Merge -r 1477848:1477849 from trunk onto branch-2. Fixes HDFS-4778.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1480136 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -230,6 +230,9 @@ Release 2.0.5-beta - UNRELEASED
     HDFS-4748. MiniJournalCluster#restartJournalNode leaks resources, which 
     causes sporadic test failures. (Chris Nauroth via suresh)
 
+    HDFS-4778. Fixes some issues that the first patch on HDFS-2576 missed.
+    (ddas)
+
     HDFS-4785. Concat operation does not remove concatenated files from
     InodeMap. (suresh)
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java

@@ -170,7 +170,8 @@ public class BlockPlacementPolicyDefault extends BlockPlacementPolicy {
           results.add(remainingTargets[i]);
         }
       }
-      return results.toArray(new DatanodeDescriptor[results.size()]);
+      return getPipeline(writer,
+          results.toArray(new DatanodeDescriptor[results.size()]));
     } catch (NotEnoughReplicasException nr) {
       // Fall back to regular block placement disregarding favored nodes hint
       return chooseTarget(src, numOfReplicas, writer, 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java

@@ -326,7 +326,6 @@ public class DatanodeManager {
    *
    * @param address hostaddress:transfer address
    * @return the best match for the given datanode
-   * @throws IOException when no datanode is found for given address
    */
   DatanodeDescriptor getDatanodeDescriptor(String address) {
     DatanodeDescriptor node = null;

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFavoredNodesEndToEnd.java

@@ -22,6 +22,7 @@ import static org.junit.Assert.*;
 
 import java.util.ArrayList;
 import java.util.Random;
+import java.io.IOException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.UnknownHostException;
@@ -32,6 +33,7 @@ import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.hdfs.DFSTestUtil;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.client.HdfsDataOutputStream;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
@@ -67,7 +69,7 @@ public class TestFavoredNodesEndToEnd {
     }
   }
 
-  @Test
+  @Test(timeout=180000)
   public void testFavoredNodesEndToEnd() throws Exception {
     //create 10 files with random preferred nodes
     for (int i = 0; i < NUM_FILES; i++) {
@@ -80,11 +82,7 @@ public class TestFavoredNodesEndToEnd {
           4096, (short)3, (long)4096, null, datanode);
       out.write(SOME_BYTES);
       out.close();
-      BlockLocation[] locations = 
-          dfs.getClient().getBlockLocations(p.toUri().getPath(), 0, 
-              Long.MAX_VALUE);
-      //make sure we have exactly one block location, and three hosts
-      assertTrue(locations.length == 1 && locations[0].getHosts().length == 3);
+      BlockLocation[] locations = getBlockLocations(p);
       //verify the files got created in the right nodes
       for (BlockLocation loc : locations) {
         String[] hosts = loc.getNames();
@@ -94,7 +92,7 @@ public class TestFavoredNodesEndToEnd {
     }
   }
 
-  @Test
+  @Test(timeout=180000)
   public void testWhenFavoredNodesNotPresent() throws Exception {
     //when we ask for favored nodes but the nodes are not there, we should
     //get some other nodes. In other words, the write to hdfs should not fail
@@ -110,13 +108,10 @@ public class TestFavoredNodesEndToEnd {
         4096, (short)3, (long)4096, null, arbitraryAddrs);
     out.write(SOME_BYTES);
     out.close();
-    BlockLocation[] locations = 
-        dfs.getClient().getBlockLocations(p.toUri().getPath(), 0, 
-            Long.MAX_VALUE);
-    assertTrue(locations.length == 1 && locations[0].getHosts().length == 3);
+    getBlockLocations(p);
   }
 
-  @Test
+  @Test(timeout=180000)
   public void testWhenSomeNodesAreNotGood() throws Exception {
     //make some datanode not "good" so that even if the client prefers it,
     //the namenode would not give it as a replica to write to
@@ -136,12 +131,9 @@ public class TestFavoredNodesEndToEnd {
         4096, (short)3, (long)4096, null, addrs);
     out.write(SOME_BYTES);
     out.close();
-    BlockLocation[] locations = 
-        dfs.getClient().getBlockLocations(p.toUri().getPath(), 0, 
-            Long.MAX_VALUE);
     //reset the state
     d.stopDecommission();
-    assertTrue(locations.length == 1 && locations[0].getHosts().length == 3);
+    BlockLocation[] locations = getBlockLocations(p);
     //also make sure that the datanode[0] is not in the list of hosts
     String datanode0 = 
         datanodes.get(0).getXferAddress().getAddress().getHostAddress()
@@ -153,6 +145,14 @@ public class TestFavoredNodesEndToEnd {
     }
   }
 
+  private BlockLocation[] getBlockLocations(Path p) throws Exception {
+    DFSTestUtil.waitReplication(dfs, p, (short)3);
+    BlockLocation[] locations = dfs.getClient().getBlockLocations(
+        p.toUri().getPath(), 0, Long.MAX_VALUE);
+    assertTrue(locations.length == 1 && locations[0].getHosts().length == 3);
+    return locations;
+  }
+
   private String[] getStringForInetSocketAddrs(InetSocketAddress[] datanode) {
     String strs[] = new String[datanode.length];
     for (int i = 0; i < datanode.length; i++) {