HADOOP-11247. Fix a couple javac warnings in NFS. Contributed by Brandon Li.

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -33,6 +33,8 @@ Release 2.7.0 - UNRELEASED
     HADOOP-11186. documentation should talk about
     hadoop.htrace.spanreceiver.classes, not hadoop.trace.spanreceiver.classes (cmccabe)
 
+    HADOOP-11247. Fix a couple javac warnings in NFS. (Brandon Li via wheat9)
+
 Release 2.6.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/IdMappingConstant.java

@@ -32,5 +32,5 @@ public class IdMappingConstant {
   
   // Used for finding the configured static mapping file.
   public static final String STATIC_ID_MAPPING_FILE_KEY = "static.id.mapping.file";
-  public static final String STATIC_ID_MAPPING_FILE_DEFAULT = "/etc/usergroupid.map";
+  public static final String STATIC_ID_MAPPING_FILE_DEFAULT = "/etc/nfs.map";
 }

hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/nfs/nfs3/Nfs3Constant.java

@@ -193,12 +193,4 @@ public class Nfs3Constant {
   /** Expiration time for nfs exports cache entry */
   public static final String NFS_EXPORTS_CACHE_EXPIRYTIME_MILLIS_KEY = "nfs.exports.cache.expirytime.millis";
   public static final long NFS_EXPORTS_CACHE_EXPIRYTIME_MILLIS_DEFAULT = 15 * 60 * 1000; // 15 min
-
-  @Deprecated
-  public final static String NFS_USERGROUP_UPDATE_MILLIS_KEY = "nfs.usergroup.update.millis";
-  
-  // Used for finding the configured static mapping file.
-  @Deprecated
-  public static final String NFS_STATIC_MAPPING_FILE_KEY = "nfs.static.mapping.file";
-  public static final String NFS_STATIC_MAPPING_FILE_DEFAULT = "/etc/nfs.map";
 }

hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/conf/NfsConfiguration.java

@@ -43,9 +43,9 @@ public class NfsConfiguration extends HdfsConfiguration {
             Nfs3Constant.NFS_EXPORTS_CACHE_EXPIRYTIME_MILLIS_KEY),
         new DeprecationDelta("hadoop.nfs.userupdate.milly",
             IdMappingConstant.USERGROUPID_UPDATE_MILLIS_KEY),
-        new DeprecationDelta(Nfs3Constant.NFS_USERGROUP_UPDATE_MILLIS_KEY,
+        new DeprecationDelta("nfs.usergroup.update.millis",
             IdMappingConstant.USERGROUPID_UPDATE_MILLIS_KEY),
-        new DeprecationDelta(Nfs3Constant.NFS_STATIC_MAPPING_FILE_KEY,
+        new DeprecationDelta("nfs.static.mapping.file",
             IdMappingConstant.STATIC_ID_MAPPING_FILE_KEY),
         new DeprecationDelta("dfs.nfs3.enableDump",
             NfsConfigKeys.DFS_NFS_FILE_DUMP_KEY),

hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/RpcProgramNfs3.java

@@ -174,7 +174,7 @@ public class RpcProgramNfs3 extends RpcProgram implements Nfs3Interface {
     this.config = config;
     config.set(FsPermission.UMASK_LABEL, "000");
     iug = new ShellBasedIdMapping(config,
-        Nfs3Constant.NFS_STATIC_MAPPING_FILE_DEFAULT);
+        IdMappingConstant.STATIC_ID_MAPPING_FILE_DEFAULT);
 
     aixCompatMode = config.getBoolean(
         NfsConfigKeys.AIX_COMPAT_MODE_KEY,