How should I handle working with celeryd_multi from code?
Question: So far, I've been working only with `python manage.py celeryd`, starting it
like this:

`python manage.py celeryd -l info --settings=settings`

The code from my view, does this:

    
    
    BinaryExecTask.delay(request.POST["binary_path"])
    

And the code from my `settings.py`, is this:

    
    
    import djcelery
    djcelery.setup_loader()
    
    BROKER_BACKEND = "djkombu.transport.DatabaseTransport"
    #celery
    BROKER_HOST = "localhost"
    BROKER_PORT = 5672
    BROKER_USER = "guest"
    BROKER_PASSWORD = "guest"
    BROKER_VHOST = "/"
    

and it will execute some binaries in the background. The thing is, some of the
binaries take pretty short time to run, while others may take up to half an
hour. Working with `celeryd`, all my tasks are blocked until the current one
finishes it's execution. I saw
[here](http://ask.github.com/celery/reference/celery.bin.celeryd_multi.html#examples)
some examples of starting celeryd_multi, but running:

`python manage.py celeryd_multi start 3 --settings=settings -l info`

gives this error:

    
    
    celeryd-multi v2.3.1
    > Starting nodes...
            > celery1.x: Traceback (most recent call last):
      File "manage.py", line 14, in <module>
        execute_manager(settings)
      File "c:\code\python27\lib\site-packages\django-1.3-py2.7.egg\django\core\management\_
     line 438, in execute_manager
        utility.execute()
      File "c:\code\python27\lib\site-packages\django-1.3-py2.7.egg\django\core\management\_
     line 379, in execute
        self.fetch_command(subcommand).run_from_argv(self.argv)
      File "c:\code\python27\lib\site-packages\django_celery-2.3.3-py2.7.egg\djcelery\manage
    s\celeryd_multi.py", line 22, in run_from_argv
        ["%s %s" % (argv[0], argv[1])] + argv[2:])
      File "c:\code\python27\lib\site-packages\celery-2.3.1-py2.7.egg\celery\bin\celeryd_mul
     172, in execute_from_commandline
        self.commands[argv[0]](argv[1:], cmd)
      File "c:\code\python27\lib\site-packages\celery-2.3.1-py2.7.egg\celery\bin\celeryd_mul
     205, in start
        retcode = self.waitexec(argv)
      File "c:\code\python27\lib\site-packages\celery-2.3.1-py2.7.egg\celery\bin\celeryd_mul
     354, in waitexec
        pipe = Popen(argstr, env=self.env)
      File "c:\code\python27\lib\subprocess.py", line 672, in __init__
        errread, errwrite)
      File "c:\code\python27\lib\subprocess.py", line 882, in _execute_child
        startupinfo)
    WindowsError: [Error 2] The system cannot find the file specified
    

The `celeryd-multi start 3 -c 3` throws the same error. What should I do so
that I could succesfully start a celery instance that will allow me to run
more tasks in parallel? Also, would I need to do something different in my
view?

EDIT: some debugging led me here ( site-
packages\celery-2.3.1-py2.7.egg\celery\bin\celeryd_multi.py(354)waitexec )

    
    
    351         def waitexec(self, argv, path=sys.executable):
    352             args = " ".join([path] + list(argv))
    353  ->         argstr = shlex.split(args.encode("utf-8"))
    354             pipe = Popen(argstr, env=self.env)
    (Pdb) p argstr
    ['c:codepython27python.exe', 'manage.py', 'celeryd_detach', '-l', 'info', '--pidfile=celeryd@1.pid',
     '-n', 'celery1.x', '--logfile=celeryd@1.log']
    (Pdb) p Popen(argstr, env=self.env)
    *** WindowsError: WindowsError(2, 'The system cannot find the file specified')
    (Pdb)
    

So, as we can see, the path to Python gets destroyed :). What should I do
next?

EDIT2: I opened an issue [here](https://github.com/ask/celery/issues/472)


Answer: Looks like smth Windows-specific... Did you try to provide full path to python
executable in command line like

    
    
    C:\code\python27\bin\python.exe manage.py celeryd_multi start 3 --settings=settings -l info
    

Also, use full paths for python file can be usefull

    
    
    C:\code\python27\bin\python.exe  C:\path\to\your\project\manage.py celeryd_multi start 3 --settings=settings -l info
    

