[medusa] Re: Hideously long selects?

[Jim Fulton]

Skip Montanaro wrote:
> 
> I'm using the ZServer component of Zope (but nothing else) behind an Apache
> serving as a proxy. I've noticed situations where it seems like I my
> ZServer process is hung, but when I connect to it with strace (Linux RH 5.2)
> I see it stalled in a select waiting on a lot of input file descriptors with
> an absurdly long timeout (typically 30 seconds):
> 
> select(33, [6 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 32], [], [], {30, 0}
> 
> I'm not much of a select expert, but it seems to me that this is what's
> causing my problem. Let's assume all those file descriptors are wacko web
> browsers (not a big stretch), so they aren't going to send input any time
> soon, so it will be a *long* time before Medusa falls out of the select call
> and gets around to thinking about new connections, right? Shouldn't the
> timeout be substantially shorter, 0.5-2.0 seconds perhaps?
> 
> I haven't checked the medusa code yet (that's where I'm headed next), but I
> thought I'd ask and see if I'm way off-base before I start messing around in
> detail.

Skip,

What version of Zope are you running? I beleave that this is due to a 
bug that was fixed in the Zope 2.0 beta 5. 

Jim

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