[Iolib-devel] poll and EAGAIN

Stelian Ionescu sionescu at cddr.org
Fri Oct 24 20:19:59 UTC 2014

On Fri, 2014-06-20 at 01:18 +0200, Attila Lendvai wrote:
> hi!
> i started to receive errors from poll due to EAGAIN and it broke the
> CGI handling in our web server. the issue is not urgent, but i thought
> i'll report it.
> if i add the following to PROCESS-POLL-REVENTS under the case
>   (error 'poll-error :fd fd :identifier (princ-to-string
> (iolib.syscalls:errno))))
> then i see 11, which is EAGAIN.
> shouldn't that be handled by iolib behind my back? or am i doing
> somehting wrong?
> the sympthoms are that the request is not even parsed properly (iiuc),
> but when i use View Source in chrome then it seems to work. it's maybe
> something about the request not arriving in one packet or somesuch?
> but my network foo is limited...
> the code in question is in hu.dwim.web-server.

Hi Attila, if you can grab a stacktrace, it would be very useful. I
thought I handled all places where EAGAIN could be triggered, but
obviously I haven't.

Stelian Ionescu a.k.a. fe[nl]ix
Quidquid latine dictum sit, altum videtur.

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