RuntimeError: Attempted to exit cancel scope in a different task than it was entered in

[reesmonty (jacobreesmontgomery)]

ERROR

I'm seeing the below error when the call is made to create an agent.

ERROR    Task exception was    runners.py:118
                             never retrieved                     
                             future: <Task                       
                             finished                            
                             name='Task-44'                      
                             coro=<<async_generato               
                             r_athrow without                    
                             __name__>()>                        
                             exception=RuntimeErro               
                             r('Attempted to exit                
                             cancel scope in a                   
                             different task than                 
                             it was entered in')>                
                             ╭─ Traceback (most ─╮               
                             │ /Users/jacobmontg │               
                             │ omery/.pyenv/vers │               
                             │ ions/agent-venv/l │               
                             │ ib/python3.11/sit │               
                             │ e-packages/anyio/ │               
                             │ _backends/_asynci │               
                             │ o.py:772 in       │               
                             │ __aexit__         │               
                             │                   │               
                             │    769 │   │   │  │               
                             │    770 │   │   │  │               
                             │    771 │   │   │  │               
                             │ ❱  772 │   │   │  │               
                             │    773 │   │   │  │               
                             │    774 │   │   │  │               
                             │    775 │   │   │  │               
                             ╰───────────────────╯               
                             BaseExceptionGroup:                 
                             unhandled errors in a               
                             TaskGroup (1                        
                             sub-exception)                      
                                                                 
                             ╭─ Sub-exception #1─╮               
                             │ ╭─ Traceback (m─╮ │               
                             │ │ /Users/jacobm │ │               
                             │ │ ontgomery/.py │ │               
                             │ │ env/versions/ │ │               
                             │ │ agent-venv/li │ │               
                             │ │ b/python3.11/ │ │               
                             │ │ site-packages │ │               
                             │ │ /mcp/client/s │ │               
                             │ │ tdio/__init__ │ │               
                             │ │ .py:173 in    │ │               
                             │ │ stdio_client  │ │               
                             │ │               │ │               
                             │ │   170 │   │   │ │               
                             │ │   171 │   │   │ │               
                             │ │   172 │   │   │ │               
                             │ │ ❱ 173 │   │   │ │               
                             │ │   174 │   │   │ │               
                             │ │   175 │   │   │ │               
                             │ │   176 │   │   │ │               
                             │ ╰───────────────╯ │               
                             │ GeneratorExit     │               
                             ╰───────────────────╯               
                                                                 
                             During handling of                  
                             the above exception,                
                             another exception                   
                             occurred:                           
                                                                 
                             ╭─ Traceback (most ─╮               
                             │ /Users/jacobmontg │               
                             │ omery/.pyenv/vers │               
                             │ ions/agent-venv/l │               
                             │ ib/python3.11/sit │               
                             │ e-packages/mcp/cl │               
                             │ ient/stdio/__init │               
                             │ __.py:166 in      │               
                             │ stdio_client      │               
                             │                   │               
                             │   163 │   │   exc │               
                             │   164 │   │   │   │               
                             │   165 │           │               
                             │ ❱ 166 │   async w │               
                             │   167 │   │   any │               
                             │   168 │   │   pro │               
                             │   169 │   ):      │               
                             │                   │               
                             │ /Users/jacobmontg │               
                             │ omery/.pyenv/vers │               
                             │ ions/agent-venv/l │               
                             │ ib/python3.11/sit │               
                             │ e-packages/anyio/ │               
                             │ _backends/_asynci │               
                             │ o.py:778 in       │               
                             │ __aexit__         │               
                             │                   │               
                             │    775 │   │   │  │               
                             │    776 │   │   │  │               
                             │    777 │   │   │  │               
                             │ ❱  778 │   │   │  │               
                             │    779 │   │   │  │               
                             │    780 │   │   │  │               
                             │    781 │   │   │  │               
                             │                   │               
                             │ /Users/jacobmontg │               
                             │ omery/.pyenv/vers │               
                             │ ions/agent-venv/l │               
                             │ ib/python3.11/sit │               
                             │ e-packages/anyio/ │               
                             │ _backends/_asynci │               
                             │ o.py:457 in       │               
                             │ __exit__          │               
                             │                   │               
                             │    454 │   │   if │               
                             │    455 │   │   │  │               
                             │    456 │   │   if │               
                             │ ❱  457 │   │   │  │               
                             │    458 │   │   │  │               
                             │    459 │   │   │  │               
                             │    460 │   │   │  │               
                             ╰───────────────────╯               
                             RuntimeError:                       
                             Attempted to exit                   
                             cancel scope in a                   
                             different task than                 
                             it was entered in                   
ERROR:    Task exception was never retrieved
future: <Task finished name='Task-44' coro=<<async_generator_athrow without __name__>()> exception=RuntimeError('Attempted to exit cancel scope in a different task than it was entered in')>
  + Exception Group Traceback (most recent call last):
  |   File "/Users/jacobmontgomery/.pyenv/versions/agent-venv/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 772, in __aexit__
  |     raise BaseExceptionGroup(
  | BaseExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
  +-+---------------- 1 ----------------
    | Traceback (most recent call last):
    |   File "/Users/jacobmontgomery/.pyenv/versions/agent-venv/lib/python3.11/site-packages/mcp/client/stdio/__init__.py", line 173, in stdio_client
    |     yield read_stream, write_stream
    | GeneratorExit
    +------------------------------------

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/jacobmontgomery/.pyenv/versions/agent-venv/lib/python3.11/site-packages/mcp/client/stdio/__init__.py", line 166, in stdio_client
    async with (
  File "/Users/jacobmontgomery/.pyenv/versions/agent-venv/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 778, in __aexit__
    if self.cancel_scope.__exit__(type(exc), exc, exc.__traceback__):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jacobmontgomery/.pyenv/versions/agent-venv/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 457, in __exit__
    raise RuntimeError(
RuntimeError: Attempted to exit cancel scope in a different task than it was entered in

CODE SNIPPET

This is the code snippet where the error occurs:

agent = await self.ai_foundry_client.agents.create_agent(
            model="gpt-4o",
            name="mcp-agent",
            instructions="You are a helpful assistant. When appropriate, use the available tools to help answer the user's query.",
            toolset=toolset,
        )

[reesmonty (jacobreesmontgomery)]

Resolved it with async context management revisions on my end.