@Override
  public ReplicationPeerConfig getPeerConfig(String peerId) throws ReplicationException {
    byte[] data;
    try {
      data = ZKUtil.getData(zookeeper, getPeerNode(peerId));
    } catch (KeeperException | InterruptedException e) {
      throw new ReplicationException("Error getting configuration for peer with id=" + peerId, e);
    }
    if (data == null || data.length == 0) {
      throw new ReplicationException(
        "Replication peer config data shouldn't be empty, peerId=" + peerId);
    }
    try {
      return ReplicationPeerConfigUtil.parsePeerFrom(data);
    } catch (DeserializationException e) {
      throw new ReplicationException(
        "Failed to parse replication peer config for peer with id=" + peerId, e);
    }
  }
The name of the znode that contains a list of all remote slave (i.e. peer) clusters.
hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ZKReplicationPeerStorage.java