Title: python produces zombie in
Type: resource usage Stage:
Components: Library (Lib) Versions: Python 3.11, Python 3.10, Python 3.9
Status: pending Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: andrewsg, christian.heimes, dontbugme, eivindt, georg.brandl, marcadam, sphickson
Priority: normal Keywords:

Created on 2009-05-11 03:57 by dontbugme, last changed 2021-10-20 12:47 by christian.heimes.

Messages (7)
msg87561 - (view) Author: (dontbugme) Date: 2009-05-11 03:57
the webbrowser library produces a zombie process when opening urls.

please see
and the original bug report (by me) on ubuntu's launchpad (https:// for details.
could not find any references in your tracker, but i did not test it in 
newer versions than the one supplied in ubuntu atm (2.6.2), so please 
forgive me, if it is already fixed :)
msg91017 - (view) Author: Eivind Tagseth (eivindt) Date: 2009-07-28 21:20
The problem seems to be that there are no way to wait() for browser
processes that have died, and there is no mention of needing to wait()
in the documentation.

In my case, webbrowser finds my gnome-setting for the http-url handler
and sets up [ "firefox", "%s" ] as a BackgroundBrowser named 'gnome'. creates a Popen object and calls p.poll().  The
Popened firefox process finds my existing firefox process, and asks it
to open the url, then terminates.  It doesn't act quickly enough to
terminate before p.poll() is called though, and I end up with a zombie
firefox process, that keeps me from ending firefox unless I also kill my
python process.

If this is how this is intended to work, there should at least be a
section in the documentation warning users to call os.waitX() themselves
to avoid zombie processes.
msg110859 - (view) Author: Mark Lawrence (BreamoreBoy) * Date: 2010-07-20 03:43
Assigned as per maintainers list.
msg184662 - (view) Author: Marc Adam Anderson (marcadam) * Date: 2013-03-19 18:59
Unable to reproduce this bug on Mac OS X 10.8.3 (12D78) using Python 3.4.0a0 and the following browsers:

- Google Chrome 25.0.1364.172
- Firefox 13.0.1
- Safari 6.0.3 (8536.28.10)
msg184666 - (view) Author: Andrew Gorcester (andrewsg) * Date: 2013-03-19 19:44
I was able to reproduce on Ubuntu with Python 3.4 compiled from trunk 2013-03-17, but only with Firefox and not with Chrome.
msg186846 - (view) Author: Shaun Hickson (sphickson) * Date: 2013-04-13 21:07
Just as an additional data point, I was also unable to recreate this on OS X 10.8.3 using any browser.
msg404441 - (view) Author: Christian Heimes (christian.heimes) * (Python committer) Date: 2021-10-20 12:47
Are Python 3.9 to 3.11 still affected by the issue?

The webbrowser module now uses subprocess.Popen() to start browsers. The subprocess module calls wait() and performs additional cleanup to prevent zombies.
Date User Action Args
2021-10-20 12:47:41christian.heimessetstatus: open -> pending
versions: + Python 3.9, Python 3.10, Python 3.11, - Python 2.6, Python 3.1, Python 2.7, Python 3.2
nosy: + christian.heimes

messages: + msg404441
2014-02-03 18:33:27BreamoreBoysetnosy: - BreamoreBoy
2013-04-13 21:07:07sphicksonsetnosy: + sphickson
messages: + msg186846
2013-03-28 10:04:02georg.brandlsetassignee: georg.brandl ->
2013-03-19 19:44:52andrewsgsetnosy: + andrewsg
messages: + msg184666
2013-03-19 18:59:05marcadamsetnosy: + marcadam
messages: + msg184662
2010-07-20 03:43:12BreamoreBoysetversions: + Python 3.1, Python 2.7, Python 3.2
nosy: + georg.brandl, BreamoreBoy

messages: + msg110859

assignee: georg.brandl
2009-07-28 21:20:54eivindtsetnosy: + eivindt
messages: + msg91017
2009-05-11 03:57:56dontbugmecreate