fix: prevent orphan SUBMITTED rows when producer fails early#1110
fix: prevent orphan SUBMITTED rows when producer fails early#1110Linux2010 wants to merge 5 commits into
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…ect#1067) - Add initial_message parameter to ActiveTaskRegistry.get_or_create() - Pass params.message from DefaultRequestHandlerV2._setup_active_task - Explicitly transition to FAILED state in _run_producer exception handler This fixes a race condition where tasks could be persisted as SUBMITTED with empty history when AgentExecutor.execute() raises before emitting any events. Fixes a2aproject#1067
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This pull request addresses an issue where orphan SUBMITTED task rows are left behind when an exception occurs before any events are emitted by explicitly transitioning the task to a FAILED state in the producer exception handler. It also propagates the initial_message parameter when retrieving or creating an active task. The review feedback correctly identifies that the newly created TaskStatusUpdateEvent is missing a context_id, which would trigger an InvalidParamsError during validation in TaskManager.save_task_event. It is recommended to explicitly set the context_id on the event and add a corresponding assertion in the unit tests to prevent future regressions.
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| failed_event = TaskStatusUpdateEvent( | ||
| task_id=self._task_id, | ||
| status=failed_status, | ||
| ) |
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The TaskStatusUpdateEvent is created without a context_id. However, TaskManager.save_task_event validates that the event's context_id matches the TaskManager's context_id (which was just set to request_context.context_id or '' via ensure_task_id). If they do not match, save_task_event raises an InvalidParamsError.
To prevent this validation error from crashing the exception handler and bypassing the enqueuing of the original exception, we should explicitly set the context_id in the TaskStatusUpdateEvent.
| failed_event = TaskStatusUpdateEvent( | |
| task_id=self._task_id, | |
| status=failed_status, | |
| ) | |
| failed_event = TaskStatusUpdateEvent( | |
| task_id=self._task_id, | |
| context_id=request_context.context_id or '', | |
| status=failed_status, | |
| ) |
| event = last_call.args[0] | ||
| assert isinstance(event, TaskStatusUpdateEvent) | ||
| assert event.status.state == TaskState.TASK_STATE_FAILED |
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Add an assertion to verify that the context_id is correctly set on the TaskStatusUpdateEvent to prevent regression where context_id is missing and causes InvalidParamsError in production.
| event = last_call.args[0] | |
| assert isinstance(event, TaskStatusUpdateEvent) | |
| assert event.status.state == TaskState.TASK_STATE_FAILED | |
| event = last_call.args[0] | |
| assert isinstance(event, TaskStatusUpdateEvent) | |
| assert event.status.state == TaskState.TASK_STATE_FAILED | |
| assert event.context_id == 'test-context-id' |
…ndler CR feedback: The newly created TaskStatusUpdateEvent was missing context_id, which would trigger InvalidParamsError during validation in TaskManager.save_task_event. Also added assertion in test to prevent future regressions.
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已根据 CR 反馈修复：在 TaskStatusUpdateEvent 中添加了 context_id 字段。请重新审核。 |
The explicit FAILED state transition in producer exception handler breaks existing tests by changing exception propagation behavior. Need to find alternative solution for orphan SUBMITTED rows issue.
Test was added for the explicit FAILED state transition which was reverted due to breaking existing tests. The initial_message fix remains as the solution for orphan SUBMITTED rows.
🧪 Code Coverage (vs
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感谢 CR 反馈！ 关于 回滚原因我在 producer exception handler 中添加的显式 FAILED 状态转换 (
这导致 3 个测试失败：
当前解决方案只保留了传递 这解决了 issue #1067 的核心问题：orphan SUBMITTED rows 没有 history。 如果需要显式 FAILED 状态转换，可能需要在不破坏异常传播的前提下实现，例如：
请指导下一步方向。 |
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Summary
Fixes #1067: ActiveTaskRegistry produces orphan SUBMITTED rows when AgentExecutor.execute() raises before emitting any events.
Problem
In long-running production deployments using
DefaultRequestHandlerV2+DatabaseTaskStore, tasks could be persisted as orphan rows:status.state == TaskState.TASK_STATE_SUBMITTEDhistory == [](empty)metadata == Nonelast_updated == NoneThis occurred due to a race between
ActiveTaskRegistry.get_or_create()and the_run_producerexception path.Solution
Pass initial_message to TaskManager: Add
initial_messageparameter toActiveTaskRegistry.get_or_create()and forwardparams.messagefromDefaultRequestHandlerV2._setup_active_task.This ensures that even if the producer fails before emitting any events, the persisted row has a populated
historywith the original message.Changes
src/a2a/server/agent_execution/active_task_registry.py: Addinitial_messageparametersrc/a2a/server/request_handlers/default_request_handler_v2.py: Passparams.messagetoget_or_create()tests/server/agent_execution/test_active_task.py: Add regression test for context_idTesting