mcp/time container crashes due to Pydantic validation error #1290
Description
Which version of LM Studio?
LM Studio 0.3.33
Which operating system?
macOS 15.5
What is the bug?
mcp/time container crashes due to Pydantic validation error
Logs
{"jsonrpc":"2.0","id":0,"result":{"protocolVersion":"2024-11-05","capabilities":{"experimental":{},"tools":{"listChanged":false}},"serverInfo":{"name":"mcp-time","version":"1.0.0"}}}
{"jsonrpc":"2.0","id":1,"result":{"tools":[{"name":"get_current_time","description":"Get current time in a specific timezones","inputSchema":{"type":"object","properties":{"timezone":{"type":"string","description":"IANA timezone name (e.g., 'America/New_York', 'Europe/London'). Use 'UTC' as local timezone if no timezone provided by the user."}},"required":["timezone"]}},{"name":"convert_time","description":"Convert time between timezones","inputSchema":{"type":"object","properties":{"source_timezone":{"type":"string","description":"Source IANA timezone name (e.g., 'America/New_York', 'Europe/London'). Use 'UTC' as local timezone if no source timezone provided by the user."},"time":{"type":"string","description":"Time to convert in 24-hour format (HH:MM)"},"target_timezone":{"type":"string","description":"Target IANA timezone name (e.g., 'Asia/Tokyo', 'America/San_Francisco'). Use 'UTC' as local timezone if no target timezone provided by the user."}},"required":["source_timezone","time","target_timezone"]}}]}}
- Exception Group Traceback (most recent call last):
| File "/app/.venv/lib/python3.10/site-packages/mcp/server/stdio.py", line 83, in stdio_server
| yield read_stream, write_stream
| File "/app/.venv/lib/python3.10/site-packages/mcp_server_time/server.py", line 201, in serve
| await server.run(read_stream, write_stream, options)
| File "/app/.venv/lib/python3.10/site-packages/mcp/server/init.py", line 404, in run
| async with ServerSession(
| File "/app/.venv/lib/python3.10/site-packages/mcp/shared/session.py", line 122, in aexit
| return await self._task_group.aexit(exc_type, exc_val, exc_tb)
| File "/app/.venv/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 763, in aexit
| raise BaseExceptionGroup(
| exceptiongroup.ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
+-+---------------- 1 ----------------
| Traceback (most recent call last):
| File "/app/.venv/lib/python3.10/site-packages/mcp/shared/session.py", line 235, in _receive_loop
| notification = self._receive_notification_type.model_validate(
| File "/app/.venv/lib/python3.10/site-packages/pydantic/main.py", line 627, in model_validate
| return cls.pydantic_validator.validate_python(
| pydantic_core._pydantic_core.ValidationError: 5 validation errors for ClientNotification
| ProgressNotification.method
| Input should be 'notifications/progress' [type=literal_error, input_value='notifications/cancelled', input_type=str]
| For further information visit https://errors.pydantic.dev/2.10/v/literal_error
| ProgressNotification.params.progressToken
| Field required [type=missing, input_value={'requestId': 1, 'reason'... operation was aborted'}, input_type=dict]
| For further information visit https://errors.pydantic.dev/2.10/v/missing
| ProgressNotification.params.progress
| Field required [type=missing, input_value={'requestId': 1, 'reason'... operation was aborted'}, input_type=dict]
| For further information visit https://errors.pydantic.dev/2.10/v/missing
| InitializedNotification.method
| Input should be 'notifications/initialized' [type=literal_error, input_value='notifications/cancelled', input_type=str]
| For further information visit https://errors.pydantic.dev/2.10/v/literal_error
| RootsListChangedNotification.method
| Input should be 'notifications/roots/list_changed' [type=literal_error, input_value='notifications/cancelled', input_type=str]
| For further information visit https://errors.pydantic.dev/2.10/v/literal_error
+------------------------------------
During handling of the above exception, another exception occurred:
- Exception Group Traceback (most recent call last):
| File "/app/.venv/bin/mcp-server-time", line 10, in
| sys.exit(main())
| File "/app/.venv/lib/python3.10/site-packages/mcp_server_time/init.py", line 15, in main
| asyncio.run(serve(args.local_timezone))
| File "/root/.local/share/uv/python/cpython-3.10.18-linux-aarch64-gnu/lib/python3.10/asyncio/runners.py", line 44, in run
| return loop.run_until_complete(main)
| File "/root/.local/share/uv/python/cpython-3.10.18-linux-aarch64-gnu/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
| return future.result()
| File "/app/.venv/lib/python3.10/site-packages/mcp_server_time/server.py", line 200, in serve
| async with stdio_server() as (read_stream, write_stream):
| File "/root/.local/share/uv/python/cpython-3.10.18-linux-aarch64-gnu/lib/python3.10/contextlib.py", line 217, in aexit
| await self.gen.athrow(typ, value, traceback)
| File "/app/.venv/lib/python3.10/site-packages/mcp/server/stdio.py", line 80, in stdio_server
| async with anyio.create_task_group() as tg:
| File "/app/.venv/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 763, in aexit
| raise BaseExceptionGroup(
| exceptiongroup.ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
+-+---------------- 1 ----------------
| Exception Group Traceback (most recent call last):
| File "/app/.venv/lib/python3.10/site-packages/mcp/server/stdio.py", line 83, in stdio_server
| yield read_stream, write_stream
| File "/app/.venv/lib/python3.10/site-packages/mcp_server_time/server.py", line 201, in serve
| await server.run(read_stream, write_stream, options)
| File "/app/.venv/lib/python3.10/site-packages/mcp/server/init.py", line 404, in run
| async with ServerSession(
| File "/app/.venv/lib/python3.10/site-packages/mcp/shared/session.py", line 122, in aexit
| return await self._task_group.aexit(exc_type, exc_val, exc_tb)
| File "/app/.venv/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 763, in aexit
| raise BaseExceptionGroup(
| exceptiongroup.ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
+-+---------------- 1 ----------------
| Traceback (most recent call last):
| File "/app/.venv/lib/python3.10/site-packages/mcp/shared/session.py", line 235, in _receive_loop
| notification = self._receive_notification_type.model_validate(
| File "/app/.venv/lib/python3.10/site-packages/pydantic/main.py", line 627, in model_validate
| return cls.pydantic_validator.validate_python(
| pydantic_core._pydantic_core.ValidationError: 5 validation errors for ClientNotification
| ProgressNotification.method
| Input should be 'notifications/progress' [type=literal_error, input_value='notifications/cancelled', input_type=str]
| For further information visit https://errors.pydantic.dev/2.10/v/literal_error
| ProgressNotification.params.progressToken
| Field required [type=missing, input_value={'requestId': 1, 'reason'... operation was aborted'}, input_type=dict]
| For further information visit https://errors.pydantic.dev/2.10/v/missing
| ProgressNotification.params.progress
| Field required [type=missing, input_value={'requestId': 1, 'reason'... operation was aborted'}, input_type=dict]
| For further information visit https://errors.pydantic.dev/2.10/v/missing
| InitializedNotification.method
| Input should be 'notifications/initialized' [type=literal_error, input_value='notifications/cancelled', input_type=str]
| For further information visit https://errors.pydantic.dev/2.10/v/literal_error
| RootsListChangedNotification.method
| Input should be 'notifications/roots/list_changed' [type=literal_error, input_value='notifications/cancelled', input_type=str]
| For further information visit https://errors.pydantic.dev/2.10/v/literal_error
+------------------------------------
To Reproduce
- Set up mcp/time as follows -
{
"mcpServers": {
"time": {
"command": "docker",
"args": [
"run",
"-i",
"-e",
"LOCAL_TIMEZONE=America/New_York",
"mcp/time"
]
}
}
}
- The container will eventually crash and LM Studio will report a -32000 error.