@Override
  public void nodeChildrenChanged(String path) {
    if (!path.equals(watcher.getZNodePaths().baseZNode)) {
      return;
    }
    loadMetaLocationsFromZk(retryCounterFactory.create(), ZNodeOpType.CHANGED);
  }
Helper to check if the given 'path' corresponds to a meta znode. This listener is only
interested in changes to meta znodes.
hbase-server/src/main/java/org/apache/hadoop/hbase/MetaRegionLocationCache.java