Path getSidelineDir() throws IOException {
    if (sidelineDir == null) {
      Path hbaseDir = CommonFSUtils.getRootDir(getConf());
      Path hbckDir = new Path(hbaseDir, HConstants.HBCK_SIDELINEDIR_NAME);
      sidelineDir = new Path(hbckDir, hbaseDir.getName() + "-" + startMillis);
    }
    return sidelineDir;
  }
Log an appropriate message about whether or not overlapping merges are computed in parallel.
hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java