@Override
  public void write(byte[] buf, int off, int len) {
    writeBuffer.write(buf, off, len);
  }
When copyBinary flag is true, the transport will copy the binary data from the underlying.
This is a protection for the underlying buffer to be reused by the caller protocol.
iotdb-client/service-rpc/src/main/java/org/apache/iotdb/rpc/TElasticFramedTransport.java