hannespr opened a new issue, #38512:
URL: https://github.com/apache/superset/issues/38512
### Bug description
Superset startup fails as `fastmcp` is required but not provided:
```
ERROR:superset.app:Failed to create app
Traceback (most recent call last):
File "/app/.venv/lib/python3.11/site-packages/superset/app.py", line 84,
in create_app
app_initializer.init_app()
File
"/app/.venv/lib/python3.11/site-packages/superset/initialization/__init__.py",
line 759, in init_app
self.init_app_in_ctx()
File
"/app/.venv/lib/python3.11/site-packages/superset/initialization/__init__.py",
line 626, in init_app_in_ctx
self.init_all_dependencies_and_extensions()
File
"/app/.venv/lib/python3.11/site-packages/superset/initialization/__init__.py",
line 563, in init_all_dependencies_and_extensions
self.init_core_dependencies()
File
"/app/.venv/lib/python3.11/site-packages/superset/initialization/__init__.py",
line 552, in init_core_dependencies
initialize_core_mcp_dependencies()
File
"/app/.venv/lib/python3.11/site-packages/superset/core/mcp/core_mcp_injection.py",
line 267, in initialize_core_mcp_dependencies
from superset.mcp_service import app # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/app/.venv/lib/python3.11/site-packages/superset/mcp_service/app.py", line 28,
in <module>
from fastmcp import FastMCP
ModuleNotFoundError: No module named 'fastmcp'
```
Steps to reproduce:
1. Build and run `Dockerfile` without any additional parameters
I fixed it locally as following in `superset/core/mcp/core_mcp_injection.py`:
```
def initialize_core_mcp_dependencies() -> None:
"""
Initialize MCP dependency injection by replacing abstract functions
in superset_core.api.mcp with concrete implementations.
Also imports MCP service app to register all host tools BEFORE extension
loading.
If fastmcp is not installed, MCP initialization is skipped gracefully.
"""
try:
import importlib
if importlib.util.find_spec("fastmcp") is None:
logger.info(
"fastmcp package not installed — skipping MCP initialization"
)
return
```
### Screenshots/recordings
_No response_
### Superset version
master / latest-dev
### Python version
3.11
### Node version
18 or greater
### Browser
Not applicable
### Additional context
_No response_
### Checklist
- [x] I have searched Superset docs and Slack and didn't find a solution to
my problem.
- [x] I have searched the GitHub issue tracker and didn't find a similar bug
report.
- [x] I have checked Superset's logs for errors and if I found a relevant
Python stacktrace, I included it here as text in the "additional context"
section.
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