HDFS-7732. Fix the order of the parameters in DFSConfigKeys. Contributed by Brahma Reddy Battula.

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

@@ -576,6 +576,9 @@ Release 2.7.0 - UNRELEASED
     HDFS-7270. Add congestion signaling capability to DataNode write protocol.
     (wheat9)
 
+    HDFS-7732. Fix the order of the parameters in DFSConfigKeys.
+    (Brahma Reddy Battula via aajisaka)
+
   OPTIMIZATIONS
 
     HDFS-7454. Reduce memory footprint for AclEntries in NameNode.

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

@@ -505,11 +505,11 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
   public static final String DFS_CLIENT_READ_SHORTCIRCUIT_SKIP_CHECKSUM_KEY = "dfs.client.read.shortcircuit.skip.checksum";
   public static final boolean DFS_CLIENT_READ_SHORTCIRCUIT_SKIP_CHECKSUM_DEFAULT = false;
   public static final String DFS_CLIENT_READ_SHORTCIRCUIT_BUFFER_SIZE_KEY = "dfs.client.read.shortcircuit.buffer.size";
+  public static final int DFS_CLIENT_READ_SHORTCIRCUIT_BUFFER_SIZE_DEFAULT = 1024 * 1024;
   public static final String DFS_CLIENT_READ_SHORTCIRCUIT_STREAMS_CACHE_SIZE_KEY = "dfs.client.read.shortcircuit.streams.cache.size";
   public static final int DFS_CLIENT_READ_SHORTCIRCUIT_STREAMS_CACHE_SIZE_DEFAULT = 256;
   public static final String DFS_CLIENT_READ_SHORTCIRCUIT_STREAMS_CACHE_EXPIRY_MS_KEY = "dfs.client.read.shortcircuit.streams.cache.expiry.ms";
   public static final long DFS_CLIENT_READ_SHORTCIRCUIT_STREAMS_CACHE_EXPIRY_MS_DEFAULT = 5 * 60 * 1000;
-  public static final int DFS_CLIENT_READ_SHORTCIRCUIT_BUFFER_SIZE_DEFAULT = 1024 * 1024;
   public static final String DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC = "dfs.client.domain.socket.data.traffic";
   public static final boolean DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC_DEFAULT = false;
   public static final String DFS_CLIENT_MMAP_ENABLED= "dfs.client.mmap.enabled";