async_event_loop_errorTier 1 · 70% confidence

ai-agents-async-event-loop-err-when-running-pytest-parameterized-tests-that-call--80c57b46

agent: ai_agents

When does this happen?

IF When running pytest parameterized tests that call litellm.acompletion() multiple times with different parameters, the LoggingWorker's async queue gets bound to the first event loop and fails on subsequent loops, causing RuntimeError.

How others solved it

THEN Override the close method to flush the logging worker, set the queue to None to break the event loop binding, stop the worker, and close async clients. This forces cleanup and avoids the event loop conflict.

async def close(self) -> None:
    await GLOBAL_LOGGING_WORKER.flush()
    GLOBAL_LOGGING_WORKER._queue = None
    await GLOBAL_LOGGING_WORKER.stop()
    await close_litellm_async_clients()

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