handle invalid bytes error

[chenghao-mou]

This should close #4530

Summary by CodeRabbit

• Bug Fixes
  • Improved reliability of AWS real-time streaming by enhancing error handling to automatically recover from transient connection issues.

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📝 Walkthrough

Walkthrough

This change adds exception handling for InvalidEventBytes from the smithy_aws_event_stream library to the realtime model's response processing method. The exception is now treated as a retryable error that triggers session restart, aligning with existing error recovery patterns.

Changes

Cohort / File(s)	Summary
Realtime Model Error Handling livekit/plugins/aws/experimental/realtime/realtime_model.py	Adds import of InvalidEventBytes and includes it in the retryable exception handler within _process_responses method to enable graceful recovery via session restart.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A stream hiccup, once a fatal blow,
Now catches gracefully and starts anew.
InvalidEventBytes won't steal the show—
The session restarts, fresh as morning dew! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'handle invalid bytes error' directly describes the main change: catching and handling the InvalidEventBytes exception as a recoverable error.
Linked Issues check	✅ Passed	The pull request fully implements the proposed solution from issue #4530 by importing InvalidEventBytes and adding it to the retryable exceptions caught in _process_responses().
Out of Scope Changes check	✅ Passed	All changes are directly scoped to resolving issue #4530; only the necessary import and exception handling logic were added.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

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📥 Commits

Reviewing files that changed from the base of the PR and between 6ad6e4b and ad61c57.

📒 Files selected for processing (1)

• livekit-plugins/livekit-plugins-aws/livekit/plugins/aws/experimental/realtime/realtime_model.py

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📓 Path-based instructions (1)

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Files:

• livekit-plugins/livekit-plugins-aws/livekit/plugins/aws/experimental/realtime/realtime_model.py

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🔇 Additional comments (2)

livekit-plugins/livekit-plugins-aws/livekit/plugins/aws/experimental/realtime/realtime_model.py (2)

1492-1503: Retryable handling for InvalidEventBytes looks correct.

Restarting the session and breaking the loop aligns with the recoverable-stream pattern and avoids reading from a potentially corrupted stream.

Please confirm via a repro or integration test that InvalidEventBytes is emitted on the output_stream.receive() path and that the restart path recovers cleanly.

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34-34: No changes needed. The InvalidEventBytes exception is properly exported from smithy_aws_event_stream==0.2.0 (pinned in uv.lock). The import at line 34 is valid and will not cause a runtime ImportError.

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