[Tanmay-Ts]

Issue number: closes #8597

Summary

Changes

• _get_parameters_by_name now catches any exception from the GetParameters request. With raise_on_error=True it raises GetParameterError (chained with from exc, so the botocore error is available as __cause__). With raise_on_error=False it returns the request's names, which end up under _errors.
• Previously only InvalidKeyId and InternalServerError were caught, so throttling or any other ClientError escaped raw in both modes.
• fix(parameters): raise GetParameterError when GetParameters fails in fail-fast mode #8616 already made InvalidKeyId and InternalServerError raise GetParameterError in fail-fast mode. This PR keeps its Failed to fetch parameters: [...] message and appends the botocore error, so the cause is visible without reading __cause__.
• Per-parameter failures reported in InvalidParameters are unchanged; only request-level failures are affected.
• This applies to every GetParameters request get_parameters_by_name makes: all-decrypt batches, non-decrypt batches, and the non-decrypted subset of a mixed batch. The decrypted subset of a mixed batch goes through get(), which already wraps errors.

Tests added in tests/functional/parameters/_boto3/test_utilities_parameters.py:

• Fail-fast: ThrottlingException, InvalidKeyId and InternalServerError, each with decrypt=False and decrypt=True, asserting GetParameterError and the exact Names / WithDecryption sent.
• Graceful: 11 parameters fetched in two chunks, the first returning one InvalidParameters entry and the second throttled. Asserts _errors == [invalid, throttled] and that the successful values are kept.

On current develop, the throttling cases and the graceful test fail because the ClientError escapes. The InvalidKeyId and InternalServerError cases already raise there since #8616 and fail only because the message doesn't name the error code. With this change, pytest tests/functional/parameters → 190 passed.

User experience

Before:

provider.get_parameters_by_name({"/a": {}})                        # raw botocore ClientError (throttling)
provider.get_parameters_by_name({"/a": {}}, raise_on_error=False)  # raw botocore ClientError (throttling)

After:

provider.get_parameters_by_name({"/a": {}})                        # GetParameterError
provider.get_parameters_by_name({"/a": {}}, raise_on_error=False)  # {"_errors": ["/a"]}

---

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[leandrodamascena]

Thanks @Tanmay-Ts, nice follow-up to #8616. That one only covered the two exceptions we knew about, and you're right that throttling or anything else still escaped raw from the batch path while get() wrapped everything. I tried it against real Parameter Store with an access denied, a dead endpoint and bad credentials, and all three now come back as GetParameterError or under _errors, as the docs say they should. Having the botocore message in the error text is a good call too.

I'm approving now. This goes out in 3.39.0, so it will sit here for a while before I merge it. No rebase needed in the meantime, and you'll be credited in the release notes.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.94%. Comparing base (b51badc) to head (072f97d).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8617      +/-   ##
===========================================
- Coverage    96.95%   96.94%   -0.02%     
===========================================
  Files          321      321              
  Lines        16251    16251              
  Branches      1453     1453              
===========================================
- Hits         15756    15754       -2     
- Misses         353      354       +1     
- Partials       142      143       +1     

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[boring-cyborg]

Awesome work, congrats on your first merged pull request and thank you for helping improve everyone's experience!

[powertools-for-aws-oss-automation]

Awesome work, congrats on your first merged pull request and thank you for helping improve everyone's experience!