[Zope] EAGAIN errors crashing ZServer Aiieeee!!!!

[Jon Prettyman]

Well, after more poking around and experimenting, I'm able to make an
strace look like what my crashing server does by following these
steps...

start Zope (z2.py)
wait till everybody starts
attach an strace to child z2
wait till strace output shows I'm in select
send child z2 a SEGV

strace output matches what I see in production
event.log matches what I see in production

Now that I've figured this out, I managed to get ulimit set up so that
I will get a core file the next time this happens.

Let's hang on till I see the core.

I'm also going to play with getting gdb to work nicely.  I'm not sure
why this is failing yet.

-Jon

Michel Pelletier <michel@digicool.com> writes:

> 
> But fs/select.c(sys_select) (in the linux kernel) DOES return
> ERESTARTNOHAND of do_select returns a negative value.  This is, of
> course, not documented in the select man page...  come to think of it,
> it looks like the linux kernel returns ERESTARTNOHAND instead of EINTER
> because (quoting the source comments) "ERESTARTSYS [instead of EINTER]
> breaks at lest the xview clock binary, so I'm trying ERESTARTNOHAND
> which restart only when you want to" [block comments are mine].
> 
> Fishy.
> 
> -Michel