throw new ThriftSecurityException(credentials.getPrincipal(), SecurityErrorCode.PERMISSION_DENIED);
List<TKeyExtent> failures = new ArrayList<TKeyExtent>();
for (Entry<TKeyExtent,Map<String,MapFileInfo>> entry : files.entrySet()) {
TKeyExtent tke = entry.getKey();
Map<String,MapFileInfo> fileMap = entry.getValue();
Map<FileRef,MapFileInfo> fileRefMap = new HashMap<FileRef,MapFileInfo>();
for (Entry<String,MapFileInfo> mapping : fileMap.entrySet()) {
Path path = new Path(mapping.getKey());
FileSystem ns = fs.getVolumeByPath(path).getFileSystem();