fix(server): Improve event consumer error handling#282
fix(server): Improve event consumer error handling#282holtskinner merged 4 commits intoa2aproject:mainfrom
Conversation
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
There was a problem hiding this comment.
Summary of Changes
Hello @pankaj-bind, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request enhances the robustness of the event consumer by introducing specific error handling for pydantic.ValidationError. The primary goal is to prevent the consumer from crashing due to malformed events, ensuring continuous and reliable processing of the event stream by logging validation issues and continuing execution.
Highlights
- Improved Error Handling: The event consumer's
consume_allmethod now specifically catchespydantic.ValidationError. This prevents the consumer from crashing when it encounters an event with an invalid format, allowing it to gracefully handle such situations. - Enhanced Reliability: Upon catching a
ValidationError, the consumer logs the error message and continues processing the event stream. This ensures that a single malformed event does not halt the entire consumption process, significantly improving the reliability of the event stream processing. - New Test Coverage: A new asynchronous test case,
test_consume_all_handles_validation_error, has been added. This test simulates aValidationErrorduring event dequeuing and asserts that the error is logged correctly and that the consumer continues its operation, verifying the new error handling logic.
Using Gemini Code Assist
The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.
Invoking Gemini
You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.
| Feature | Command | Description |
|---|---|---|
| Code Review | /gemini review |
Performs a code review for the current pull request in its current state. |
| Pull Request Summary | /gemini summary |
Provides a summary of the current pull request in its current state. |
| Comment | @gemini-code-assist | Responds in comments when explicitly tagged, both in issue comments and review comments. |
| Help | /gemini help |
Displays a list of available commands. |
Customization
To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.
Limitations & Feedback
Gemini Code Assist is currently in preview and may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments to provide feedback.
You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.
Footnotes
-
Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩
There was a problem hiding this comment.
Code Review
This pull request enhances the event consumer's resilience by implementing specific error handling for pydantic.ValidationError. The consumer now logs validation errors and continues processing, preventing disruptions from malformed events. A test case has been added to verify this behavior, and a suggestion has been provided to enhance the test's comprehensiveness.
holtskinner
changed the title
🤖 I have created a release *beep* *boop* --- ## [0.2.12](v0.2.11...v0.2.12) (2025-07-14) ### Features * add `metadata` property to `RequestContext` ([#302](#302)) ([e781ced](e781ced)) * add A2ABaseModel ([#292](#292)) ([24f2eb0](24f2eb0)) * add support for notification tokens in PushNotificationSender ([#266](#266)) ([75aa4ed](75aa4ed)) * Update A2A types from specification 🤖 ([#289](#289)) ([ecb321a](ecb321a)) ### Bug Fixes * add proper a2a request body documentation to Swagger UI ([#276](#276)) ([4343be9](4343be9)), closes [#274](#274) * Handle asyncio.cancellederror and raise to propagate back ([#293](#293)) ([9d6cb68](9d6cb68)) * Improve error handling in task creation ([#294](#294)) ([6412c75](6412c75)) * Resolve dependency issue with sql stores ([#303](#303)) ([2126828](2126828)) * Send push notifications for message/send ([#298](#298)) ([0274112](0274112)) * **server:** Improve event consumer error handling ([#282](#282)) ([a5786a1](a5786a1)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
2 participants
Description
Enhances the event consumer to gracefully handle
pydantic.ValidationErrorby logging the error and continuing execution instead of crashing. This improves the reliability of the event stream processing.Changes:
src/a2a/server/events/event_consumer.py: Added specificexceptblock forValidationError.tests/server/events/test_event_consumer.py: Added a test case to verify the new error handling logic.Thank you for opening a Pull Request!
Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
CONTRIBUTINGGuide.fix:which represents bug fixes, and correlates to a SemVer patch.feat:represents a new feature, and correlates to a SemVer minor.feat!:, orfix!:,refactor!:, etc., which represent a breaking change (indicated by the!) and will result in a SemVer major.nox -s formatfrom the repository root to format)