[Zope] select.error: (4, 'Interrupted system call')
J. Cone
jcone@g8labs.com
Thu, 16 Aug 2001 14:58:48 +0100
Could do.
The old unix semantics say you deliver a signal to a process. After the
process has split itself into a bunch of threads, it's unclear which one
will get to handle it. I suspect SunOS favours ones that are blocked,
which would make sense if they were blocked in sigsuspend, waiting for a
signal, but that's not your situation :-)
This conversation may belong on the zope-devel mailing list, where I expect
they have people who understand which signals Zope is supposed to accept,
and how.
At 09:38 16/08/01 -0400, John Ziniti wrote:
>I just have a hunch this problem has something to do with
>threads, but I don't know why. Does that make any sense?
>
>from $PYTHON_SOURCE/Modules/selectmodule.c:
>
> Py_BEGIN_ALLOW_THREADS
> n = select(max, &ifdset, &ofdset, &efdset, tvp);
> Py_END_ALLOW_THREADS
>
> if (n < 0) {
> PyErr_SetFromErrno(SelectError);
>
>Man, I hate Solaris! I want my Linux box back!
>
>
>
>On Thu, 16 Aug 2001 13:56:45 +0100
>"J. Cone" <jcone@g8labs.com> wrote:
>
>> In my application area, an error like that would mean:
>> - you blocked on a set of file descriptors
>> - either
>> - someone tried to kill you, so you clean up and then exit
>> or
>> - a timer went off so you handle it and then block again
>>
>> Is it possible to handle signals in python and find out who's sending them?
>>
>> Is it running in a terminal
>> (could be ^c'd)
>> or as a daemon
>> (could get SIGTERM on change of run-level)
>> ?
>>
>> Do any other processes on this box incurr stray fingers of G_d?
>>
>> At 08:40 16/08/01 -0400, Chris McDonough wrote:
>> >Geez. I'm not sure, John. This error is being raised by the OS in the
>> >middle of a system call. I don't know enough about Solaris to be able
>> >to give you any direction. Perhaps someone else can chime in? Anybody
>> >else seen this?
>> >
>> >John Ziniti wrote:
>> >> This is SunOS 5.8 running on a Sparc.
>> >>
>> >> On Wed, 15 Aug 2001 17:25:10 -0400
>> >> "Chris McDonough" <chrism@zope.com> wrote:
>> >>
>> >>
>> >>>THis is an odd error... what OS?
>> >>>
>> >>>----- Original Message -----
>> >>>From: "John Ziniti" <jziniti@speakeasy.org>
>> >>>To: <zope@zope.org>
>> >>>Sent: Wednesday, August 15, 2001 5:11 PM
>> >>>Subject: [Zope] select.error: (4, 'Interrupted system call')
>> >>>
>> >>>
>> >>>
>> >>>>Hey all,
>> >>>>
>> >>>>I've been getting this all day today since I upgraded
>> >>>>to Python 2.1.1 and Zope-2.4.0. It seems to happen
>> >>>>randomly, but mostly when I am moving around the ZMI,
>> >>>>the more I move around, the more likely it is to occur.
>> >>>>
>> >>>>It also brings down the Zope server, requiring a restart
>> >>>>and is thuis rather annoying. Any ideas on causes, fixes,
>> >>>>hunches? The traceback (printed to console) follows.
>> >>>>
>> >>>>Traceback (most recent call last):
>> >>>> File "/u01/zope/Zope-2.4.0-src/z2.py", line 774, in ?
>> >>>> asyncore.loop()
>> >>>> File "/u01/zope//lib/python2.1/asyncore.py", line 194, in loop
>> >>>> poll_fun (timeout, map)
>> >>>> File "/u01/zope//lib/python2.1/asyncore.py", line 86, in poll
>> >>>> r,w,e = select.select (r,w,e, timeout)
>> >>>>select.error: (4, 'Interrupted system call')
>> >>>>
>> >>>>
>> >>>>Thanks in advance,
>> >>>>
>> >>>>Ziniti
>> >>>>
>> >>>>
>> >>>>--
>> >>>>John Ziniti
>> >>>>Channing Laboratory
>> >>>>Brigham and Women's Hospital
>> >>>>181 Longwood Avenue
>> >>>>Brookline, MA 02115
>> >>>>john.ziniti@channing.harvard.edu
>> >>>>
>> >>>>_______________________________________________
>> >>>>Zope maillist - Zope@zope.org
>> >>>>http://lists.zope.org/mailman/listinfo/zope
>> >>>>** No cross posts or HTML encoding! **
>> >>>>(Related lists -
>> >>>> http://lists.zope.org/mailman/listinfo/zope-announce
>> >>>> http://lists.zope.org/mailman/listinfo/zope-dev )
>> >>>>
>> >>>>
>> >>>
>> >>>_______________________________________________
>> >>>Zope maillist - Zope@zope.org
>> >>>http://lists.zope.org/mailman/listinfo/zope
>> >>>** No cross posts or HTML encoding! **
>> >>>(Related lists -
>> >>> http://lists.zope.org/mailman/listinfo/zope-announce
>> >>> http://lists.zope.org/mailman/listinfo/zope-dev )
>> >>>
>> >>>
>> >>
>> >>
>> >
>> >
>> >--
>> >Chris McDonough Zope Corporation
>> >http://www.zope.org http://www.zope.com
>> >"Killing hundreds of birds with thousands of stones"
>> >
>> >
>> >_______________________________________________
>> >Zope maillist - Zope@zope.org
>> >http://lists.zope.org/mailman/listinfo/zope
>> >** No cross posts or HTML encoding! **
>> >(Related lists -
>> > http://lists.zope.org/mailman/listinfo/zope-announce
>> > http://lists.zope.org/mailman/listinfo/zope-dev )
>> >
>> >
>>
>>
>> _______________________________________________
>> Zope maillist - Zope@zope.org
>> http://lists.zope.org/mailman/listinfo/zope
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>>
>
>
>--
>John Ziniti
>Channing Laboratory
>Brigham and Women's Hospital
>181 Longwood Avenue
>Brookline, MA 02115
>john.ziniti@channing.harvard.edu
>
>_______________________________________________
>Zope maillist - Zope@zope.org
>http://lists.zope.org/mailman/listinfo/zope
>** No cross posts or HTML encoding! **
>(Related lists -
> http://lists.zope.org/mailman/listinfo/zope-announce
> http://lists.zope.org/mailman/listinfo/zope-dev )
>
>