Opened 10 years ago

Closed 9 years ago

Last modified 7 years ago

#9286 closed (worksforme)

Starting other processes in a view gives me some weird results.

Reported by: namename12 Owned by: nobody
Component: Uncategorized Version: 1.0
Severity: Keywords:
Cc: Triage Stage: Accepted
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: UI/UX:

Description (last modified by Karen Tracey)

I cannot start process as daemon.

This error is similar to this thread:

Django hangs when I execute this code:

def start(request):
        if request.user.is_authenticated():
                output = Popen(["/usr/local/tomcat/bin/"], stdout=PIPE).communicate()[0]
                foo ="a"
                return render_to_response('cms/templates/list.html', {'logs': foo})

                return HttpResponseRedirect("/accounts/login")

Change History (7)

comment:1 Changed 10 years ago by namename12

def start(request):<br>

if request.user.is_authenticated():<br>

output = Popen(usr/local/tomcat/bin/, stdout=PIPE).communicate()[0]<br>
foo ="a"<br>
return render_to_response('cms/templates/list.html', {'logs': foo})<br>


return HttpResponseRedirect("/accounts/login")<br>

comment:2 Changed 10 years ago by Karen Tracey

Description: modified (diff)

comment:3 Changed 9 years ago by Jacob

milestone: 1.1
Triage Stage: UnreviewedAccepted

comment:4 Changed 9 years ago by Jacob

Resolution: worksforme
Status: newclosed

I'm not sure this is a bug at all. That is, Popen.communicate() is supposed to block until stdin reaches EOF ( And that's exactly what happens when I spawn processes from a Django view: when the process completes, so does the view.

comment:5 Changed 9 years ago by stevecrozz@…

Resolution: worksforme
Status: closedreopened

I'd call this a bug, and its affecting me.

The django development server is able to start a background process, but for some reason it must block until the sub process dies. Place something like this in a view and you'll get your response 5 seconds later, Popen.communicate() is not needed to reproduce it:

subprocess.Popen(['/bin/sleep', '5'])
return HttpResponse(u'That sure took a while!')

Also see #4953 and #3712

comment:6 Changed 9 years ago by Alex Gaynor

Resolution: worksforme
Status: reopenedclosed

This bug was closed by a core developer, if you disagree please bring this up for discussion ont he django-development mailiing list.

comment:7 Changed 7 years ago by Jacob

milestone: 1.1

Milestone 1.1 deleted

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