public Output getOutputForRowBytes() {
    if (!isOpen) {
      initFile();
      isOpen = true;
    }
    // Reserve space for the int length.
    output.reserve(4);
    rowBeginPos = output.getLength();
    return output;
  }
An eager bytes container that puts row bytes to an output stream.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/rowbytescontainer/VectorRowBytesContainer.java