multiprocessing fork() vs spawn() Question: I was reading the description of the two from the python doc: spawn The parent process starts a fresh python interpreter process. The child process will only inherit those resources necessary to run the process objects run() method. In particular, unnecessary file descriptors and handles from the parent process will …
Empty python process hangs on join [sys.stderr.flush()] Question: Python guru I need your help. I faced quite strange behavior: empty python Process hangs on joining. Looks like it forks some locked resource. Env: Python version: 3.5.3 OS: Ubuntu 16.04.2 LTS Kernel: 4.4.0-75-generic Problem description: 1) I have a logger with thread to handle messages in …
Python:How os.fork() works? Question: I am learning multiprocessing in python. I tried multiprocessing and after I read the source code of multiprocessing module, I found it use os.fork(), so I wrote some code to test os.fork(), but I am stuck. My code is as following: #!/usr/bin/env python # -*- coding: utf-8 -*- import os import …
How to spawn a new independent process in Python Question: I have a some Python code that occasionally needs to span a new process to run a shell script in a “fire and forget” manner, i.e. without blocking. The shell script will not communicate with the original Python code and will in fact probably terminate …
python subprocess.Popen and ssh port forwarding in the background Question: I need to have functionality that would essentially emulate user creating a port forwrding with ssh. So, essentially that should work like that: – execute ssh -f -N -L 10000:gateway:11000 localhost – if there is an output from that command, show to the user and …
Run child processes as different user from a long running Python process Question: I’ve got a long running, daemonized Python process that uses subprocess to spawn new child processes when certain events occur. The long running process is started by a user with super user privileges. I need the child processes it spawns to run …
