Message 64136 - Python tracker

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Author	Pankrat
Recipients	Pankrat, benjamin.peterson, jyasskin
Date	2008-03-20.01:32:48
SpamBayes Score	0.42884114
Marked as misclassified	No
Message-id	<1205976772.37.0.221961465006.issue2320@psf.upfronthosting.co.za>
In-reply-to

Content
Hi, I narrowed the problem down to the creation of the error pipe in _execute_child: >> errpipe_read, errpipe_write = os.pipe() >> self._set_cloexec_flag(errpipe_write) If I protect these two lines with a lock, I cannot reproduce the hang anymore (tested against Python 2.5.1). I'm not yet sure why this should be atomic (as there are no classic race condition problems involved AFAICT). By the way, this is on Linux: > uname -a Linux jade 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux

Hi, I narrowed the problem down to the creation of the error pipe in
_execute_child:

>> errpipe_read, errpipe_write = os.pipe()
>> self._set_cloexec_flag(errpipe_write)

If I protect these two lines with a lock, I cannot reproduce the hang
anymore (tested against Python 2.5.1).

I'm not yet sure why this should be atomic (as there are no classic race
condition problems involved AFAICT).

By the way, this is on Linux:
> uname -a
Linux jade 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686
GNU/Linux

History
Date	User	Action	Args
2008-03-20 01:32:52	Pankrat	set	spambayes_score: 0.428841 -> 0.42884114 recipients: + Pankrat, jyasskin, benjamin.peterson
2008-03-20 01:32:52	Pankrat	set	spambayes_score: 0.428841 -> 0.428841 messageid: <1205976772.37.0.221961465006.issue2320@psf.upfronthosting.co.za>
2008-03-20 01:32:51	Pankrat	link	issue2320 messages
2008-03-20 01:32:50	Pankrat	create