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increase sqs message size limit to 1MiB #12957

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SethPyle376
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Motivation

This increases the SQS message and batch size limit to reflect the change AWS recently made. https://aws.amazon.com/about-aws/whats-new/2025/08/amazon-sqs-max-payload-size-1mib/

fixes #12956

Changes

Increases the size limit for SQS messages.

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localstack-bot commented Aug 5, 2025

All contributors have signed the CLA ✍️ ✅
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@SethPyle376
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I have read the CLA Document and I hereby sign the CLA

localstack-bot added a commit that referenced this pull request Aug 5, 2025
@thrau thrau added the semver: patch Non-breaking changes which can be included in patch releases label Aug 5, 2025
@baermat baermat self-assigned this Aug 12, 2025
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gregfurman commented Aug 15, 2025

Hey @SethPyle376 👋 Thanks for the PR! It looks like the snapshots didn't include corresponding AWS validations. Did you manually edit these or run and record your test output against AWS?

You can see some guides on how we write tests for our local emulator and maintain parity with AWS in the testing docs. In particular, I'd look at the parity testing docs.

Since this PR will definitely require re-recording AWS behaviour, I'll just run the necessary snapshot tests against AWS and update your feature branch with the corrected files. You'll retain full authorship of the PR since we squash commits anyway. Does that work for you? 🙂

cc @baermat

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@gregfurman that sounds great and would be much appreciated. Thanks!

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Successfully merging this pull request may close these issues.

bug: SQS messages larger than 256KiB are rejected
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