setReplication debug log creates a new string even if debug is disabled

      if (oldBR > targetReplication) {
        FSDirectory.LOG.debug("Decreasing replication from {} to {} for {}",
                             oldBR, targetReplication, iip.getPath());
      } else if (oldBR < targetReplication) {
        FSDirectory.LOG.debug("Increasing replication from {} to {} for {}",
                             oldBR, targetReplication, iip.getPath());
      } else {
        FSDirectory.LOG.debug("Replication remains unchanged at {} for {}",
                             oldBR, iip.getPath());
      }
    }

  public String getPath() {
    if (pathname == null) {
      pathname = DFSUtil.byteArray2PathString(path);
    }
    return pathname;
  }