Sure! I've added it to the post on github. I've slightly edited the log out of paranoia (replacing a customer ID and auth key).<br><br>I can confirm now that I ran this proxy with the upstreamfair module overnight and it didn't crash at all. I can't get it to preferentially serve to localhost, though, as it doesn't support 'backup' as a server attribute, and doesn't seem to really use the weights, so that's suboptimal.<br>
<br>Anything else I can add to help troubleshooting this? Anything you'd like from the core dump?<br><br><div class="gmail_quote">On Mon, May 2, 2011 at 2:04 PM, Maxim Dounin <span dir="ltr"><<a href="mailto:mdounin@mdounin.ru">mdounin@mdounin.ru</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hello!<br>
<div><div></div><div class="h5"><br>
On Sun, May 01, 2011 at 05:54:17PM -0700, Stephen Weeks wrote:<br>
<br>
> I've currently got a pool of systems running nginx proxying to a pool of<br>
> systems running apache. I'm trying to move to running nginx locally on the<br>
> apache hosts instead of separate systems to avoid the extra network hop,<br>
> make more-efficient use of resources, and enable some future development<br>
> (including migrating to running our application on nginx via fastcgi instead<br>
> of apache, ideally). we've currently got some significant architecture<br>
> built up around apache, so converting right now is uncomfortable.<br>
><br>
> Ideally, I'd like nginx to just serve from localhost, but fail over to the<br>
> rest of the pool when localhost in unavailable, so in my upstream I have<br>
> every server except for localhost set as 'backup'. I'm otherwise running<br>
> identical configurations of apache and nginx on a single system together as<br>
> used in the rest of the two pools. This works exactly as expected, except<br>
> that I get a few crashes of nginx workers every minute. This only happens<br>
> when proxying to the local system. If I proxy anywhere else, it works<br>
> fine. Other proxies can serve from this system without trouble. I see this<br>
> same behaviour on other hosts when I build them the same way, so it's not an<br>
> error with the host. I see this crash on 0.7.65, 0.8.54, and 1.0.0, running<br>
> on Ubuntu 10.04 LTS. I see this crash whether I'm connecting to 127.0.0.1<br>
> or the host's local IP. I see this crash whether I'm listening on *:80 or<br>
> <public ip>:80. I see this crash whether I'm connecting to :80 or running<br>
> apache on a different port and connecting to :81. I see this crash whether<br>
> I'm running ubuntu's "nginx-light" configuration, or their "nginx-full"<br>
> configuration. I see no errors logged from apache.<br>
><br>
> 1) I'd really love to make this work, so if there's anything else I can try,<br>
> any additional debugging information I can give, I'd appreciate it.<br>
> 2) Nginx has been very useful to me so far, so I thought you'd appreciate a<br>
> bug report.<br>
><br>
> Posted on github, I have a problem description, section of a debug log, my<br>
> (slightly edited: flattened includes and stripped an IP) nginx.conf, a gdb<br>
> backtrace, and some additional information I was asked for when looking for<br>
> help on IRC. This is everything I've been able to come up with that sounds<br>
> plausibly relevant.<br>
><br>
> <a href="https://gist.github.com/1574dbaf3a3dcda920a2" target="_blank">https://gist.github.com/1574dbaf3a3dcda920a2</a><br>
><br>
> Any help?<br>
<br>
</div></div>Could you please provide:<br>
<br>
1. nginx -V output<br>
<br>
2. Full debug log for '*60' connection (the one which triggered<br>
abort in glibc), the one you provided contatins only last part of<br>
the connection in question. Running grep -F ' 27772#0: *60 ' on<br>
original debug log should produce something useable.<br>
<br>
Maxim Dounin<br>
<br>
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</blockquote></div><br>