private void createIfZNodeNotExists(String path) {
    try {
      if (zk.exists(path, false) == null) {
        createZNode(path, new byte[0]);
      }
    } catch (KeeperException | InterruptedException e) {
      LOG.error("Error checking given node : " + path + " " + e);
    }
  }
Checks if given ZNode exists, if not creates a PERSISTENT ZNODE for same.
@param path Path to check for ZNode
hbase-it/src/main/java/org/apache/hadoop/hbase/chaos/ChaosAgent.java