Currently, on Windows the hadoop wrapper script (hadoop-config.cmd) assumes its the only place that uses JAVA_LIBRARY_PATH and initializes it to a blank line.
This prevents anyone from setting this outside of the hadoop wrapper (say hadoop-config.cmd) for their own native libraries.
The fix is pretty simple. Don't initialize it to '' and append the native libs like normal.
This is the same fix that was done for *nix as part of