In Java_sun_nio_fs_WindowsNativeDispatcher_FindFirstFile0, we have a special case where a handle obtained by FindFirstFileW has to be closed but is currently not closed. This could leak in seldom cases to leaks.
FindFirstFileW returns a handle in case of a successful call . However this handle has to be closed later (with FindClose, see MSDN docu). In the special case of failing (*env)->NewString(...) , we miss the closing.