num-procs + admin fails to start

[mlucool]

Hi,

ALL software version info

Panel: 0.13.1
Bokeh: 2.4.3
OS: osx

Description of expected behavior and the observed behavior

Using --num-procs with --admin breaks panel.

Complete, minimal, self-contained example code that reproduces the issue

Given example.py:

import panel as pn
import os

pn.extension()

def get_app():
   return pn.Pane(f'Hi from {os.getpid()}')

get_app().servable()

The following starts:

panel serve example.py --num-procs=10

But the following does not:

panel serve example.py --num-procs=10 --admin

And has errors like:

2022-09-07 18:39:09,503 Cannot start Bokeh server [EBADF]: OSError(9, 'Bad file descriptor')
2022-09-07 18:39:09,746 child 0 (pid 73866) exited with status 1, restarting

Stack traceback and/or browser JavaScript console output

[mlucool]

Thanks for the quick fix!