Agent with remote mcp server deployed with kagent deploy fails #1048
Description
Create a project with kagent init, then add a remote MCP (e.g. kagent add-mcp) - i am using github mcp server as an example. Deploy everything to the cluster and try chatting with the agent -- it hangs and the agent pod has these logs:
ERROR:mcp.client.streamable_http:Error parsing SSE message
Traceback (most recent call last):
File "/.kagent/.venv/lib/python3.13/site-packages/mcp/client/streamable_http.py", line 162, in _handle_sse_event
message = JSONRPCMessage.model_validate_json(sse.data)
File "/.kagent/.venv/lib/python3.13/site-packages/pydantic/main.py", line 766, in model_validate_json
return cls.__pydantic_validator__.validate_json(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
json_data, strict=strict, extra=extra, context=context, by_alias=by_alias, by_name=by_name
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
pydantic_core._pydantic_core.ValidationError: 1 validation error for JSONRPCMessage
Invalid JSON: EOF while parsing a value at line 1 column 0 [type=json_invalid, input_value='', input_type=str]
For further information visit https://errors.pydantic.dev/2.12/v/json_invalid
INFO: 10.244.0.1:51990 - "GET /health HTTP/1.1" 200 OK
ERROR:mcp.client.streamable_http:Error parsing SSE message
Traceback (most recent call last):
File "/.kagent/.venv/lib/python3.13/site-packages/mcp/client/streamable_http.py", line 162, in _handle_sse_event
message = JSONRPCMessage.model_validate_json(sse.data)
File "/.kagent/.venv/lib/python3.13/site-packages/pydantic/main.py", line 766, in model_validate_json
return cls.__pydantic_validator__.validate_json(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
json_data, strict=strict, extra=extra, context=context, by_alias=by_alias, by_name=by_name
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
pydantic_core._pydantic_core.ValidationError: 1 validation error for JSONRPCMessage
Invalid JSON: EOF while parsing a value at line 1 column 0 [type=json_invalid, input_value='', input_type=str]
For further information visit https://errors.pydantic.dev/2.12/v/json_invalid
INFO: 10.244.0.1:58038 - "GET /health HTTP/1.1" 200 OK
ERROR:mcp.client.streamable_http:Error parsing SSE message
Traceback (most recent call last):
File "/.kagent/.venv/lib/python3.13/site-packages/mcp/client/streamable_http.py", line 162, in _handle_sse_event
message = JSONRPCMessage.model_validate_json(sse.data)
File "/.kagent/.venv/lib/python3.13/site-packages/pydantic/main.py", line 766, in model_validate_json
return cls.__pydantic_validator__.validate_json(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
json_data, strict=strict, extra=extra, context=context, by_alias=by_alias, by_name=by_name
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
pydantic_core._pydantic_core.ValidationError: 1 validation error for JSONRPCMessage
Invalid JSON: EOF while parsing a value at line 1 column 0 [type=json_invalid, input_value='', input_type=str]
For further information visit https://errors.pydantic.dev/2.12/v/json_invalid
INFO: 10.244.0.1:33466 - "GET /health HTTP/1.1" 200 OK
ERROR:mcp.client.streamable_http:Error parsing SSE message
Traceback (most recent call last):
File "/.kagent/.venv/lib/python3.13/site-packages/mcp/client/streamable_http.py", line 162, in _handle_sse_event
message = JSONRPCMessage.model_validate_json(sse.data)
File "/.kagent/.venv/lib/python3.13/site-packages/pydantic/main.py", line 766, in model_validate_json
return cls.__pydantic_validator__.validate_json(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
json_data, strict=strict, extra=extra, context=context, by_alias=by_alias, by_name=by_name
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
pydantic_core._pydantic_core.ValidationError: 1 validation error for JSONRPCMessage
Invalid JSON: EOF while parsing a value at line 1 column 0 [type=json_invalid, input_value='', input_type=str]
For further information visit https://errors.pydantic.dev/2.12/v/json_invalid