HDFS-9131. Move config keys used by hdfs-client to HdfsClientConfigKeys. Contributed by Mingliang Liu.

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

@@ -143,6 +143,17 @@ public interface HdfsClientConfigKeys {
   String REPLICA_ACCESSOR_BUILDER_CLASSES_KEY =
       PREFIX + "replica.accessor.builder.classes";
 
+  // The number of NN response dropped by client proactively in each RPC call.
+  // For testing NN retry cache, we can set this property with positive value.
+  String  DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY =
+      "dfs.client.test.drop.namenode.response.number";
+  int     DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT = 0;
+  String  DFS_CLIENT_LOCAL_INTERFACES = "dfs.client.local.interfaces";
+  // HDFS client HTrace configuration.
+  String  DFS_CLIENT_HTRACE_PREFIX = "dfs.client.htrace.";
+  String  DFS_USER_HOME_DIR_PREFIX_KEY = "dfs.user.home.dir.prefix";
+  String  DFS_USER_HOME_DIR_PREFIX_DEFAULT = "/user";
+
   /** dfs.client.retry configuration properties */
   interface Retry {
     String PREFIX = HdfsClientConfigKeys.PREFIX + "retry.";

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

@@ -953,6 +953,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-9130. Use GenericTestUtils#setLogLevel to the logging level.
     (Mingliang Liu via wheat9)
 
+    HDFS-9131 Move config keys used by hdfs-client to HdfsClientConfigKeys.
+    (Mingliang Liu via wheat9)
+    
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

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

@@ -95,6 +95,7 @@ import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.FsAction;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.hdfs.NameNodeProxiesClient.ProxyAndInfo;
+import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
 import org.apache.hadoop.hdfs.client.HdfsDataOutputStream;
 import org.apache.hadoop.hdfs.client.impl.DfsClientConf;
@@ -284,19 +285,20 @@ public class DFSClient implements java.io.Closeable, RemotePeerFactory,
   
   /** 
    * Create a new DFSClient connected to the given nameNodeUri or rpcNamenode.
-   * If HA is enabled and a positive value is set for 
-   * {@link DFSConfigKeys#DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY} in the
-   * configuration, the DFSClient will use {@link LossyRetryInvocationHandler}
-   * as its RetryInvocationHandler. Otherwise one of nameNodeUri or rpcNamenode 
-   * must be null.
+   * If HA is enabled and a positive value is set for
+   * {@link HdfsClientConfigKeys#DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY}
+   * in the configuration, the DFSClient will use
+   * {@link LossyRetryInvocationHandler} as its RetryInvocationHandler.
+   * Otherwise one of nameNodeUri or rpcNamenode must be null.
    */
   @VisibleForTesting
   public DFSClient(URI nameNodeUri, ClientProtocol rpcNamenode,
       Configuration conf, FileSystem.Statistics stats)
     throws IOException {
-    SpanReceiverHost.get(conf, DFSConfigKeys.DFS_CLIENT_HTRACE_PREFIX);
+    SpanReceiverHost.get(conf, HdfsClientConfigKeys.DFS_CLIENT_HTRACE_PREFIX);
     traceSampler = new SamplerBuilder(TraceUtils.
-        wrapHadoopConf(DFSConfigKeys.DFS_CLIENT_HTRACE_PREFIX, conf)).build();
+        wrapHadoopConf(HdfsClientConfigKeys.DFS_CLIENT_HTRACE_PREFIX, conf))
+        .build();
     // Copy only the required DFSClient configuration
     this.dfsClientConf = new DfsClientConf(conf);
     this.conf = conf;
@@ -312,13 +314,13 @@ public class DFSClient implements java.io.Closeable, RemotePeerFactory,
         ThreadLocalRandom.current().nextInt()  + "_" +
         Thread.currentThread().getId();
     int numResponseToDrop = conf.getInt(
-        DFSConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY,
-        DFSConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT);
+        HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY,
+        HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT);
     ProxyAndInfo<ClientProtocol> proxyInfo = null;
     AtomicBoolean nnFallbackToSimpleAuth = new AtomicBoolean(false);
     if (numResponseToDrop > 0) {
       // This case is used for testing.
-      LOG.warn(DFSConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY
+      LOG.warn(HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY
           + " is set to " + numResponseToDrop
           + ", this hacked client will proactively drop responses");
       proxyInfo = NameNodeProxiesClient.createProxyWithLossyRetryHandler(conf,
@@ -344,7 +346,7 @@ public class DFSClient implements java.io.Closeable, RemotePeerFactory,
     }
 
     String localInterfaces[] =
-      conf.getTrimmedStrings(DFSConfigKeys.DFS_CLIENT_LOCAL_INTERFACES);
+      conf.getTrimmedStrings(HdfsClientConfigKeys.DFS_CLIENT_LOCAL_INTERFACES);
     localInterfaceAddrs = getLocalInterfaceAddrs(localInterfaces);
     if (LOG.isDebugEnabled() && 0 != localInterfaces.length) {
       LOG.debug("Using local interfaces [" +

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

@@ -49,8 +49,12 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
       HdfsClientConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY;
   public static final int     DFS_BYTES_PER_CHECKSUM_DEFAULT =
       HdfsClientConfigKeys.DFS_BYTES_PER_CHECKSUM_DEFAULT;
-  public static final String  DFS_USER_HOME_DIR_PREFIX_KEY = "dfs.user.home.dir.prefix";
-  public static final String  DFS_USER_HOME_DIR_PREFIX_DEFAULT = "/user";
+  @Deprecated
+  public static final String  DFS_USER_HOME_DIR_PREFIX_KEY =
+      HdfsClientConfigKeys.DFS_USER_HOME_DIR_PREFIX_KEY;
+  @Deprecated
+  public static final String  DFS_USER_HOME_DIR_PREFIX_DEFAULT =
+      HdfsClientConfigKeys.DFS_USER_HOME_DIR_PREFIX_DEFAULT;
   public static final String  DFS_CHECKSUM_TYPE_KEY = HdfsClientConfigKeys
       .DFS_CHECKSUM_TYPE_KEY;
   public static final String  DFS_CHECKSUM_TYPE_DEFAULT =
@@ -65,9 +69,9 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
   // HDFS HTrace configuration is controlled by dfs.htrace.spanreceiver.classes,
   // etc.
   public static final String  DFS_SERVER_HTRACE_PREFIX = "dfs.htrace.";
-
-  // HDFS client HTrace configuration.
-  public static final String  DFS_CLIENT_HTRACE_PREFIX = "dfs.client.htrace.";
+  @Deprecated
+  public static final String  DFS_CLIENT_HTRACE_PREFIX =
+      HdfsClientConfigKeys.DFS_CLIENT_HTRACE_PREFIX;
 
   // HA related configuration
   public static final String  DFS_DATANODE_RESTART_REPLICA_EXPIRY_KEY = "dfs.datanode.restart.replica.expiration";
@@ -1124,9 +1128,9 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
   @Deprecated
   public static final boolean DFS_CLIENT_USE_LEGACY_BLOCKREADERLOCAL_DEFAULT
       = HdfsClientConfigKeys.DFS_CLIENT_USE_LEGACY_BLOCKREADERLOCAL_DEFAULT;
-
-  public static final String  DFS_CLIENT_LOCAL_INTERFACES = "dfs.client.local.interfaces";
-
+  @Deprecated
+  public static final String  DFS_CLIENT_LOCAL_INTERFACES =
+      HdfsClientConfigKeys.DFS_CLIENT_LOCAL_INTERFACES;
 
   @Deprecated
   public static final String  DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC =
@@ -1135,10 +1139,12 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
   public static final boolean DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC_DEFAULT =
       HdfsClientConfigKeys.DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC_DEFAULT;
 
-  // The number of NN response dropped by client proactively in each RPC call.
-  // For testing NN retry cache, we can set this property with positive value.
-  public static final String  DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY = "dfs.client.test.drop.namenode.response.number";
-  public static final int     DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT = 0;
+  @Deprecated
+  public static final String  DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY =
+      HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY;
+  @Deprecated
+  public static final int     DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT =
+      HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT;
 
   @Deprecated
   public static final String  DFS_CLIENT_SLOW_IO_WARNING_THRESHOLD_KEY =

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

@@ -109,7 +109,7 @@ public class DistributedFileSystem extends FileSystem {
   private Path workingDir;
   private URI uri;
   private String homeDirPrefix =
-      DFSConfigKeys.DFS_USER_HOME_DIR_PREFIX_DEFAULT;
+      HdfsClientConfigKeys.DFS_USER_HOME_DIR_PREFIX_DEFAULT;
 
   DFSClient dfs;
   private boolean verifyChecksum = true;
@@ -145,9 +145,9 @@ public class DistributedFileSystem extends FileSystem {
       throw new IOException("Incomplete HDFS URI, no host: "+ uri);
     }
     homeDirPrefix = conf.get(
-        DFSConfigKeys.DFS_USER_HOME_DIR_PREFIX_KEY,
-        DFSConfigKeys.DFS_USER_HOME_DIR_PREFIX_DEFAULT);
-    
+        HdfsClientConfigKeys.DFS_USER_HOME_DIR_PREFIX_KEY,
+        HdfsClientConfigKeys.DFS_USER_HOME_DIR_PREFIX_DEFAULT);
+
     this.dfs = new DFSClient(uri, conf, statistics);
     this.uri = URI.create(uri.getScheme()+"://"+uri.getAuthority());
     this.workingDir = getHomeDirectory();

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileCreation.java

@@ -216,7 +216,7 @@ public class TestFileCreation {
       throws IOException {
     Configuration conf = new HdfsConfiguration();
     if (netIf != null) {
-      conf.set(DFSConfigKeys.DFS_CLIENT_LOCAL_INTERFACES, netIf);
+      conf.set(HdfsClientConfigKeys.DFS_CLIENT_LOCAL_INTERFACES, netIf);
     }
     conf.setBoolean(HdfsClientConfigKeys.DFS_CLIENT_USE_DN_HOSTNAME, useDnHostname);
     if (useDnHostname) {

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestLocalDFS.java

@@ -27,6 +27,7 @@ import java.io.IOException;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.junit.Test;
 
 /**
@@ -91,8 +92,8 @@ public class TestLocalDFS {
       // test home directory
       Path home = 
         fileSys.makeQualified(
-            new Path(DFSConfigKeys.DFS_USER_HOME_DIR_PREFIX_DEFAULT
-                + "/" + getUserName(fileSys))); 
+            new Path(HdfsClientConfigKeys.DFS_USER_HOME_DIR_PREFIX_DEFAULT
+                + "/" + getUserName(fileSys)));
       Path fsHome = fileSys.getHomeDirectory();
       assertEquals(home, fsHome);
 
@@ -110,7 +111,7 @@ public class TestLocalDFS {
     final String[] homeBases = new String[] {"/home", "/home/user"};
     Configuration conf = new HdfsConfiguration();
     for (final String homeBase : homeBases) {
-      conf.set(DFSConfigKeys.DFS_USER_HOME_DIR_PREFIX_KEY, homeBase);
+      conf.set(HdfsClientConfigKeys.DFS_USER_HOME_DIR_PREFIX_KEY, homeBase);
       MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build();
       FileSystem fileSys = cluster.getFileSystem();
       try {    

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

@@ -20,11 +20,11 @@ package org.apache.hadoop.hdfs.server.namenode;
 import java.io.IOException;
 
 import org.apache.hadoop.hdfs.DFSClient;
+import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants;
 import org.apache.hadoop.hdfs.server.namenode.ha.HATestUtil;
 import org.apache.hadoop.ipc.metrics.RetryCacheMetrics;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
@@ -60,7 +60,7 @@ public class TestNameNodeRetryCacheMetrics {
   public void setup() throws Exception {
     conf = new HdfsConfiguration();
     conf.setBoolean(DFS_NAMENODE_ENABLE_RETRY_CACHE_KEY, true);
-    conf.setInt(DFSConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY, 2);
+    conf.setInt(HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY, 2);
     cluster = new MiniDFSCluster.Builder(conf)
         .nnTopology(MiniDFSNNTopology.simpleHATopology()).numDataNodes(3)
         .build();

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

@@ -18,15 +18,15 @@
 package org.apache.hadoop.hdfs.server.namenode.ha;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.MiniDFSNNTopology;
+import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.junit.Test;
 
 /**
  * This test makes sure that when
- * {@link DFSConfigKeys#DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY} is set,
+ * {@link HdfsClientConfigKeys#DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY} is set,
  * DFSClient instances can still be created within NN/DN (e.g., the fs instance
  * used by the trash emptier thread in NN)
  */
@@ -39,8 +39,8 @@ public class TestLossyRetryInvocationHandler {
     
     // enable both trash emptier and dropping response
     conf.setLong("fs.trash.interval", 360);
-    conf.setInt(DFSConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY, 2);
-    
+    conf.setInt(HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY, 2);
+
     try {
       cluster = new MiniDFSCluster.Builder(conf)
           .nnTopology(MiniDFSNNTopology.simpleHATopology()).numDataNodes(0)

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/tracing/TestTracing.java

@@ -22,9 +22,9 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.apache.htrace.Sampler;
 import org.apache.htrace.Span;
 import org.apache.htrace.Trace;
@@ -189,7 +189,7 @@ public class TestTracing {
   public static void setup() throws IOException {
     conf = new Configuration();
     conf.setLong("dfs.blocksize", 100 * 1024);
-    conf.set(DFSConfigKeys.DFS_CLIENT_HTRACE_PREFIX +
+    conf.set(HdfsClientConfigKeys.DFS_CLIENT_HTRACE_PREFIX +
         SpanReceiverHost.SPAN_RECEIVERS_CONF_SUFFIX,
         SetSpanReceiver.class.getName());
   }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/tracing/TestTracingShortCircuitLocalRead.java

@@ -64,7 +64,7 @@ public class TestTracingShortCircuitLocalRead {
   public void testShortCircuitTraceHooks() throws IOException {
     assumeTrue(NativeCodeLoader.isNativeCodeLoaded() && !Path.WINDOWS);
     conf = new Configuration();
-    conf.set(DFSConfigKeys.DFS_CLIENT_HTRACE_PREFIX +
+    conf.set(HdfsClientConfigKeys.DFS_CLIENT_HTRACE_PREFIX +
         SpanReceiverHost.SPAN_RECEIVERS_CONF_SUFFIX,
         SetSpanReceiver.class.getName());
     conf.setLong("dfs.blocksize", 100 * 1024);