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Upgrade PySpark from Spark 3.5 to Spark 4.0 with AWS Spark Upgrade Agent

calendar_today June 9, 2026 person Prasad Nadig domain amazon-datazone

In this post, we walk through a hands-on PySpark migration from Spark 3.5 to Spark 4.0 on Amazon EMR Serverless, using the AWS Spark Upgrade Agent. You’ll see how the agent iteratively validates your application on a live Amazon EMR Serverless application, automatically diagnosing and resolving failures from Amazon CloudWatch logs until the job succeeds.

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