.FS_DEFAULT_NAME_KEY,
+        fileSys.getUri().toString());
+    DFSAdmin dfsAdmin = new DFSAdmin(getConf());
+
+    FSNamesystem fsn = getCluster().getNameNode().getNamesystem();
+    assertEquals(numNodes, fsn.getNumLiveDataNodes());
+
+    int ret = ToolRunner.run(dfsAdmin,
+        new String[] {"-report", "-enteringmaintenance", "-inmaintenance"});
+    assertEquals(0, ret);
+    assertThat(out.toString(),
+        is(allOf(containsString("Entering maintenance datanodes (0):"),
+            containsString("In maintenance datanodes (0):"),
+            not(containsString(
+                getCluster().getDataNodes().get(0).getDisplayName())),
+            not(containsString(
+                getCluster().getDataNodes().get(1).getDisplayName())))));
+
+    final Path file = new Path("/testReportMaintenanceNodes.dat");
+    writeFile(fileSys, file, numNodes, 1);
+
+    DatanodeInfo[] nodes = getFirstBlockReplicasDatanodeInfos(fileSys, file);
+    // Request maintenance for DataNodes1. The DataNode1 will not transition
+    // to the next state AdminStates.IN_MAINTENANCE immediately since there
+    // are not enough candidate nodes to satisfy the min maintenance
+    // replication.
+    DatanodeInfo maintenanceDN = takeNodeOutofService(0,
+        nodes[0].getDatanodeUuid(), Time.now() + expirationInMs, null, null,
+        AdminStates.ENTERING_MAINTENANCE);
+    assertEquals(1, fsn.getNumEnteringMaintenanceDataNodes());
+
+    // reset stream
+    out.reset();
+    err.reset();
+
+    ret = ToolRunner.run(dfsAdmin,
+        new String[] {"-report", "-enteringmaintenance"});
+    assertEquals(0, ret);
+    assertThat(out.toString(),
+        is(allOf(containsString("Entering maintenance datanodes (1):"),
+            containsString(nodes[0].getXferAddr()),
+            not(containsString(nodes[1].getXferAddr())))));
+
+    // reset stream
+    out.reset();
+    err.reset();
+
+    // start a new datanode to make state transition to
+    // AdminStates.IN_MAINTENANCE
+    getCluster().startDataNodes(getConf(), 1, true, null, null);
+    getCluster().waitActive();
+
+    waitNodeState(maintenanceDN, AdminStates.IN_MAINTENANCE);
+    assertEquals(1, fsn.getNumInMaintenanceLiveDataNodes());
+
+    ret = ToolRunner.run(dfsAdmin,
+        new String[] {"-report", "-inmaintenance"});
+    assertEquals(0, ret);
+    assertThat(out.toString(),
+        is(allOf(containsString("In maintenance datanodes (1):"),
+            containsString(nodes[0].getXferAddr()),
+            not(containsString(nodes[1].getXferAddr())),
+            not(containsString(
+                getCluster().getDataNodes().get(2).getDisplayName())))));
+
+    cleanupFile(getCluster().getFileSystem(), file);
+  }
 }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/8d9084eb/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml b/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
index 88518bf..9302507 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
@@ -15665,7 +15665,7 @@
       <comparators>
         <comparator>
           <type>RegexpComparator</type>
-          <expected-output>^-report \[-live\] \[-dead\] \[-decommissioning\]:(.)*</expected-output>
+          <expected-output>^-report \[-live\] \[-dead\] \[-decommissioning\] \[-enteringmaintenance\]
\[-inmaintenance\]:(.)*</expected-output>
         </comparator>
         <comparator>
           <type>RegexpComparator</type>


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