message: Subscribe only after updating.
diff: @@ -56,7 +56,12 @@ interface Props {
  export class OutputComponent extends React.Component<Props, {}> {
  componentDidMount() {
  - this.props.job.on("data", () => this.forceUpdate());
  + this.props.job.once("data", () => this.forceUpdate());
  + }
  +
  + componentDidUpdate() {
  + this.props.job.once("data", () => this.forceUpdate());
  +
  }
  render() {
  