@Override
  public boolean hasHttp2Port() {
    return ports.containsKey(PortType.HTTP2);
  }
Gets the DataNode's SSL port number.

@return Port number upon which to establish an SSL encrypted connection with the DataNodeId.
@throws IllegalStateException Thrown if no SSL port exists.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/DataNode.java