[Zope-dev] Re: [Zope] select.error: (4, 'Interrupted system call')

[John Ziniti]

Thanks, Toby ... my asyncore has no try/except:

from $PYTHON_SOURCE/Lib/asyncore.py

       for fd, obj in map.items():
            if obj.readable():
                r.append (fd)
            if obj.writable():
                w.append (fd)
        r,w,e = select.select (r,w,e, timeout)

        if DEBUG:
            print r,w,e

What's up with that.


On Thu, 16 Aug 2001 16:12:35 +0100
Toby Dickenson <tdickenson@devmail.geminidataloggers.co.uk> wrote:

> On Thu, 16 Aug 2001 10:57:12 -0400, John Ziniti
> <jziniti@speakeasy.org> wrote:
> 
> >I am moving this thread over from the zope list in the
> >hope that someone here may have more insight into the
> >nature of this problem, and perhaps how to go about 
> >better diagnosing/fixing the problem.
> >
> >To sum up:  Under apparently random circumstances and 
> >rather mild amounts of traffic, Zope is crashing and
> >printing the Traceback below to the console. This is
> >Zope-2.4.0, Python-2.1.1 on SunOS 5.8/Sparc.
> >
> >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')
> >
> >Any ideas?
> 
> Im not using that version of Zope or Python, but in every version of
> asyncore I have seen the call to select is wrapped with a try/except
> that traps EINTR, and retries. The version I happen to be using at the
> moment looks like:
> 
>             try: r,w,e = select.select (r,w,e, timeout)
>             except select.error, v:
>                 if v[0] != EINTR: raise
>             else: break
> 
> Unless your version is different, that traceback 'shouldnt happen'
> 
> Toby Dickenson
> tdickenson@geminidataloggers.com
> 
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-- 
John Ziniti
Channing Laboratory
Brigham and Women's Hospital
181 Longwood Avenue
Brookline, MA 02115
john.ziniti@channing.harvard.edu