langgraph fastapi integration error when sending multiple requests

[NiuBlibing]

INFO:     127.0.0.1:60494 - "POST /agent/agentic_chat HTTP/1.1" 200 OK
INFO:     127.0.0.1:60498 - "POST /agent/agentic_chat HTTP/1.1" 200 OK
ERROR:    Exception in ASGI application
  + Exception Group Traceback (most recent call last):
  |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_utils.py", line 77, in collapse_excgroups
  |     yield
  |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 271, in __call__
  |     async with anyio.create_task_group() as task_group:
  |                ^^^^^^^^^^^^^^^^^^^^^^^^^
  |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 772, in __aexit__
  |     raise BaseExceptionGroup(
  | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
  +-+---------------- 1 ----------------
    | Traceback (most recent call last):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 403, in run_asgi
    |     result = await app(  # type: ignore[func-returns-value]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    |     return await self.app(scope, receive, send)
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/fastapi/applications.py", line 1054, in __call__
    |     await super().__call__(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/applications.py", line 113, in __call__
    |     await self.middleware_stack(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 186, in __call__
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 164, in __call__
    |     await self.app(scope, receive, _send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/exceptions.py", line 63, in __call__
    |     await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    |     await app(scope, receive, sender)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 716, in __call__
    |     await self.middleware_stack(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 736, in app
    |     await route.handle(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 290, in handle
    |     await self.app(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 78, in app
    |     await wrap_app_handling_exceptions(app, request)(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    |     await app(scope, receive, sender)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 76, in app
    |     await response(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 270, in __call__
    |     with collapse_excgroups():
    |          ^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/.local/share/uv/python/cpython-3.12.8-linux-x86_64-gnu/lib/python3.12/contextlib.py", line 158, in __exit__
    |     self.gen.throw(value)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_utils.py", line 83, in collapse_excgroups
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 274, in wrap
    |     await func()
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 254, in stream_response
    |     async for chunk in self.body_iterator:
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/endpoint.py", line 21, in event_generator
    |     async for event in agent.run(input_data):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 91, in run
    |     async for event_str in self._handle_stream_events(input_data):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 201, in _handle_stream_events
    |     async for single_event in self._handle_single_event(event, state):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 430, in _handle_single_event
    |     reasoning_data = resolve_reasoning_content(event["data"]["chunk"]) if event["data"]["chunk"] else None
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/utils.py", line 162, in resolve_reasoning_content
    |     type=parsed.get("type", "text"),
    |          ^^^^^^^^^^
    | AttributeError: 'int' object has no attribute 'get'
    +------------------------------------

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 403, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    return await self.app(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/applications.py", line 113, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 186, in __call__
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 164, in __call__
    await self.app(scope, receive, _send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/exceptions.py", line 63, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 716, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 736, in app
    await route.handle(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 290, in handle
    await self.app(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 78, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 76, in app
    await response(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 270, in __call__
    with collapse_excgroups():
         ^^^^^^^^^^^^^^^^^^^^
  File "/home/test/.local/share/uv/python/cpython-3.12.8-linux-x86_64-gnu/lib/python3.12/contextlib.py", line 158, in __exit__
    self.gen.throw(value)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_utils.py", line 83, in collapse_excgroups
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 274, in wrap
    await func()
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 254, in stream_response
    async for chunk in self.body_iterator:
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/endpoint.py", line 21, in event_generator
    async for event in agent.run(input_data):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 91, in run
    async for event_str in self._handle_stream_events(input_data):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 201, in _handle_stream_events
    async for single_event in self._handle_single_event(event, state):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 430, in _handle_single_event
    reasoning_data = resolve_reasoning_content(event["data"]["chunk"]) if event["data"]["chunk"] else None
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/utils.py", line 162, in resolve_reasoning_content
    type=parsed.get("type", "text"),
         ^^^^^^^^^^
AttributeError: 'int' object has no attribute 'get'
ERROR:    Exception in ASGI application
  + Exception Group Traceback (most recent call last):
  |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_utils.py", line 77, in collapse_excgroups
  |     yield
  |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 271, in __call__
  |     async with anyio.create_task_group() as task_group:
  |                ^^^^^^^^^^^^^^^^^^^^^^^^^
  |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 772, in __aexit__
  |     raise BaseExceptionGroup(
  | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
  +-+---------------- 1 ----------------
    | Traceback (most recent call last):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 403, in run_asgi
    |     result = await app(  # type: ignore[func-returns-value]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    |     return await self.app(scope, receive, send)
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/fastapi/applications.py", line 1054, in __call__
    |     await super().__call__(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/applications.py", line 113, in __call__
    |     await self.middleware_stack(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 186, in __call__
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 164, in __call__
    |     await self.app(scope, receive, _send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/exceptions.py", line 63, in __call__
    |     await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    |     await app(scope, receive, sender)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 716, in __call__
    |     await self.middleware_stack(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 736, in app
    |     await route.handle(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 290, in handle
    |     await self.app(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 78, in app
    |     await wrap_app_handling_exceptions(app, request)(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    |     await app(scope, receive, sender)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 76, in app
    |     await response(scope, receive, send)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 270, in __call__
    |     with collapse_excgroups():
    |          ^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/.local/share/uv/python/cpython-3.12.8-linux-x86_64-gnu/lib/python3.12/contextlib.py", line 158, in __exit__
    |     self.gen.throw(value)
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_utils.py", line 83, in collapse_excgroups
    |     raise exc
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 274, in wrap
    |     await func()
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 254, in stream_response
    |     async for chunk in self.body_iterator:
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/endpoint.py", line 21, in event_generator
    |     async for event in agent.run(input_data):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 91, in run
    |     async for event_str in self._handle_stream_events(input_data):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 201, in _handle_stream_events
    |     async for single_event in self._handle_single_event(event, state):
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 430, in _handle_single_event
    |     reasoning_data = resolve_reasoning_content(event["data"]["chunk"]) if event["data"]["chunk"] else None
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/utils.py", line 162, in resolve_reasoning_content
    |     type=parsed.get("type", "text"),
    |          ^^^^^^^^^^
    | AttributeError: 'int' object has no attribute 'get'
    +------------------------------------

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 403, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    return await self.app(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/applications.py", line 113, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 186, in __call__
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 164, in __call__
    await self.app(scope, receive, _send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/middleware/exceptions.py", line 63, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 716, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 736, in app
    await route.handle(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 290, in handle
    await self.app(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 78, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/routing.py", line 76, in app
    await response(scope, receive, send)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 270, in __call__
    with collapse_excgroups():
         ^^^^^^^^^^^^^^^^^^^^
  File "/home/test/.local/share/uv/python/cpython-3.12.8-linux-x86_64-gnu/lib/python3.12/contextlib.py", line 158, in __exit__
    self.gen.throw(value)
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/_utils.py", line 83, in collapse_excgroups
    raise exc
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 274, in wrap
    await func()
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/starlette/responses.py", line 254, in stream_response
    async for chunk in self.body_iterator:
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/endpoint.py", line 21, in event_generator
    async for event in agent.run(input_data):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 91, in run
    async for event_str in self._handle_stream_events(input_data):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 201, in _handle_stream_events
    async for single_event in self._handle_single_event(event, state):
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 430, in _handle_single_event
    reasoning_data = resolve_reasoning_content(event["data"]["chunk"]) if event["data"]["chunk"] else None
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/test/ref/llm/client/AG-UI/ag-ui/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/examples/.venv/lib/python3.12/site-packages/ag_ui_langgraph/utils.py", line 162, in resolve_reasoning_content
    type=parsed.get("type", "text"),
         ^^^^^^^^^^
AttributeError: 'int' object has no attribute 'get'
Task chat_node with path ('__pregel_pull', 'chat_node') wrote to unknown channel branch:to:__end__, ignoring it.
Task chat_node with path ('__pregel_pull', 'chat_node') wrote to unknown channel branch:to:__end__, ignoring it.

When sending multiple requests concerently, it throw errors.

[NathanTarbert]

Hi @NiuBlibing, thanks for creating the issue.

Can you please share the relevant code so we can try and reproduce the error?

[NiuBlibing]

@NathanTarbert I just open two pages of dojo and send requests at same time.

[ranst91]

This issue has been identified and a fix for the dojo should be available soon.