What is the replay option in pipelines

The Replay feature in Jenkins Pipeline is a powerful debugging and development tool that lets you modify and re-execute a previously completed pipeline run without altering the original job configuration or Jenkinsfile in source control . When you select a completed build from the build history and click the "Replay" button in the left menu, Jenkins opens an editor displaying the exact pipeline script that was used for that run, along with any shared library code that was referenced . This allows you to make temporary edits, test fixes, or experiment with changes before committing them to your repository .

Replay works by retrieving the pipeline script from a completed build and presenting it for modification. Once you make your changes and run the replay, Jenkins creates a new build (with a new build number) using your modified script . The feature preserves the original build's parameters and environment context, making it particularly useful for testing small logic changes, debugging failing stages, or experimenting with fixes before committing them to version control . You can even replay builds that are still in progress, as long as the original pipeline was syntactically correct and able to start .