private static long logLongConfigurationUpdated(final String key, final long oldValue,
    final long newValue) {
    if (oldValue != newValue) {
      LOG.info("Updated configuration for key '{}' from {} to {}", key, oldValue, newValue);
    }
    return newValue;
  }
Consumes normalization request targets ({@link TableName}s) off the
{@link RegionNormalizerWorkQueue}, dispatches them to the {@link RegionNormalizer}, and executes
the resulting {@link NormalizationPlan}s.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/RegionNormalizerWorker.java