pythonwindowsfcntlmlflow

Error with "mlflow ui" when trying to run it on MS Windows

When I run mlflow ui the following error occurred:

Traceback (most recent call last):
  File "c:\anaconda3\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\anaconda3\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Anaconda3\Scripts\gunicorn.exe\__main__.py", line 5, in <module>
  File "c:\anaconda3\lib\site-packages\gunicorn\app\wsgiapp.py", line 9, in <module>
    from gunicorn.app.base import Application
  File "c:\anaconda3\lib\site-packages\gunicorn\app\base.py", line 12, in <module>
    from gunicorn import util
  File "c:\anaconda3\lib\site-packages\gunicorn\util.py", line 9, in <module>
    import fcntl
ModuleNotFoundError: No module named 'fcntl'
Traceback (most recent call last):
  File "c:\anaconda3\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\anaconda3\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Anaconda3\Scripts\mlflow.exe\__main__.py", line 9, in <module>
  File "c:\anaconda3\lib\site-packages\click\core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "c:\anaconda3\lib\site-packages\click\core.py", line 697, in main
    rv = self.invoke(ctx)
  File "c:\anaconda3\lib\site-packages\click\core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\anaconda3\lib\site-packages\click\core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\anaconda3\lib\site-packages\click\core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "c:\anaconda3\lib\site-packages\mlflow\cli.py", line 131, in ui
    mlflow.server._run_server(file_store, file_store, host, port, 1)
  File "c:\anaconda3\lib\site-packages\mlflow\server\__init__.py", line 48, in _run_server
    env=env_map, stream_output=True)
  File "c:\anaconda3\lib\site-packages\mlflow\utils\process.py", line 38, in exec_cmd
    raise ShellCommandException("Non-zero exitcode: %s" % (exit_code))
mlflow.utils.process.ShellCommandException: Non-zero exitcode: 1

I used anaconda + python 3.6.5 and I installed git and set path with C:\Program Files\Git\bin\git.exe and C:\Program Files\Git\cmd.

I installed mlflow whit pip install mlflow and its version is 0.2.1.

I set a variable with name GIT_PYTHON_GIT_EXECUTABLE and value C:\Program Files\Git\bin\git.exe in Environment Variables.

How can I solve this?

Solution

  • mlflow documentation already says that

    Note 2: We do not currently support running MLflow on Windows. Despite this, we would appreciate any contributions to make MLflow work better on Windows.

    You're hitting fcntl problem: it's not available on MS Windows platform because it's a "wrapper" around the fcntl function that's available on POSIX-compatible systems. (See https://stackoverflow.com/a/1422436/236007 for more details.)

    Solving this requires modifying the source code of mlflow accordingly.