private void logParallelMerge() {
    if (getConf().getBoolean("hbasefsck.overlap.merge.parallel", true)) {
      LOG.info("Handling overlap merges in parallel. set hbasefsck.overlap.merge.parallel to"
        + " false to run serially.");
    } else {
      LOG.info("Handling overlap merges serially.  set hbasefsck.overlap.merge.parallel to"
        + " true to run in parallel.");
    }
  }
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