HDFS-4295. Using port 1023 should be valid when starting Secure DataNode. Contributed by Stephen Chu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1419855 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -318,6 +318,9 @@ Release 2.0.3-alpha - Unreleased
     HDFS-4292. Sanity check not correct in RemoteBlockReader2.newBlockReader
     (Binglin Chang via todd)
 
+    HDFS-4295. Using port 1023 should be valid when starting Secure DataNode
+    (Stephen Chu via todd)
+
   BREAKDOWN OF HDFS-3077 SUBTASKS
 
     HDFS-3077. Quorum-based protocol for reading and writing edit logs.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/SecureDataNodeStarter.java

@@ -120,7 +120,7 @@ public class SecureDataNodeStarter implements Daemon {
     System.err.println("Successfully obtained privileged resources (streaming port = "
         + ss + " ) (http listener port = " + listener.getConnection() +")");
     
-    if ((ss.getLocalPort() >= 1023 || listener.getPort() >= 1023) &&
+    if ((ss.getLocalPort() > 1023 || listener.getPort() > 1023) &&
         UserGroupInformation.isSecurityEnabled()) {
       throw new RuntimeException("Cannot start secure datanode with unprivileged ports");
     }