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Fix Lambda CI log pollution issues#13546

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joe4dev merged 1 commit into
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fix-lambda-ci-log-pollution
Dec 19, 2025
Merged

Fix Lambda CI log pollution issues#13546
joe4dev merged 1 commit into
mainfrom
fix-lambda-ci-log-pollution

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@joe4dev

@joe4dev joe4dev commented Dec 18, 2025

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Motivation

Our CI logs are very noisy, including many avoidable WARNING and ERROR messages, making it difficult to debug real issues. In particular:

  • 57 errors and stack traces leaking into other tests from an ESM poller that is not shut down properly:

localstack.services.lambda_.event_source_mapping.esm_worker : Error while polling messages for event source arn:aws:dynamodb:us-east-1:000000000000:table/table-612184b5/stream/2025-12-15T05:07:00.383: An error occurred (ResourceNotFoundException) when calling the DescribeStream operation: Requested resource not found: Stream: arn:aws:dynamodb:us-east-1:000000000000:table/table-612184b5/stream/2025-12-15T05:07:00.383 not found

  • DEBUG: DeleteEventSourceMapping operation: The resource you requested does not exist. gets logged 27 times

Changes

  • Use ESM fixture and fix cleanups (due to lifecycle timings) for test_create_event_filter_criteria_validation
  • Fix unnecessary DeleteEventSourceMapping debug log by catching the ResourceNotFoundException in the fixture. There is no need to delete something that doesn't exist :)
  • Remove some unnecessary parameters (LoggingConfig, MemorySize, Timeout) from Lambda runtime validation tests

Related

Discovered during AI Winter hackathon :)

@joe4dev joe4dev added this to the 4.13 milestone Dec 18, 2025
@joe4dev joe4dev self-assigned this Dec 18, 2025
@joe4dev joe4dev added semver: patch Non-breaking changes which can be included in patch releases docs: skip Pull request does not require documentation changes notes: skip Pull request does not have to be mentioned in the release notes labels Dec 18, 2025
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Test Results - Preflight, Unit

22 982 tests  ±0   21 140 ✅ ±0   6m 1s ⏱️ -1s
     1 suites ±0    1 842 💤 ±0 
     1 files   ±0        0 ❌ ±0 

Results for commit 397324c. ± Comparison against base commit b613fb9.

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Test Results (amd64) - Acceptance

7 tests  ±0   5 ✅ ±0   2m 58s ⏱️ -3s
1 suites ±0   2 💤 ±0 
1 files   ±0   0 ❌ ±0 

Results for commit 397324c. ± Comparison against base commit b613fb9.

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Test Results (amd64) - Integration, Bootstrap

    5 files      5 suites   2h 41m 26s ⏱️
5 555 tests 4 997 ✅ 558 💤 0 ❌
5 561 runs  4 997 ✅ 564 💤 0 ❌

Results for commit 397324c.

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LocalStack Community integration with Pro

    2 files  ±0      2 suites  ±0   1h 57m 2s ⏱️ + 1m 57s
5 153 tests ±0  4 756 ✅ ±0  397 💤 ±0  0 ❌ ±0 
5 155 runs  ±0  4 756 ✅ ±0  399 💤 ±0  0 ❌ ±0 

Results for commit 397324c. ± Comparison against base commit b613fb9.

@joe4dev joe4dev marked this pull request as ready for review December 19, 2025 09:19
gregfurman
gregfurman approved these changes Dec 19, 2025
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@gregfurman gregfurman left a comment

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LGTM!

Comment thread localstack-core/localstack/testing/pytest/fixtures.py
Comment on lines +1550 to +1551
except aws_client.lambda_.exceptions.ResourceNotFoundException:
pass

@gregfurman gregfurman Dec 19, 2025

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praise: Can't believe this is all it takes to declutter our logs 🫠

@joe4dev joe4dev merged commit 056da83 into main Dec 19, 2025
55 checks passed
@joe4dev joe4dev deleted the fix-lambda-ci-log-pollution branch December 19, 2025 10:27
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@dominikschubert dominikschubert Awaiting requested review from dominikschubert dominikschubert is a code owner

@dfangl dfangl Awaiting requested review from dfangl

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@gregfurman gregfurman gregfurman approved these changes

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docs: skip Pull request does not require documentation changes notes: skip Pull request does not have to be mentioned in the release notes semver: patch Non-breaking changes which can be included in patch releases

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@joe4dev @gregfurman