Merge remote-tracking branch 'apache-commit/trunk' into HDDS-48

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/StringUtils.java

@@ -36,7 +36,7 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 import org.apache.commons.lang.SystemUtils;
-import org.apache.commons.lang.time.FastDateFormat;
+import org.apache.commons.lang3.time.FastDateFormat;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.fs.Path;

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestStringUtils.java

@@ -40,7 +40,7 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
 
-import org.apache.commons.lang.time.FastDateFormat;
+import org.apache.commons.lang3.time.FastDateFormat;
 import org.apache.hadoop.test.UnitTestcaseTimeLimit;
 import org.apache.hadoop.util.StringUtils.TraditionalBinaryPrefix;
 import org.junit.Test;

hadoop-hdds/container-service/src/main/proto/StorageContainerDatanodeProtocol.proto

@@ -79,6 +79,7 @@ message SCMHeartbeatRequestProto {
   required DatanodeDetailsProto datanodeDetails = 1;
   optional NodeReportProto nodeReport = 2;
   optional ContainerReportsProto containerReport = 3;
+  optional ContainerActionsProto containerActions = 4;
 }
 
 /*
@@ -122,20 +123,33 @@ enum StorageTypeProto {
   PROVIDED = 5;
 }
 
-/**
-A set of container reports, max count is generally set to
-8192 since that keeps the size of the reports under 1 MB.
-*/
 message ContainerReportsProto {
-  repeated ContainerInfo reports = 2;
+  repeated ContainerInfo reports = 1;
 }
 
+message ContainerActionsProto {
+  repeated ContainerAction containerActions = 1;
+}
+
+message ContainerAction {
+  enum Action {
+    CLOSE = 1;
+  }
+
+  enum Reason {
+    CONTAINER_FULL = 1;
+  }
+
+  required ContainerInfo container = 1;
+  required Action action = 2;
+  optional Reason reason = 3;
+}
 
 /**
 A container report contains the following information.
 */
 message ContainerInfo {
-  optional string finalhash = 1;
+  required int64 containerID = 1;
   optional int64 size = 2;
   optional int64 used = 3;
   optional int64 keyCount = 4;
@@ -144,7 +158,7 @@ message ContainerInfo {
   optional int64 writeCount = 6;
   optional int64 readBytes = 7;
   optional int64 writeBytes = 8;
-  required int64 containerID = 9;
+  optional string finalhash = 9;
   optional hadoop.hdds.LifeCycleState state = 10;
 }
 

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java

@@ -146,6 +146,8 @@ public class WebHdfsFileSystem extends FileSystem
   public static final String EZ_HEADER = "X-Hadoop-Accept-EZ";
   public static final String FEFINFO_HEADER = "X-Hadoop-feInfo";
 
+  public static final String SPECIAL_FILENAME_CHARACTERS_REGEX = ".*[;+%].*";
+
   /**
    * Default connection factory may be overridden in tests to use smaller
    * timeout values
@@ -606,8 +608,10 @@ public class WebHdfsFileSystem extends FileSystem
     if (fspath != null) {
       URI fspathUri = fspath.toUri();
       String fspathUriDecoded = fspathUri.getPath();
+      boolean pathAlreadyEncoded = false;
       try {
         fspathUriDecoded = URLDecoder.decode(fspathUri.getPath(), "UTF-8");
+        pathAlreadyEncoded = true;
       } catch (IllegalArgumentException ex) {
         LOG.trace("Cannot decode URL encoded file", ex);
       }
@@ -617,7 +621,12 @@ public class WebHdfsFileSystem extends FileSystem
         StringBuilder fsPathEncodedItems = new StringBuilder();
         for (String fsPathItem : fspathItems) {
           fsPathEncodedItems.append("/");
-          fsPathEncodedItems.append(URLEncoder.encode(fsPathItem, "UTF-8"));
+          if (fsPathItem.matches(SPECIAL_FILENAME_CHARACTERS_REGEX) ||
+              pathAlreadyEncoded) {
+            fsPathEncodedItems.append(URLEncoder.encode(fsPathItem, "UTF-8"));
+          } else {
+            fsPathEncodedItems.append(fsPathItem);
+          }
         }
         encodedFSPath = new Path(fspathUri.getScheme(),
                 fspathUri.getAuthority(), fsPathEncodedItems.substring(1));

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

@@ -110,11 +110,15 @@ public class TestDFSAdmin {
   private static final PrintStream OLD_OUT = System.out;
   private static final PrintStream OLD_ERR = System.err;
   private String tempResource = null;
+  private static final int NUM_DATANODES = 2;
 
   @Before
   public void setUp() throws Exception {
     conf = new Configuration();
     conf.setInt(IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, 3);
+    conf.setInt(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 512);
+    conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR,
+        GenericTestUtils.getRandomizedTempPath());
     restartCluster();
 
     admin = new DFSAdmin(conf);
@@ -157,7 +161,8 @@ public class TestDFSAdmin {
     if (cluster != null) {
       cluster.shutdown();
     }
-    cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
+    cluster = new MiniDFSCluster.Builder(conf)
+        .numDataNodes(NUM_DATANODES).build();
     cluster.waitActive();
     datanode = cluster.getDataNodes().get(0);
     namenode = cluster.getNameNode();
@@ -904,40 +909,34 @@ public class TestDFSAdmin {
 
   @Test(timeout = 300000L)
   public void testCheckNumOfBlocksInReportCommand() throws Exception {
-    Configuration config = new Configuration();
+    DistributedFileSystem dfs = cluster.getFileSystem();
-    config.setInt(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 512);
+    Path path = new Path("/tmp.txt");
-    config.set(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, "3s");
 
-    int numOfDatanodes = 1;
+    DatanodeInfo[] dn = dfs.getDataNodeStats();
-    MiniDFSCluster miniDFSCluster = new MiniDFSCluster.Builder(config)
+    assertEquals(dn.length, NUM_DATANODES);
-        .numDataNodes(numOfDatanodes).build();
+    // Block count should be 0, as no files are created
-    try {
+    int actualBlockCount = 0;
-      miniDFSCluster.waitActive();
+    for (DatanodeInfo d : dn) {
-      DistributedFileSystem dfs = miniDFSCluster.getFileSystem();
+      actualBlockCount += d.getNumBlocks();
-      Path path= new Path("/tmp.txt");
-
-      DatanodeInfo[] dn = dfs.getDataNodeStats();
-      assertEquals(dn.length, numOfDatanodes);
-      //Block count should be 0, as no files are created
-      assertEquals(dn[0].getNumBlocks(), 0);
-
-
-      //Create a file with 2 blocks
-      DFSTestUtil.createFile(dfs, path, 1024, (short) 1, 0);
-      int expectedBlockCount = 2;
-
-      //Wait for One Heartbeat
-      Thread.sleep(3 * 1000);
-
-      dn = dfs.getDataNodeStats();
-      assertEquals(dn.length, numOfDatanodes);
-
-      //Block count should be 2, as file is created with block count 2
-      assertEquals(dn[0].getNumBlocks(), expectedBlockCount);
-
-    } finally {
-      cluster.shutdown();
     }
+    assertEquals(0, actualBlockCount);
+
+    // Create a file with 2 blocks
+    DFSTestUtil.createFile(dfs, path, 1024, (short) 1, 0);
+    int expectedBlockCount = 2;
+
+    // Wait for One Heartbeat
+    Thread.sleep(3 * 1000);
+
+    dn = dfs.getDataNodeStats();
+    assertEquals(dn.length, NUM_DATANODES);
+
+    // Block count should be 2, as file is created with block count 2
+    actualBlockCount = 0;
+    for (DatanodeInfo d : dn) {
+      actualBlockCount += d.getNumBlocks();
+    }
+    assertEquals(expectedBlockCount, actualBlockCount);
   }
 
   @Test

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHdfsUrl.java

@@ -414,4 +414,59 @@ public class TestWebHdfsUrl {
     }
   }
 
+  private static final String BACKWARD_COMPATIBLE_SPECIAL_CHARACTER_FILENAME =
+          "specialFile ?\"\\()[]_-=&,{}#'`~!@$^*|<>.";
+
+  @Test
+  public void testWebHdfsBackwardCompatibleSpecialCharacterFile()
+          throws Exception {
+
+    assertFalse(BACKWARD_COMPATIBLE_SPECIAL_CHARACTER_FILENAME
+            .matches(WebHdfsFileSystem.SPECIAL_FILENAME_CHARACTERS_REGEX));
+
+    UserGroupInformation ugi =
+            UserGroupInformation.createRemoteUser("test-user");
+    ugi.setAuthenticationMethod(KERBEROS);
+    UserGroupInformation.setLoginUser(ugi);
+
+    final Configuration conf = WebHdfsTestUtil.createConf();
+    final Path dir = new Path("/testWebHdfsSpecialCharacterFile");
+
+    final short numDatanodes = 1;
+    final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
+            .numDataNodes(numDatanodes)
+            .build();
+    try {
+      cluster.waitActive();
+      final FileSystem fs = WebHdfsTestUtil
+              .getWebHdfsFileSystem(conf, WebHdfs.SCHEME);
+
+      //create a file
+      final long length = 1L << 10;
+      final Path file1 = new Path(dir,
+              BACKWARD_COMPATIBLE_SPECIAL_CHARACTER_FILENAME);
+
+      DFSTestUtil.createFile(fs, file1, length, numDatanodes, 20120406L);
+
+      //get file status and check that it was written properly.
+      final FileStatus s1 = fs.getFileStatus(file1);
+      assertEquals("Write failed for file " + file1, length, s1.getLen());
+
+      boolean found = false;
+      RemoteIterator<LocatedFileStatus> statusRemoteIterator =
+              fs.listFiles(dir, false);
+      while (statusRemoteIterator.hasNext()) {
+        LocatedFileStatus locatedFileStatus = statusRemoteIterator.next();
+        if (locatedFileStatus.isFile() &&
+                BACKWARD_COMPATIBLE_SPECIAL_CHARACTER_FILENAME
+                        .equals(locatedFileStatus.getPath().getName())) {
+          found = true;
+        }
+      }
+      assertFalse("Could not find file with special character", !found);
+    } finally {
+      cluster.shutdown();
+    }
+  }
+
 }

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TaskAttemptImpl.java

@@ -18,7 +18,7 @@
 
 package org.apache.hadoop.mapreduce.v2.app.job.impl;
 
-import static org.apache.commons.lang.StringUtils.isEmpty;
+import static org.apache.commons.lang3.StringUtils.isEmpty;
 
 import java.io.IOException;
 import java.net.InetAddress;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/AppController.java

@@ -25,7 +25,7 @@ import java.net.URLDecoder;
 
 import javax.servlet.http.HttpServletResponse;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.mapreduce.JobACL;
 import org.apache.hadoop.mapreduce.v2.api.records.JobId;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/TaskPage.java

@@ -27,7 +27,7 @@ import static org.apache.hadoop.yarn.webapp.view.JQueryUI.tableInit;
 import java.util.EnumSet;
 import java.util.Collection;
 
-import org.apache.commons.lang.StringEscapeUtils;
+import org.apache.commons.lang3.StringEscapeUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.mapreduce.MRConfig;
 import org.apache.hadoop.mapreduce.v2.api.records.JobId;
@@ -134,8 +134,8 @@ public class TaskPage extends AppView {
         .append(getAttemptId(taskId, ta)).append("\",\"")
         .append(progress).append("\",\"")
         .append(ta.getState().toString()).append("\",\"")
-        .append(StringEscapeUtils.escapeJavaScript(
+        .append(StringEscapeUtils.escapeEcmaScript(
-              StringEscapeUtils.escapeHtml(ta.getStatus()))).append("\",\"")
+              StringEscapeUtils.escapeHtml4(ta.getStatus()))).append("\",\"")
 
         .append(nodeHttpAddr == null ? "N/A" :
             "<a class='nodelink' href='" + MRWebAppUtil.getYARNWebappScheme() + nodeHttpAddr + "'>"
@@ -151,8 +151,8 @@ public class TaskPage extends AppView {
         .append(ta.getStartTime()).append("\",\"")
         .append(ta.getFinishTime()).append("\",\"")
         .append(ta.getElapsedTime()).append("\",\"")
-        .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(
+        .append(StringEscapeUtils.escapeEcmaScript(
-          diag)));
+            StringEscapeUtils.escapeHtml4(diag)));
         if (enableUIActions) {
           attemptsTableData.append("\",\"");
           if (EnumSet.of(

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/TasksBlock.java

@@ -24,7 +24,7 @@ import static org.apache.hadoop.yarn.util.StringHelper.join;
 import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR;
 import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR_VALUE;
 
-import org.apache.commons.lang.StringEscapeUtils;
+import org.apache.commons.lang3.StringEscapeUtils;
 import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
 import org.apache.hadoop.mapreduce.v2.app.job.Task;
 import org.apache.hadoop.mapreduce.v2.app.webapp.dao.TaskInfo;
@@ -103,8 +103,8 @@ public class TasksBlock extends HtmlBlock {
       .append(join(pct, '%')).append("'> ").append("<div class='")
       .append(C_PROGRESSBAR_VALUE).append("' style='")
       .append(join("width:", pct, '%')).append("'> </div> </div>\",\"")
-      .append(StringEscapeUtils.escapeJavaScript(
+      .append(StringEscapeUtils.escapeEcmaScript(
-              StringEscapeUtils.escapeHtml(info.getStatus()))).append("\",\"")
+              StringEscapeUtils.escapeHtml4(info.getStatus()))).append("\",\"")
 
       .append(info.getState()).append("\",\"")
       .append(info.getStartTime()).append("\",\"")

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/webapp/TestAppController.java

@@ -22,7 +22,7 @@ import static org.mockito.Mockito.*;
 import java.io.IOException;
 import java.util.Iterator;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.mapreduce.JobACL;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/checkpoint/RandomNameCNS.java

@@ -17,7 +17,7 @@
  */
 package org.apache.hadoop.mapreduce.checkpoint;
 
-import org.apache.commons.lang.RandomStringUtils;
+import org.apache.commons.lang3.RandomStringUtils;
 
 /**
  * Simple naming service that generates a random checkpoint name.

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/jobhistory/HumanReadableHistoryViewerPrinter.java

@@ -17,7 +17,7 @@
  */
 package org.apache.hadoop.mapreduce.jobhistory;
 
-import org.apache.commons.lang.time.FastDateFormat;
+import org.apache.commons.lang3.time.FastDateFormat;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.mapred.JobStatus;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/PathOutputCommitterFactory.java

@@ -23,7 +23,7 @@ import java.io.IOException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/security/TokenCache.java

@@ -22,7 +22,7 @@ import java.io.IOException;
 import java.util.HashSet;
 import java.util.Set;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/tools/CLI.java

@@ -31,7 +31,7 @@ import java.util.HashSet;
 import java.util.Arrays;
 
 import com.google.common.annotations.VisibleForTesting;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.classification.InterfaceAudience.Private;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/partition/TestRehashPartitioner.java

@@ -22,7 +22,7 @@ import static org.junit.Assert.*;
 import java.util.Arrays;
 import java.util.Collections;
 
-import org.apache.commons.lang.ArrayUtils;
+import org.apache.commons.lang3.ArrayUtils;
 import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.io.NullWritable;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsJobsBlock.java

@@ -21,7 +21,7 @@ package org.apache.hadoop.mapreduce.v2.hs.webapp;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
-import org.apache.commons.lang.StringEscapeUtils;
+import org.apache.commons.lang3.StringEscapeUtils;
 import org.apache.hadoop.mapreduce.v2.app.AppContext;
 import org.apache.hadoop.mapreduce.v2.app.job.Job;
 import org.apache.hadoop.mapreduce.v2.hs.webapp.dao.JobInfo;
@@ -83,11 +83,11 @@ public class HsJobsBlock extends HtmlBlock {
       .append(dateFormat.format(new Date(job.getFinishTime()))).append("\",\"")
       .append("<a href='").append(url("job", job.getId())).append("'>")
       .append(job.getId()).append("</a>\",\"")
-      .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(
+      .append(StringEscapeUtils.escapeEcmaScript(StringEscapeUtils.escapeHtml4(
         job.getName()))).append("\",\"")
-      .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(
+      .append(StringEscapeUtils.escapeEcmaScript(StringEscapeUtils.escapeHtml4(
         job.getUserName()))).append("\",\"")
-      .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(
+      .append(StringEscapeUtils.escapeEcmaScript(StringEscapeUtils.escapeHtml4(
         job.getQueueName()))).append("\",\"")
       .append(job.getState()).append("\",\"")
       .append(String.valueOf(job.getMapsTotal())).append("\",\"")

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsTaskPage.java

@@ -29,7 +29,7 @@ import static org.apache.hadoop.yarn.webapp.view.JQueryUI.tableInit;
 
 import java.util.Collection;
 
-import org.apache.commons.lang.StringEscapeUtils;
+import org.apache.commons.lang3.StringEscapeUtils;
 import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
 import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
 import org.apache.hadoop.mapreduce.v2.app.job.TaskAttempt;
@@ -147,8 +147,8 @@ public class HsTaskPage extends HsView {
         attemptsTableData.append("[\"")
         .append(getAttemptId(taskId, ta)).append("\",\"")
         .append(ta.getState()).append("\",\"")
-        .append(StringEscapeUtils.escapeJavaScript(
+        .append(StringEscapeUtils.escapeEcmaScript(
-              StringEscapeUtils.escapeHtml(ta.getStatus()))).append("\",\"")
+              StringEscapeUtils.escapeHtml4(ta.getStatus()))).append("\",\"")
 
         .append("<a class='nodelink' href='" + MRWebAppUtil.getYARNWebappScheme() + nodeHttpAddr + "'>")
         .append(nodeRackName + "/" + nodeHttpAddr + "</a>\",\"")
@@ -171,8 +171,8 @@ public class HsTaskPage extends HsView {
           .append(elapsedReduceTime).append("\",\"");
         }
           attemptsTableData.append(attemptElapsed).append("\",\"")
-          .append(StringEscapeUtils.escapeJavaScript(
+          .append(StringEscapeUtils.escapeEcmaScript(
-              StringEscapeUtils.escapeHtml(ta.getNote())))
+              StringEscapeUtils.escapeHtml4(ta.getNote())))
           .append("\"],\n");
       }
        //Remove the last comma and close off the array of arrays

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientCache.java

@@ -22,7 +22,7 @@ import java.io.IOException;
 import java.security.PrivilegedAction;
 import java.util.HashMap;
 import java.util.Map;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.RPC;
 import org.apache.hadoop.mapreduce.JobID;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientServiceDelegate.java

@@ -28,7 +28,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
 import org.apache.hadoop.ipc.RPC;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/NotRunningJob.java

@@ -23,7 +23,7 @@ import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.HashMap;
 
-import org.apache.commons.lang.NotImplementedException;
+import org.apache.commons.lang3.NotImplementedException;
 import org.apache.hadoop.mapreduce.v2.api.MRClientProtocol;
 import org.apache.hadoop.mapreduce.v2.api.protocolrecords.CancelDelegationTokenRequest;
 import org.apache.hadoop.mapreduce.v2.api.protocolrecords.CancelDelegationTokenResponse;
@@ -167,7 +167,7 @@ public class NotRunningJob implements MRClientProtocol {
   public GetTaskAttemptReportResponse getTaskAttemptReport(
       GetTaskAttemptReportRequest request) throws IOException {
     //not invoked by anybody
-    throw new NotImplementedException();
+    throw new NotImplementedException("Code is not implemented");
   }
 
   @Override
@@ -222,26 +222,26 @@ public class NotRunningJob implements MRClientProtocol {
   public GetDelegationTokenResponse getDelegationToken(
       GetDelegationTokenRequest request) throws IOException {
     /* Should not be invoked by anyone. */
-    throw new NotImplementedException();
+    throw new NotImplementedException("Code is not implemented");
   }
 
   @Override
   public RenewDelegationTokenResponse renewDelegationToken(
       RenewDelegationTokenRequest request) throws IOException {
     /* Should not be invoked by anyone. */
-    throw new NotImplementedException();
+    throw new NotImplementedException("Code is not implemented");
   }
 
   @Override
   public CancelDelegationTokenResponse cancelDelegationToken(
       CancelDelegationTokenRequest request) throws IOException {
     /* Should not be invoked by anyone. */
-    throw new NotImplementedException();
+    throw new NotImplementedException("Code is not implemented");
   }
 
   @Override
   public InetSocketAddress getConnectAddress() {
     /* Should not be invoked by anyone.  Normally used to set token service */
-    throw new NotImplementedException();
+    throw new NotImplementedException("Code is not implemented");
   }
 }

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/YARNRunner.java

@@ -18,7 +18,7 @@
 
 package org.apache.hadoop.mapred;
 
-import static org.apache.commons.lang.StringUtils.isEmpty;
+import static org.apache.commons.lang3.StringUtils.isEmpty;
 import static org.apache.hadoop.mapreduce.MRJobConfig.MR_AM_RESOURCE_PREFIX;
 
 import java.io.IOException;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestJobCounters.java

@@ -29,7 +29,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.StringTokenizer;
 
-import org.apache.commons.lang.RandomStringUtils;
+import org.apache.commons.lang3.RandomStringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileSystem;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/lib/db/TestDBOutputFormat.java

@@ -20,7 +20,7 @@ package org.apache.hadoop.mapreduce.lib.db;
 import java.io.IOException;
 import java.lang.reflect.Field;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.NullWritable;
 import org.apache.hadoop.mapreduce.Job;

hadoop-mapreduce-project/hadoop-mapreduce-client/pom.xml

@@ -142,11 +142,6 @@
       <artifactId>commons-cli</artifactId>
       <scope>provided</scope>
     </dependency>
-    <dependency>
-      <groupId>commons-lang</groupId>
-      <artifactId>commons-lang</artifactId>
-      <scope>provided</scope>
-    </dependency>
     <dependency>
       <groupId>commons-collections</groupId>
       <artifactId>commons-collections</artifactId>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/BaseServiceRecordProcessor.java

@@ -290,6 +290,26 @@ public abstract class BaseServiceRecordProcessor
           domain));
     }
 
+    /**
+     * Return the DNS name constructed from the component name.
+     *
+     * @return the DNS naem.
+     * @throws PathNotFoundException
+     * @throws TextParseException
+     */
+    protected Name getComponentName()
+        throws PathNotFoundException, TextParseException {
+      String service = RegistryPathUtils.lastPathEntry(
+          RegistryPathUtils.parentOf(RegistryPathUtils.parentOf(getPath())));
+      String component = getRecord().get("yarn:component").toLowerCase();
+      String user = RegistryPathUtils.getUsername(getPath());
+      return Name.fromString(MessageFormat.format("{0}.{1}.{2}.{3}",
+          component,
+          service,
+          user,
+          domain));
+    }
+
   }
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/ContainerServiceRecordProcessor.java

@@ -242,7 +242,8 @@ public class ContainerServiceRecordProcessor extends
       }
       try {
         this.setTarget(InetAddress.getByName(ip));
-        this.setNames(new Name[] {getContainerName(), getContainerIDName()});
+        this.setNames(new Name[] {getContainerName(), getContainerIDName(),
+            getComponentName()});
       } catch (Exception e) {
         throw new IllegalStateException(e);
       }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/server/dns/TestRegistryDNS.java

@@ -115,32 +115,47 @@ public class TestRegistryDNS extends Assert {
       + "}\n";
   static final String CONTAINER_RECORD = "{\n"
       + "  \"type\" : \"JSONServiceRecord\",\n"
-      + "  \"description\" : \"COMP-NAME\",\n"
+      + "  \"description\" : \"httpd-1\",\n"
       + "  \"external\" : [ ],\n"
       + "  \"internal\" : [ ],\n"
       + "  \"yarn:id\" : \"container_e50_1451931954322_0016_01_000002\",\n"
       + "  \"yarn:persistence\" : \"container\",\n"
       + "  \"yarn:ip\" : \"172.17.0.19\",\n"
-      + "  \"yarn:hostname\" : \"0a134d6329ba\"\n"
+      + "  \"yarn:hostname\" : \"host1\",\n"
+      + "  \"yarn:component\" : \"httpd\"\n"
+      + "}\n";
+
+  static final String CONTAINER_RECORD2 = "{\n"
+      + "  \"type\" : \"JSONServiceRecord\",\n"
+      + "  \"description\" : \"httpd-2\",\n"
+      + "  \"external\" : [ ],\n"
+      + "  \"internal\" : [ ],\n"
+      + "  \"yarn:id\" : \"container_e50_1451931954322_0016_01_000003\",\n"
+      + "  \"yarn:persistence\" : \"container\",\n"
+      + "  \"yarn:ip\" : \"172.17.0.20\",\n"
+      + "  \"yarn:hostname\" : \"host2\",\n"
+      + "  \"yarn:component\" : \"httpd\"\n"
       + "}\n";
 
   private static final String CONTAINER_RECORD_NO_IP = "{\n"
       + "  \"type\" : \"JSONServiceRecord\",\n"
-      + "  \"description\" : \"COMP-NAME\",\n"
+      + "  \"description\" : \"httpd-1\",\n"
       + "  \"external\" : [ ],\n"
       + "  \"internal\" : [ ],\n"
       + "  \"yarn:id\" : \"container_e50_1451931954322_0016_01_000002\",\n"
-      + "  \"yarn:persistence\" : \"container\"\n"
+      + "  \"yarn:persistence\" : \"container\",\n"
+      + "  \"yarn:component\" : \"httpd\"\n"
       + "}\n";
 
   private static final String CONTAINER_RECORD_YARN_PERSISTANCE_ABSENT = "{\n"
       + "  \"type\" : \"JSONServiceRecord\",\n"
-      + "  \"description\" : \"COMP-NAME\",\n"
+      + "  \"description\" : \"httpd-1\",\n"
       + "  \"external\" : [ ],\n"
       + "  \"internal\" : [ ],\n"
       + "  \"yarn:id\" : \"container_e50_1451931954322_0016_01_000003\",\n"
       + "  \"yarn:ip\" : \"172.17.0.19\",\n"
-      + "  \"yarn:hostname\" : \"0a134d6329bb\"\n"
+      + "  \"yarn:hostname\" : \"0a134d6329bb\",\n"
+      + "  \"yarn:component\" : \"httpd\""
       + "}\n";
 
   @Before
@@ -229,7 +244,7 @@ public class TestRegistryDNS extends Assert {
     assertEquals("wrong result", "172.17.0.19",
         ((ARecord) recs[0]).getAddress().getHostAddress());
 
-    recs = assertDNSQuery("comp-name.test1.root.dev.test.", 1);
+    recs = assertDNSQuery("httpd-1.test1.root.dev.test.", 1);
     assertTrue("not an ARecord", recs[0] instanceof ARecord);
   }
 
@@ -268,7 +283,7 @@ public class TestRegistryDNS extends Assert {
         ((ARecord) recs[0]).getAddress().getHostAddress());
     assertEquals("wrong ttl", 30L, recs[0].getTTL());
 
-    recs = assertDNSQuery("comp-name.test1.root.dev.test.", 1);
+    recs = assertDNSQuery("httpd-1.test1.root.dev.test.", 1);
     assertTrue("not an ARecord", recs[0] instanceof ARecord);
 
     assertEquals("wrong ttl", 30L, recs[0].getTTL());
@@ -286,7 +301,7 @@ public class TestRegistryDNS extends Assert {
     // start assessing whether correct records are available
     Record[] recs = assertDNSQuery("19.0.17.172.in-addr.arpa.", Type.PTR, 1);
     assertEquals("wrong result",
-        "comp-name.test1.root.dev.test.",
+        "httpd-1.test1.root.dev.test.",
         ((PTRRecord) recs[0]).getTarget().toString());
   }
 
@@ -312,7 +327,7 @@ public class TestRegistryDNS extends Assert {
     // start assessing whether correct records are available
     Record[] recs = assertDNSQuery("19.0.17.172.in-addr.arpa.", Type.PTR, 1);
     assertEquals("wrong result",
-        "comp-name.test1.root.dev.test.",
+        "httpd-1.test1.root.dev.test.",
         ((PTRRecord) recs[0]).getTarget().toString());
   }
 
@@ -490,7 +505,7 @@ public class TestRegistryDNS extends Assert {
     assertEquals("wrong result", "172.17.0.19",
         ((AAAARecord) recs[0]).getAddress().getHostAddress());
 
-    recs = assertDNSQuery("comp-name.test1.root.dev.test.", Type.AAAA, 1);
+    recs = assertDNSQuery("httpd-1.test1.root.dev.test.", Type.AAAA, 1);
     assertTrue("not an ARecord", recs[0] instanceof AAAARecord);
   }
 
@@ -565,13 +580,13 @@ public class TestRegistryDNS extends Assert {
     assertEquals("wrong result", "172.17.0.19",
         ((ARecord) recs[0]).getAddress().getHostAddress());
 
-    recs = assertDNSQuery("comp-name.test1.root.dev.test.", 1);
+    recs = assertDNSQuery("httpd-1.test1.root.dev.test.", 1);
     assertTrue("not an ARecord", recs[0] instanceof ARecord);
 
     // lookup dyanmic reverse records
     recs = assertDNSQuery("19.0.17.172.in-addr.arpa.", Type.PTR, 1);
     assertEquals("wrong result",
-        "comp-name.test1.root.dev.test.",
+        "httpd-1.test1.root.dev.test.",
         ((PTRRecord) recs[0]).getTarget().toString());
 
     // now lookup static reverse records
@@ -649,6 +664,27 @@ public class TestRegistryDNS extends Assert {
         assertDNSQueryNotNull("mail.yahoo.com.", Type.CNAME);
   }
 
+  @Test
+  public void testMultiARecord() throws Exception {
+    ServiceRecord record = getMarshal().fromBytes("somepath",
+        CONTAINER_RECORD.getBytes());
+    ServiceRecord record2 = getMarshal().fromBytes("somepath",
+        CONTAINER_RECORD2.getBytes());
+    getRegistryDNS().register(
+        "/registry/users/root/services/org-apache-slider/test1/components/"
+            + "ctr-e50-1451931954322-0016-01-000002",
+        record);
+    getRegistryDNS().register(
+        "/registry/users/root/services/org-apache-slider/test1/components/"
+            + "ctr-e50-1451931954322-0016-01-000003",
+        record2);
+
+    // start assessing whether correct records are available
+    Record[] recs =
+        assertDNSQuery("httpd.test1.root.dev.test.", 2);
+    assertTrue("not an ARecord", recs[0] instanceof ARecord);
+    assertTrue("not an ARecord", recs[1] instanceof ARecord);
+  }
   public RegistryDNS getRegistryDNS() {
     return registryDNS;
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.java

@@ -19,6 +19,7 @@
 package org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.ImmutableSet;
 import org.apache.commons.collections.IteratorUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -238,110 +239,118 @@ public class SingleConstraintAppPlacementAllocator<N extends SchedulerNode>
           "Only GUARANTEED execution type is supported.");
     }
 
-    PlacementConstraint constraint =
+    // Node partition
-        newSchedulingRequest.getPlacementConstraint();
-
-    // We only accept SingleConstraint
-    PlacementConstraint.AbstractConstraint ac = constraint.getConstraintExpr();
-    if (!(ac instanceof PlacementConstraint.SingleConstraint)) {
-      throwExceptionWithMetaInfo(
-          "Only accepts " + PlacementConstraint.SingleConstraint.class.getName()
-              + " as constraint-expression. Rejecting the new added "
-              + "constraint-expression.class=" + ac.getClass().getName());
-    }
-
-    PlacementConstraint.SingleConstraint singleConstraint =
-        (PlacementConstraint.SingleConstraint) ac;
-
-    // Make sure it is an anti-affinity request (actually this implementation
-    // should be able to support both affinity / anti-affinity without much
-    // effort. Considering potential test effort required. Limit to
-    // anti-affinity to intra-app and scope is node.
-    if (!singleConstraint.getScope().equals(PlacementConstraints.NODE)) {
-      throwExceptionWithMetaInfo(
-          "Only support scope=" + PlacementConstraints.NODE
-              + "now. PlacementConstraint=" + singleConstraint);
-    }
-
-    if (singleConstraint.getMinCardinality() != 0
-        || singleConstraint.getMaxCardinality() != 0) {
-      throwExceptionWithMetaInfo(
-          "Only support anti-affinity, which is: minCardinality=0, "
-              + "maxCardinality=1");
-    }
-
-    Set<PlacementConstraint.TargetExpression> targetExpressionSet =
-        singleConstraint.getTargetExpressions();
-    if (targetExpressionSet == null || targetExpressionSet.isEmpty()) {
-      throwExceptionWithMetaInfo(
-          "TargetExpression should not be null or empty");
-    }
-
-    // Set node partition
     String nodePartition = null;
-
     // Target allocation tags
     Set<String> targetAllocationTags = null;
 
-    for (PlacementConstraint.TargetExpression targetExpression : targetExpressionSet) {
+    PlacementConstraint constraint =
-      // Handle node partition
+        newSchedulingRequest.getPlacementConstraint();
-      if (targetExpression.getTargetType().equals(
-          PlacementConstraint.TargetExpression.TargetType.NODE_ATTRIBUTE)) {
-        // For node attribute target, we only support Partition now. And once
-        // YARN-3409 is merged, we will support node attribute.
-        if (!targetExpression.getTargetKey().equals(NODE_PARTITION)) {
-          throwExceptionWithMetaInfo("When TargetType="
-              + PlacementConstraint.TargetExpression.TargetType.NODE_ATTRIBUTE
-              + " only " + NODE_PARTITION + " is accepted as TargetKey.");
-        }
 
-        if (nodePartition != null) {
+    if (constraint != null) {
-          // This means we have duplicated node partition entry inside placement
+      // We only accept SingleConstraint
-          // constraint, which might be set by mistake.
+      PlacementConstraint.AbstractConstraint ac = constraint
-          throwExceptionWithMetaInfo(
+          .getConstraintExpr();
-              "Only one node partition targetExpression is allowed");
+      if (!(ac instanceof PlacementConstraint.SingleConstraint)) {
-        }
+        throwExceptionWithMetaInfo("Only accepts "
+            + PlacementConstraint.SingleConstraint.class.getName()
+                + " as constraint-expression. Rejecting the new added "
+            + "constraint-expression.class=" + ac.getClass().getName());
+      }
 
-        Set<String> values = targetExpression.getTargetValues();
+      PlacementConstraint.SingleConstraint singleConstraint =
-        if (values == null || values.isEmpty()) {
+          (PlacementConstraint.SingleConstraint) ac;
-          nodePartition = RMNodeLabelsManager.NO_LABEL;
-          continue;
-        }
 
-        if (values.size() > 1) {
+      // Make sure it is an anti-affinity request (actually this implementation
-          throwExceptionWithMetaInfo("Inside one targetExpression, we only "
+      // should be able to support both affinity / anti-affinity without much
-              + "support affinity to at most one node partition now");
+      // effort. Considering potential test effort required. Limit to
-        }
+      // anti-affinity to intra-app and scope is node.
+      if (!singleConstraint.getScope().equals(PlacementConstraints.NODE)) {
+        throwExceptionWithMetaInfo(
+            "Only support scope=" + PlacementConstraints.NODE
+                + "now. PlacementConstraint=" + singleConstraint);
+      }
 
-        nodePartition = values.iterator().next();
+      if (singleConstraint.getMinCardinality() != 0
-      } else if (targetExpression.getTargetType().equals(
+          || singleConstraint.getMaxCardinality() != 0) {
-          PlacementConstraint.TargetExpression.TargetType.ALLOCATION_TAG)) {
+        throwExceptionWithMetaInfo(
-        // Handle allocation tags
+            "Only support anti-affinity, which is: minCardinality=0, "
-        if (targetAllocationTags != null) {
+                + "maxCardinality=1");
-          // This means we have duplicated AllocationTag expressions entries
+      }
-          // inside placement constraint, which might be set by mistake.
-          throwExceptionWithMetaInfo(
-              "Only one AllocationTag targetExpression is allowed");
-        }
 
-        if (targetExpression.getTargetValues() == null || targetExpression
+      Set<PlacementConstraint.TargetExpression> targetExpressionSet =
-            .getTargetValues().isEmpty()) {
+          singleConstraint.getTargetExpressions();
-          throwExceptionWithMetaInfo("Failed to find allocation tags from "
+      if (targetExpressionSet == null || targetExpressionSet.isEmpty()) {
-              + "TargetExpressions or couldn't find self-app target.");
+        throwExceptionWithMetaInfo(
-        }
+            "TargetExpression should not be null or empty");
+      }
 
-        targetAllocationTags = new HashSet<>(
+      for (PlacementConstraint.TargetExpression targetExpression :
-            targetExpression.getTargetValues());
+          targetExpressionSet) {
+        // Handle node partition
+        if (targetExpression.getTargetType().equals(
+            PlacementConstraint.TargetExpression.TargetType.NODE_ATTRIBUTE)) {
+          // For node attribute target, we only support Partition now. And once
+          // YARN-3409 is merged, we will support node attribute.
+          if (!targetExpression.getTargetKey().equals(NODE_PARTITION)) {
+            throwExceptionWithMetaInfo("When TargetType="
+                + PlacementConstraint.TargetExpression.TargetType.NODE_ATTRIBUTE
+                + " only " + NODE_PARTITION + " is accepted as TargetKey.");
+          }
+
+          if (nodePartition != null) {
+            // This means we have duplicated node partition entry
+            // inside placement constraint, which might be set by mistake.
+            throwExceptionWithMetaInfo(
+                "Only one node partition targetExpression is allowed");
+          }
+
+          Set<String> values = targetExpression.getTargetValues();
+          if (values == null || values.isEmpty()) {
+            nodePartition = RMNodeLabelsManager.NO_LABEL;
+            continue;
+          }
+
+          if (values.size() > 1) {
+            throwExceptionWithMetaInfo("Inside one targetExpression, we only "
+                + "support affinity to at most one node partition now");
+          }
+
+          nodePartition = values.iterator().next();
+        } else if (targetExpression.getTargetType().equals(
+            PlacementConstraint.TargetExpression.TargetType.ALLOCATION_TAG)) {
+          // Handle allocation tags
+          if (targetAllocationTags != null) {
+            // This means we have duplicated AllocationTag expressions entries
+            // inside placement constraint, which might be set by mistake.
+            throwExceptionWithMetaInfo(
+                "Only one AllocationTag targetExpression is allowed");
+          }
+
+          if (targetExpression.getTargetValues() == null ||
+              targetExpression.getTargetValues().isEmpty()) {
+            throwExceptionWithMetaInfo("Failed to find allocation tags from "
+                + "TargetExpressions or couldn't find self-app target.");
+          }
+
+          targetAllocationTags = new HashSet<>(
+              targetExpression.getTargetValues());
+        }
+      }
+
+      if (targetAllocationTags == null) {
+        // That means we don't have ALLOCATION_TAG specified
+        throwExceptionWithMetaInfo(
+            "Couldn't find target expression with type == ALLOCATION_TAG,"
+                + " it is required to include one and only one target"
+                + " expression with type == ALLOCATION_TAG");
       }
     }
 
+    // If this scheduling request doesn't contain a placement constraint,
+    // we set allocation tags an empty set.
     if (targetAllocationTags == null) {
-      // That means we don't have ALLOCATION_TAG specified
+      targetAllocationTags = ImmutableSet.of();
-      throwExceptionWithMetaInfo(
-          "Couldn't find target expression with type == ALLOCATION_TAG, it is "
-              + "required to include one and only one target expression with "
-              + "type == ALLOCATION_TAG");
-
     }
 
     if (nodePartition == null) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestSchedulingRequestContainerAllocation.java

@@ -18,8 +18,15 @@
 
 package org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity;
 
+import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
+import org.apache.hadoop.yarn.api.records.ExecutionTypeRequest;
+import org.apache.hadoop.yarn.api.records.SchedulingRequest;
+import org.apache.hadoop.yarn.api.resource.PlacementConstraint;
+import org.apache.hadoop.yarn.api.resource.PlacementConstraints;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.TargetApplicationsNamespace;
 import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.Resource;
@@ -39,6 +46,8 @@ import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
+import static org.apache.hadoop.yarn.api.resource.PlacementConstraints.PlacementTargets.*;
+
 public class TestSchedulingRequestContainerAllocation {
   private final int GB = 1024;
 
@@ -393,4 +402,79 @@ public class TestSchedulingRequestContainerAllocation {
     Assert.assertTrue(caughtException);
     rm1.close();
   }
+
+  @Test
+  public void testSchedulingRequestWithNullConstraint() throws Exception {
+    Configuration csConf = TestUtils.getConfigurationWithMultipleQueues(
+        new Configuration());
+    csConf.set(YarnConfiguration.RM_PLACEMENT_CONSTRAINTS_HANDLER,
+        YarnConfiguration.SCHEDULER_RM_PLACEMENT_CONSTRAINTS_HANDLER);
+
+    // inject node label manager
+    MockRM rm1 = new MockRM(csConf) {
+      @Override
+      public RMNodeLabelsManager createNodeLabelManager() {
+        return mgr;
+      }
+    };
+
+    rm1.getRMContext().setNodeLabelManager(mgr);
+    rm1.start();
+
+    // 4 NMs.
+    MockNM[] nms = new MockNM[4];
+    RMNode[] rmNodes = new RMNode[4];
+    for (int i = 0; i < 4; i++) {
+      nms[i] = rm1.registerNode("192.168.0." + i + ":1234", 10 * GB);
+      rmNodes[i] = rm1.getRMContext().getRMNodes().get(nms[i].getNodeId());
+    }
+
+    // app1 -> c
+    RMApp app1 = rm1.submitApp(1 * GB, "app", "user", null, "c");
+    MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nms[0]);
+
+    CapacityScheduler cs = (CapacityScheduler) rm1.getResourceScheduler();
+
+    PlacementConstraint constraint = PlacementConstraints
+        .targetNotIn("node", allocationTag("t1"))
+        .build();
+    SchedulingRequest sc = SchedulingRequest
+        .newInstance(0, Priority.newInstance(1),
+            ExecutionTypeRequest.newInstance(ExecutionType.GUARANTEED),
+            ImmutableSet.of("t1"),
+            ResourceSizing.newInstance(1, Resource.newInstance(1024, 1)),
+            constraint);
+    AllocateRequest request = AllocateRequest.newBuilder()
+        .schedulingRequests(ImmutableList.of(sc)).build();
+    am1.allocate(request);
+
+    for (int i = 0; i < 4; i++) {
+      cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
+    }
+
+    FiCaSchedulerApp schedApp = cs.getApplicationAttempt(
+        am1.getApplicationAttemptId());
+    Assert.assertEquals(2, schedApp.getLiveContainers().size());
+
+
+    // Send another request with null placement constraint,
+    // ensure there is no NPE while handling this request.
+    sc = SchedulingRequest
+        .newInstance(1, Priority.newInstance(1),
+            ExecutionTypeRequest.newInstance(ExecutionType.GUARANTEED),
+            ImmutableSet.of("t2"),
+            ResourceSizing.newInstance(2, Resource.newInstance(1024, 1)),
+            null);
+    AllocateRequest request1 = AllocateRequest.newBuilder()
+        .schedulingRequests(ImmutableList.of(sc)).build();
+    am1.allocate(request1);
+
+    for (int i = 0; i < 4; i++) {
+      cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
+    }
+
+    Assert.assertEquals(4, schedApp.getLiveContainers().size());
+
+    rm1.close();
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/yarn-service/ServiceDiscovery.md

@@ -65,6 +65,18 @@ Note that YARN service framework assigns `COMPONENT_INSTANCE_NAME` for each cont
 assigned `0` since it is the first and only instance for the `hbasemaster` component. In case of `regionserver` component, it can have multiple containers
  and so be named as such: `regionserver-0`, `regionserver-1`, `regionserver-2` ... etc
 
+Each YARN service component also has Multi-A Records for container fault tolerance or load balancing via RegistryDNS.  The naming format is defined as:
+```
+${COMPONENT_NAME}.${SERVICE_NAME}.${USER}.${DOMAIN}
+```
+
+For example, a component named www for application app launched by Chuck with 3 containers will have DNS records that look like:
+```
+www.app.chuck.example.com IN A 123.123.123.1
+www.app.chuck.example.com IN A 123.123.123.1
+www.app.chuck.example.com IN A 123.123.123.1
+```
+
 `Disclaimer`: The DNS implementation is still experimental. It should not be used as a fully-functional DNS.
 
 
@@ -140,4 +152,4 @@ You can edit the `/etc/resolv.conf` to make your system use the registry DNS suc
 ```
 nameserver 192.168.154.3
 ```
-Alternatively, if you have a corporate DNS in your organization, you can configure zone forwarding so that the Registry DNS resolves hostnames for the domain used by the cluster.
+Alternatively, if you have a corporate DNS in your organization, you can configure zone forwarding so that the Registry DNS resolves hostnames for the domain used by the cluster.

pom.xml

@@ -375,6 +375,23 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
             </goals>
             <phase>pre-site</phase>
           </execution>
+          <execution>
+            <id>enforce-property</id>
+            <goals>
+              <goal>enforce</goal>
+            </goals>
+            <configuration>
+              <rules>
+                <requireProperty>
+                  <property>hadoop.version</property>
+                  <message>You must set a hadoop.version to be the same as ${project.version}</message>
+                  <regex>${project.version}</regex>
+                  <regexMessage>The hadoop.version property should be set and should be ${project.version}.</regexMessage>
+                </requireProperty>
+              </rules>
+              <fail>true</fail>
+              </configuration>
+          </execution>
         </executions>
       </plugin>
       <plugin>
@@ -428,30 +445,6 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
         <artifactId>dependency-check-maven</artifactId>
         <version>${dependency-check-maven.version}</version>
       </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-enforcer-plugin</artifactId>
-        <version>${maven-enforcer-plugin.version}</version>
-        <executions>
-          <execution>
-            <id>enforce-property</id>
-            <goals>
-              <goal>enforce</goal>
-            </goals>
-            <configuration>
-              <rules>
-                <requireProperty>
-                  <property>hadoop.version</property>
-                  <message>You must set a hadoop.version to be the same as ${project.version}</message>
-                  <regex>${project.version}</regex>
-                  <regexMessage>The hadoop.version property should be set and should be ${project.version}.</regexMessage>
-                </requireProperty>
-              </rules>
-              <fail>true</fail>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
     </plugins>
   </build>