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[CP] Make sure session creation happens before starting agent (#38477)#38565

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damccorm merged 1 commit into
release-2.74from
users/damccorm/session-cp
May 21, 2026
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[CP] Make sure session creation happens before starting agent (#38477)#38565
damccorm merged 1 commit into
release-2.74from
users/damccorm/session-cp

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Preparing a CP in case we go to RC2


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* Make sure session creation happens before starting agent

* fix var

* Fix up

* Fix text parsing

* yapf
@damccorm damccorm marked this pull request as ready for review May 20, 2026 14:25
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Summary of Changes

Hello, 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 refactors the session management lifecycle within the Agent Development Kit (ADK) to ensure sessions are correctly initialized before agent invocation. By moving the session creation logic into the invocation step and adding validation for agent responses, the changes improve the robustness and reliability of the inference process.

Highlights

  • Session Management Refactoring: Moved session creation logic from the batch processing loop into the _invoke_agent method to ensure sessions are initialized just-in-time before agent execution.
  • Robust Session Handling: Implemented a check-then-create pattern for sessions using get_session before attempting creation, improving reliability.
  • Response Extraction Update: Updated response extraction to handle multi-part content and added explicit error raising when agents fail to return a valid response.
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@damccorm
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R: @Amar3tto

Since we need to go to RC2 anyways, I'd like to get this in

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Code Review

This pull request refactors session management by moving creation logic into _invoke_agent and updates response extraction to handle multi-part content. It also changes the error handling strategy to raise a ValueError when an agent fails to return a response. Feedback includes addressing potential race conditions and broad exception handling in session creation, ensuring consistency between the new error-raising behavior and the function's documentation/type hints, and optimizing string joining for better memory efficiency.

Comment thread sdks/python/apache_beam/ml/inference/agent_development_kit.py
Comment thread sdks/python/apache_beam/ml/inference/agent_development_kit.py
Comment thread sdks/python/apache_beam/ml/inference/agent_development_kit.py
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Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control. If you'd like to restart, comment assign set of reviewers

@damccorm damccorm changed the title Make sure session creation happens before starting agent (#38477) [CP] Make sure session creation happens before starting agent (#38477) May 21, 2026
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R: @Abacn as well

@damccorm damccorm added this to the 2.74.0 Release milestone May 21, 2026
@damccorm damccorm merged commit c372714 into release-2.74 May 21, 2026
130 of 141 checks passed
@damccorm damccorm deleted the users/damccorm/session-cp branch May 21, 2026 14:20
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