apache?

Kenny Lussier klussier at gmail.com
Thu Apr 9 15:43:25 EDT 2009


On Tue, Apr 7, 2009 at 6:31 PM, Kevin D. Clark <kevin_d_clark at comcast.net>wrote:

>
> [you sent this on Saturday, and I just received this on Tuesday]
>
>
>
> Kenny Lussier writes:
>
> > A few days ago, we upgraded the front-end apache servers from RHEL3
> running
> > httpd-2.0.47 to RHEL5, httpd-2.2.3-22. Since then, we have been
> experiencing
> > strange intermittant outages. We see connections to our firewall on port
> > 443, and we see SOME traffic on the apache servers, but most people
> trying
> > to connect are timing out. This lasts for about 5 minutes. There are no
> > errors logged in messages or in apache's error_log. However, seconds
> AFTER
> > the problem clears up, I see:
>
> Can you provide a tcpdump log that (1) isn't gigantic (2) includes an
> example of a session that is affected by this problem (3) (optional,
> but nice to have) a flow that seems to work just fine.


It looks like the problem was before the Apache server, either at one of the
firewalls or the external router. Traffic was being queued, then slamming
the Apache proxy.

Thanks,
Kenny
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