private void addSkippedRegion(final HbckRegionInfo hbi) {
    Set<String> skippedRegionNames = skippedRegions.get(hbi.getTableName());
    if (skippedRegionNames == null) {
      skippedRegionNames = new HashSet<>();
    }
    skippedRegionNames.add(hbi.getRegionNameAsString());
    skippedRegions.put(hbi.getTableName(), skippedRegionNames);
  }
Check consistency of all regions using multiple threads concurrently.
hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java