How does the bridge between the raw S3 bucket and the first Glue job work, and how does the first Glue job trigger the second Glue job? What events are involved?
💡 Model Answer
The bridge starts with an S3 event notification: when a new file lands in the raw bucket, S3 can publish an event to EventBridge. You create an EventBridge rule that matches the S3 event pattern and sets the first Glue job as the target. Glue then starts the job automatically. Inside the first Glue job, after processing is complete, you can either trigger the second job directly by calling the Glue StartJobRun API or publish another event to EventBridge. If you publish an event, you set up a second EventBridge rule that listens for that event and starts the second Glue job. This two‑step chain ensures that the second job runs only after the first finishes. The events involved are the S3 ObjectCreated event, the EventBridge rule that triggers the first job, and the custom event (or direct API call) that triggers the second job.
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