3.41.0

Issues

• Bug: DataclassSerializer cannot save datetime/UUID fields and does not rebuild nested dataclasses on replay

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8723 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  5

  

• Bug: Redis orphan lock timeout ignores expires_after_seconds and is always 10 seconds

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8726 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  4

  

• Bug: POWERTOOLS_IDEMPOTENCY_DISABLED set to an empty or non-boolean value crashes every invocation

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8728 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  4

  

• Docs: IdempotencyConfig docstring says local_cache_max_items defaults to 1024, it is 256

  documentationgood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8729 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  5

  

• docs(idempotency): fix local_cache_max_items default in IdempotencyConfig docstring

  size/XS
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  aws-powertools/powertools-lambda-python#8731·lechakrawarthy opened Oct 31, 2026 · Updated Nov 10, 2026
  3

  

• fix(idempotency): treat empty or unparsable POWERTOOLS_IDEMPOTENCY_DISABLED as not disabled

  size/Mtests
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  aws-powertools/powertools-lambda-python#8734·lechakrawarthy opened Nov 1, 2026 · Updated Nov 14, 2026
  3

  

• fix(idempotency): compute the Redis orphan lock timeout from the configured expiry

  size/Mtests
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  aws-powertools/powertools-lambda-python#8779·CJstate opened Nov 9, 2026 · Updated Nov 10, 2026
  5

  

• Bug: a NaN or infinite metric value makes the whole EMF line invalid JSON

  bugmetrics
  aws-powertools/powertools-lambda-python#8796 · Filter by author anishmehta24 opened on Nov 10, 2026 · 3.41.0
  1

  

• fix(metrics): skip non-finite metric values with a warning

  documentationmetricssize/Mtests
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  aws-powertools/powertools-lambda-python#8797·anishmehta24 opened Nov 10, 2026 · Updated Nov 14, 2026
  5

  

• Bug: thread_safe_remove_keys in one thread or task removes the key everywhere that copied the context

  buglogger
  aws-powertools/powertools-lambda-python#8771 · Filter by author haeganm opened on Nov 4, 2026 · 3.41.0
  2

  

• fix(logger): copy thread-local keys in thread_safe_remove_keys

  bugloggersize/Mtests
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  aws-powertools/powertools-lambda-python#8772·haeganm opened Nov 4, 2026 · Updated Nov 14, 2026
  2