HDFS-8539. Hdfs doesnt have class debug in windows. Contributed by Anu Engineer.

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

@@ -861,6 +861,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-8463. Calling DFSInputStream.seekToNewSource just after stream creation
     causes NullPointerException (Masatake Iwasaki via kihwal)
 
+    HDFS-8539. Hdfs doesnt have class 'debug' in windows.
+    (Anu Engineer via cnauroth)
+
 Release 2.7.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/hdfs.cmd

@@ -59,7 +59,7 @@ if "%1" == "--loglevel" (
     )
   )
 
-  set hdfscommands=dfs namenode secondarynamenode journalnode zkfc datanode dfsadmin haadmin fsck balancer jmxget oiv oev fetchdt getconf groups snapshotDiff lsSnapshottableDir cacheadmin mover storagepolicies classpath crypto
+  set hdfscommands=dfs namenode secondarynamenode journalnode zkfc datanode dfsadmin haadmin fsck balancer jmxget oiv oev fetchdt getconf groups snapshotDiff lsSnapshottableDir cacheadmin mover storagepolicies classpath crypto debug
   for %%i in ( %hdfscommands% ) do (
     if %hdfs-command% == %%i set hdfscommand=true
   )
@@ -179,6 +179,11 @@ goto :eof
   set CLASS=org.apache.hadoop.hdfs.tools.CryptoAdmin
   goto :eof
 
+:debug
+  set CLASS=org.apache.hadoop.hdfs.tools.DebugAdmin
+  goto :eof
+
+
 @rem This changes %1, %2 etc. Hence those cannot be used after calling this.
 :make_command_arguments
   if "%1" == "--config" (
@@ -237,4 +242,5 @@ goto :eof
   @echo.
   @echo Most commands print help when invoked w/o parameters.
 
+@rem There are also debug commands, but they don't show up in this listing.
 endlocal