anyio.BrokenResourceError when Saving Memory via SSE from Claude Desktop

[mdlmarkham]

🐛 Describe the bug

I'm experiencing an anyio.BrokenResourceError when attempting to save a memory from Claude Desktop using the SSE endpoint of the OpenMemory MCP server.

Environment:

• Claude Desktop Version: 0.1.0
• OpenMemory MCP Server Version: [Please specify, e.g., latest from main branch]
• Python Version: 3.12
• Operating System: [e.g., Windows 11 / macOS 14 / Ubuntu 22.04]
• Docker: [Yes/No]([Latenode Official Community][1])

Steps to Reproduce:

1. Start the OpenMemory MCP server.
2. Launch Claude Desktop and connect it to the MCP server via the SSE endpoint.
3. Attempt to save a memory (e.g., using the add_memories tool).
4. Observe the server logs for errors.([Reddit][2])

Observed Behavior:

The server logs the following traceback:

Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/anyio/streams/memory.py", line 213, in send_nowait
    raise BrokenResourceError
anyio.BrokenResourceError

This error occurs during the execution of handle_post_message in the sse.py module:

await writer.send(session_message)

Expected Behavior:

The memory should be saved successfully without any exceptions, and the server should handle the SSE communication gracefully.

[genesiscz]

I am having similar issue. The memory basiccally fails to save because it times out. The mcp logs:

  |   File "/usr/local/lib/python3.12/site-packages/fastapi/routing.py", line 212, in run_endpoint_function

  |     return await dependant.call(**values)

  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  |   File "/usr/src/openmemory/app/mcp_server.py", line 339, in handle_sse

  |     async with sse.connect_sse(

  |                ^^^^^^^^^^^^^^^^

  |   File "/usr/local/lib/python3.12/contextlib.py", line 231, in __aexit__

  |     await self.gen.athrow(value)

  |   File "/usr/local/lib/python3.12/site-packages/mcp/server/sse.py", line 128, in connect_sse

  |     async with anyio.create_task_group() as tg:

  |                ^^^^^^^^^^^^^^^^^^^^^^^^^

  |   File "/usr/local/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 ----------------

    | Exception Group Traceback (most recent call last):

    |   File "/usr/local/lib/python3.12/site-packages/mcp/server/sse.py", line 147, in connect_sse

    |     yield (read_stream, write_stream)

    |   File "/usr/src/openmemory/app/mcp_server.py", line 344, in handle_sse

    |     await mcp._mcp_server.run(

    |   File "/usr/local/lib/python3.12/site-packages/mcp/server/lowlevel/server.py", line 489, in run

    |     async with AsyncExitStack() as stack:

    |                ^^^^^^^^^^^^^^^^

    |   File "/usr/local/lib/python3.12/contextlib.py", line 754, in __aexit__

    |     raise exc_details[1]

    |   File "/usr/local/lib/python3.12/contextlib.py", line 737, in __aexit__

    |     cb_suppress = await cb(*exc_details)

    |                   ^^^^^^^^^^^^^^^^^^^^^^

    |   File "/usr/local/lib/python3.12/site-packages/mcp/shared/session.py", line 209, in __aexit__

    |     return await self._task_group.__aexit__(exc_type, exc_val, exc_tb)

    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    |   File "/usr/local/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 "/usr/local/lib/python3.12/site-packages/mcp/server/session.py", line 146, in _receive_loop

      |     await super()._receive_loop()

      |   File "/usr/local/lib/python3.12/site-packages/mcp/shared/session.py", line 348, in _receive_loop

      |     await self._received_request(responder)

      |   File "/usr/local/lib/python3.12/site-packages/mcp/server/session.py", line 171, in _received_request

      |     raise RuntimeError(

      | RuntimeError: Received request before initialization was complete

      +------------------------------------

INFO:     192.168.65.1:62866 - "GET /mcp/claude/sse/Martin HTTP/1.1" 200 OK

[rollinsio]

I have had a similar issue, but with Claude Code. Another thread said that it might be related to an MCP version mismatch. I haven't checked the version that Claude is on directly, but someone said it was a version from 2024. I have had some success by using supergateway to do a conversion between versions, but it is spotty at best. I'll get some documents saved, but others just flake out.

"openmemory": { "command": "npx", "args": ["-y", "supergateway", "--sse", "http://localhost:8765/mcp/claude/sse/<user>", "--outputTransport", "stdio"], "env": {} }