Upgrading Lambda to nodejs18.x or later? AWS SDK v2 is no longer bundled. The exact error, why it happens, and a complete guide to migrating to @aws-sdk v3 modular clients.
If you upgraded a Lambda function from nodejs16.x to nodejs18.x (or nodejs20.x / nodejs22.x) and your logs now show:
Runtime.ImportModuleError: Error: Cannot find module 'aws-sdk'
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you're not missing a locally installed package. AWS deliberately stopped bundling it.
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