public List<String> getChildren(String path, boolean watch)
    throws KeeperException, InterruptedException {
    return getChildren(path, null, watch);
  }
getChildren is an idempotent operation. Retry before throwing exception
@return List of children znodes
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java