@Override
  public String[] getMasterKeys() {
    try {
      Map<Integer, byte[]> allKeys = getAllKeys();
      String[] result = new String[allKeys.size()];
      int resultIdx = 0;
      for (byte[] keyBytes : allKeys.values()) {
          result[resultIdx++] = new String(keyBytes);
      }
      return result;
    } catch (KeeperException ex) {
      throw new TokenStoreException(ex);
    } catch (InterruptedException ex) {
      throw new TokenStoreException(ex);
    }
  }
Parse comma separated list of ACL entries to secure generated nodes, e.g.
<code>sasl:hive/host1@MY.DOMAIN:cdrwa,sasl:hive/host2@MY.DOMAIN:cdrwa</code>
@param aclString
@return ACL list
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/security/ZooKeeperTokenStore.java