HDFS-8740. Move DistributedFileSystem to hadoop-hdfs-client. Contributed by Mingliang Liu.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java → hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java

@@ -62,7 +62,6 @@ import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.fs.permission.FsAction;
 import org.apache.hadoop.fs.StorageType;
-import org.apache.hadoop.hdfs.client.HdfsAdmin;
 import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.apache.hadoop.hdfs.client.HdfsDataOutputStream;
 import org.apache.hadoop.hdfs.client.impl.CorruptFileBlockIterator;
@@ -115,7 +114,7 @@ public class DistributedFileSystem extends FileSystem {
   private boolean verifyChecksum = true;
   
   static{
-    HdfsConfiguration.init();
+    HdfsConfigurationLoader.init();
   }
 
   public DistributedFileSystem() {
@@ -171,7 +170,7 @@ public class DistributedFileSystem extends FileSystem {
   @Override
   public void setWorkingDirectory(Path dir) {
     String result = fixRelativePart(dir).toUri().getPath();
-    if (!DFSUtil.isValidName(result)) {
+    if (!DFSUtilClient.isValidName(result)) {
       throw new IllegalArgumentException("Invalid DFS directory name " + 
                                          result);
     }
@@ -195,7 +194,7 @@ public class DistributedFileSystem extends FileSystem {
   private String getPathName(Path file) {
     checkPath(file);
     String result = file.toUri().getPath();
-    if (!DFSUtil.isValidName(result)) {
+    if (!DFSUtilClient.isValidName(result)) {
       throw new IllegalArgumentException("Pathname " + result + " from " +
                                          file+" is not a valid DFS filename.");
     }
@@ -218,8 +217,7 @@ public class DistributedFileSystem extends FileSystem {
     final Path absF = fixRelativePart(p);
     return new FileSystemLinkResolver<BlockLocation[]>() {
       @Override
-      public BlockLocation[] doCall(final Path p)
-          throws IOException, UnresolvedLinkException {
+      public BlockLocation[] doCall(final Path p) throws IOException {
         return dfs.getBlockLocations(getPathName(p), start, len);
       }
       @Override

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

@@ -983,6 +983,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-9087. Add some jitter to DataNode.checkDiskErrorThread (Elliott Clark
     via Colin P. McCabe) 
 
+    HDFS-8740. Move DistributedFileSystem to hadoop-hdfs-client. (Mingliang Liu
+    via wheat9)
+
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than