private void initFile() {
    try {
      setupOutputFileStreams();
    } catch (IOException e) {
      throw new RuntimeException("Failed to create temporary output file on disk", e);
    }
  }
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