Failed to run examples/11_llm_integration/multi_agent_workflow.py

[k24d]

It seems 11_llm_integration/multi_agent_workflow.py is broken.

Import error

This caused an import error. Changing google.adk.types to google.adk.agents worked.

graflow/examples/11_llm_integration/multi_agent_workflow.py

Line 106 in cc0fe75

from google.adk.types import LlmAgent # type: ignore

Unexpected keyword argument

This caused an argument error. Changing llm to llm_client worked.

graflow/examples/11_llm_integration/multi_agent_workflow.py

Line 187 in cc0fe75

def review_phase(llm: LLMClient):

Async errors

Still I observed some async-related errors and warnings like these, although I haven't checked details:

RuntimeError: Task <Task pending name='Task-20' coro=<AsyncClient.aclose() running at /Users/keisuke.nishida/graflow/.venv/lib/python3.13/site-packages/google/genai/client.py:243>> got Future <Task pending name='Task-21' coro=<_wait_for_close() running at /Users/keisuke.nishida/graflow/.venv/lib/python3.13/site-packages/aiohttp/connector.py:136>> attached to a different loop

task: <Task pending name='Task-21' coro=<_wait_for_close() running at /Users/keisuke.nishida/graflow/.venv/lib/python3.13/site-packages/aiohttp/connector.py:136>>
/Users/keisuke.nishida/.local/share/uv/python/cpython-3.13.3-macos-aarch64-none/lib/python3.13/asyncio/base_events.py:744: RuntimeWarning: coroutine '_wait_for_close' was never awaited

[myui]

@k24d thank you for reporting!

This bug was due to throwing ValueError when langfuse credentials are missing for litellm tracing instrumentation.
It should work without tracing and fixed in this commit 5c8a2b0#diff-e2e562917bdfbecc201fd9edd091bf8dd7443421b015002daca9bb364d11de2cL214

It remains a warning of "coroutine was never awaited" due to a unresolved issue of ADK
google/adk-python#3577
but it should work now.

[myui]

Please confirm it runs or not on your environment. Thanks!

[myui]

Note;

• The warnings are caused by genai.AsyncClient.del trying to schedule cleanup tasks on a closed event loop (known issue in AsyncClient resource cleanup creates unawaited asyncio tasks googleapis/python-genai#1709)
• Since asyncio.run() creates a temporary event loop that closes immediately, we suppress the harmless warnings
• This is a pragmatic workaround until Google fixes it upstream in feat: Add LLM resource cleanup lifecycle with aclose() method google/adk-python#3577

[myui]

Please reopen this issue if the fix does not work. Thanks.