[issue12488] multiprocessing.Connection does not communicate pipe closure between parent and child

[Luke]

Luke <lcamp...@email.unc.edu> added the comment:

That's interesting, thanks for your response.

It is also a bit awkward..
Might I recommend adding a note to the documentation? It is not really
intuitive that each child should need to close the end of the pipe it isn't
using (especially since it is possible to create a child that has no
explicit access to that end of the pipe, even though it has inherited the
file descriptor).

2011/7/4 Charles-François Natali <rep...@bugs.python.org>

>
> Charles-François Natali <neolo...@free.fr> added the comment:
>
> That's because the other end of the pipe (p1) is open in the child process
> (FDs are inherited on fork()).
> Just add
> p1.close()
>
> at the beginning of fn() and you'll get EOF.
> Closing as invalid.
>
> ----------
> nosy: +neologix
> resolution:  -> invalid
> stage:  -> committed/rejected
> status: open -> closed
>
> _______________________________________
> Python tracker <rep...@bugs.python.org>
> <http://bugs.python.org/issue12488>
> _______________________________________
>

----------
Added file: http://bugs.python.org/file22569/unnamed

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue12488>
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That&#39;s interesting, thanks for your response.<div><br></div><div>It is also 
a bit awkward.. <div>Might I recommend adding a note to the documentation? It 
is not really intuitive that each child should need to close the end of the 
pipe it isn&#39;t using (especially since it is possible to create a child that 
has no explicit access to that end of the pipe, even though it has inherited 
the file descriptor). <br>

<div><br><br><div class="gmail_quote">2011/7/4 Charles-François Natali <span 
dir="ltr">&lt;<a 
href="mailto:rep...@bugs.python.org";>rep...@bugs.python.org</a>&gt;</span><br><blockquote
 class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc 
solid;padding-left:1ex;">

<br>
Charles-François Natali &lt;<a 
href="mailto:neolo...@free.fr";>neolo...@free.fr</a>&gt; added the comment:<br>
<br>
That&#39;s because the other end of the pipe (p1) is open in the child process 
(FDs are inherited on fork()).<br>
Just add<br>
p1.close()<br>
<br>
at the beginning of fn() and you&#39;ll get EOF.<br>
Closing as invalid.<br>
<br>
----------<br>
nosy: +neologix<br>
resolution:  -&gt; invalid<br>
stage:  -&gt; committed/rejected<br>
status: open -&gt; closed<br>
<div><div></div><div class="h5"><br>
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Python tracker &lt;<a 
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&lt;<a href="http://bugs.python.org/issue12488"; 
target="_blank">http://bugs.python.org/issue12488</a>&gt;<br>
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</div></div></blockquote></div><br></div></div></div>

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