public void setRemoteEndpoint(TEndPoint remoteEndpoint) {
    this.remoteEndpoint = remoteEndpoint;
  }
This class contains the basic information we needed of the target ISourceHandle.

@param remoteEndpoint Hostname and Port of the remote fragment instance where the data blocks
    should be sent to.
@param remoteFragmentInstanceId The ID of the remote fragment instance.
@param remotePlanNodeId The plan node ID of the remote exchangeNode.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/exchange/sink/DownStreamChannelLocation.java