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fix: match invalid checkpoint token casing #723

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Merged
hln33 merged 2 commits into from
Sep 15, 2026
+4 −4
Merged

fix: match invalid checkpoint token casing #723

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cf53cef
fix: match invalid checkpoint token casing
vyrnsynx Sep 13, 2026
3025b34
fix: use exact Invalid checkpoint token match
vyrnsynx Sep 15, 2026
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4 changes: 2 additions & 2 deletions packages/aws-durable-execution-sdk-python/src/aws_durable_execution_sdk_python/exceptions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@
TOO_MANY_REQUESTS_ERROR: int = 429
SERVICE_ERROR: int = 500
INVALID_PARAMETER_VALUE_EXCEPTION: str = "InvalidParameterValueException"
INVALID_CHECKPOINT_TOKEN_PREFIX: str = "Invalid Checkpoint Token"
INVALID_CHECKPOINT_TOKEN_PREFIX: str = "Invalid checkpoint token"

# Non-retryable customer error codes that arrive as non-4xx (e.g. HTTP 502) from Lambda.
# Unlike typical 5xx errors, these require customer intervention (e.g., fixing
Expand Down Expand Up @@ -162,7 +162,7 @@ def _classify_error_category(
These arrive as HTTP 502 but require customer intervention to fix.
- 4xx errors → EXECUTION, except:
- 429 (TooManyRequests) → INVOCATION (throttling is transient)
- InvalidParameterValueException with "Invalid Checkpoint Token" → INVOCATION
- InvalidParameterValueException with "Invalid checkpoint token" (exact match) → INVOCATION
(stale token from a concurrent checkpoint; next invocation gets a fresh token)
- 5xx, network errors → INVOCATION
"""
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4 changes: 2 additions & 2 deletions packages/aws-durable-execution-sdk-python/tests/exceptions_test.py
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Expand Up @@ -66,11 +66,11 @@ def test_checkpoint_error():


def test_checkpoint_error_classification_invalid_token_invocation():
"""Test 4xx InvalidParameterValueException with Invalid Checkpoint Token is invocation error."""
"""Test 4xx InvalidParameterValueException with "Invalid checkpoint token" error message is an invocation error."""
error_response = {
"Error": {
"Code": "InvalidParameterValueException",
"Message": "Invalid Checkpoint Token: token expired",
"Message": "Invalid checkpoint token: token expired",
},
"ResponseMetadata": {"HTTPStatusCode": 400},
}
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