[Mod_nss-list] nss_engine_io error message

Erica Johansson elj at elj.us
Wed Apr 27 00:13:38 UTC 2011


I'm having an issue with one of our production servers that utilizes
mod_nss.  Httpd shortly after a restart will be ultimately max out the cpu.
This is a rather robust machine (quad core, 2G RAM, but the memory is barely
touched) with not much traffic passing through ultimately.  Max would be
~200-250 in an hour, excluding the health checks from the load balancer.
This does not serve out content, but acts purely as a proxy/reverse proxy.
There is really nothing in the logs of note unfortunately.  The only thing
I've found in the logs that raises any question at all in my mind is this in
the error_log:

[Mon Apr 25 06:08:50 2011] [debug] nss_engine_io.c(656): SSL connection
destroyed without being closed

Here is the complete attempt:
[Mon Apr 25 06:08:50 2011] [debug] proxy_util.c(1488): [client 10.71.47.129]
proxy: https: found worker https://server01.domain.com/D2EP/ for
https://server01.domain.com/D2EP/msg_data/submit
[Mon Apr 25 06:08:50 2011] [debug] mod_proxy.c(966): Running scheme https
handler (attempt 0)
[Mon Apr 25 06:08:50 2011] [debug] mod_proxy_http.c(1976): proxy: HTTP:
serving URL https://server01.domain.com/D2EP/msg_data/submit
[Mon Apr 25 06:08:50 2011] [debug] proxy_util.c(2044): proxy: HTTPS: has
acquired connection for (server01.domain.com)
[Mon Apr 25 06:08:50 2011] [debug] proxy_util.c(2102): proxy: connecting
https://server01.domain.com/D2EP/msg_data/submit to server01.g
ovtrip.com:443
[Mon Apr 25 06:08:50 2011] [debug] proxy_util.c(2195): proxy: connected
/D2EP/msg_data/submit to server01.domain.com:443
[Mon Apr 25 06:08:50 2011] [debug] nss_engine_io.c(656): SSL connection
destroyed without being closed
[Mon Apr 25 06:08:50 2011] [debug] proxy_util.c(2286): proxy: HTTPS: backend
socket is disconnected.

We have many of those throughout the day...with all of them after the same
attempted connection. (I would estimate that 90% of that connection attempt
results in the proceeding error message, today looks like 206 were triggered
thus far)

My question ultimately is how that could potentially impact the httpd
server?  (Sorry, asking here since it's mod_nss that is complaining about
it)

Something is clearly triggering something within the server, and I want to
make sure I'm not missing something related to mod_nss.

Thank you for your time!
Erica
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