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From sniederme...@cob.org
Subject [users@httpd] Reverse proxying errors
Date Mon, 12 Mar 2007 22:43:24 GMT

I've been trying to track down a resolution to this issue for some time now
and still haven't found anything. If anyone has ideas on what might be
happening and how to fix it, I would greatly appreciate a hand.

Summary

We're using Apache to reverse proxy a number of web applications.  The
symptoms described below occur periodically for all of those application
web servers which are a mix (IBM HTTP, Microsoft IIS 6, Microsft IIS 5,
etc).

Symptoms

Pages or sometimes images take much longer to load than the page (sometimes
30+ seconds or more).
Sometimes pages fail to load after 30+ seconds.  However, if you click the
browser refresh it loads immediately.
We've had reports from site visitors of not being able to pull up pages
periodically.
There doesn't seem to be a consistent pattern (can't replicate the behavior
on-demand).
Haven't confirmed the symptoms directly correlate with the errors being
logged (difficult to collect this info from site visitors)

The reverse proxy server access logs show a bunch of 503 errors when apache
logs the following error:

(OS 10061)No connection could be made because the target machine actively
refused it.  : proxy: HTTP: attempt to connect to 10.101.2.28:80
(10.101.2.28) failed

The reverse proxy server access logs show a 502 error whenever apache logs
the following error and it looks like there might be a correlation between
search engines spidering the site and these error log entries (e.g. the one
illustrated below was from inktomisearch.com):

[client 74.6.68.116] proxy: Error reading from remote server returned by
/documents/planning/permit-center/forms/Innocent_Purchaser_Verification.pdf
[client 74.6.68.116] proxy: error reading status line from remote server
10.101.2.28

Configuration

Reverse Proxy web server: Apache 2.2.4; Windows 2003 SP1; 3.8Ghz Intel Xeon
Processor; 3.5GB RAM
Back-end application servers:  Windows 2003 SP1; IBM HTTP web server /
Windows 2003 SP1; Microsoft IIS 6 / etc

httpd.conf*************************************************************************************
ServerRoot "c:/Apache2"
Listen X.X.X.X:80

LoadModule actions_module modules/mod_actions.so
LoadModule alias_module modules/mod_alias.so
LoadModule asis_module modules/mod_asis.so
LoadModule auth_basic_module modules/mod_auth_basic.so
LoadModule authn_default_module modules/mod_authn_default.so
LoadModule authn_file_module modules/mod_authn_file.so
LoadModule authz_default_module modules/mod_authz_default.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule authz_user_module modules/mod_authz_user.so
LoadModule autoindex_module modules/mod_autoindex.so
LoadModule cache_module modules/mod_cache.so
LoadModule cgi_module modules/mod_cgi.so
LoadModule dir_module modules/mod_dir.so
LoadModule env_module modules/mod_env.so
LoadModule imagemap_module modules/mod_imagemap.so
LoadModule include_module modules/mod_include.so
LoadModule isapi_module modules/mod_isapi.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule log_rotate_module modules/mod_log_rotate.so
LoadModule mem_cache_module modules/mod_mem_cache.so
LoadModule mime_module modules/mod_mime.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_html_module modules/mod_proxy_html/mod_proxy_html.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule speling_module modules/mod_speling.so
LoadModule status_module modules/mod_status.so
LoadModule userdir_module modules/mod_userdir.so
LoadModule ssl_module modules/mod_ssl.so

Win32DisableAcceptEx

ErrorLog logs/error.log
LogLevel info
DefaultType text/plain

Include conf/extra/vhosts.conf
Include conf/extra/ssl.conf

SetEnv force-proxy-request-1.0 1
SetEnv proxy-nokeepalive 1

vhosts.conf*****************************************************************************************

NameVirtualHost *:80
<VirtualHost *:80>
      ServerName cob.org
      ServerAlias www.cob.org
      DocumentRoot "c:/Apache2/cob"
      <Directory "c:/Apache2/cob">
            Options FollowSymLinks
            AllowOverride None
            Order allow,deny
            Allow from all
      </Directory>
<IfModule alias_module>

RewriteEngine on
RewriteLog "c:/Apache2/logs/cob_rewrite.log"

DirectorySlash On
ProxyRequests Off
ProxyPass /server-status !

ProxyPass / http://10.101.2.28/
ProxyPassReverse / http://10.101.2.28/
</VirtualHost>

Sample Error Log Entries

[Fri  Mar   9     22:09:13    2007] [error]     [client 74.6.69.100] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Fri  Mar   9     22:09:13    2007] [error]     [client 74.6.69.100] proxy:
error reading status line from remote server 10.101.2.28
[Fri  Mar   9     22:15:42    2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/cob/contracts.nsf/ByParty
[Fri  Mar   9     22:15:42    2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Fri  Mar   9     23:26:00    2007] [error]     [client 74.6.72.244] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Fri  Mar   9     23:26:00    2007] [error]     [client 74.6.72.244] proxy:
error reading status line from remote server 10.101.2.28
[Fri  Mar   9     23:26:41    2007] [error]     [client 74.6.68.116] proxy:
Error reading from remote server returned by
/documents/planning/permit-center/forms/Innocent_Purchaser_Verification.pdf
[Fri  Mar   9     23:26:41    2007] [error]     [client 74.6.68.116] proxy:
error reading status line from remote server 10.101.2.28
[Fri  Mar   9     23:27:29    2007] [error]     [client 216.9.20.109]
proxy: Error reading from remote server returned by
/parks/recreation/images/2005-spring-leisure-guide.jpg, referer:
http://www.cob.org/index.htm
[Fri  Mar   9     23:27:29    2007] [error]     [client 216.9.20.109]
proxy: error reading status line from remote server 10.101.2.28, referer:
http://www.cob.org/index.htm
[Fri  Mar   9     23:28:03    2007] [error]     [client 74.6.85.208] proxy:
Error reading from remote server returned by /bpl/children/index.htm
[Fri  Mar   9     23:28:03    2007] [error]     [client 74.6.85.208] proxy:
error reading status line from remote server 10.101.2.28
[Fri  Mar   9     23:28:35    2007] [error]     [client 74.6.71.162] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Fri  Mar   9     23:28:35    2007] [error]     [client 74.6.71.162] proxy:
error reading status line from remote server 10.101.2.28
[Fri  Mar   9     23:29:19    2007] [error]     [client 72.30.177.215]
proxy: Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Fri  Mar   9     23:29:19    2007] [error]     [client 72.30.177.215]
proxy: error reading status line from remote server 10.101.2.28
[Fri  Mar   9     23:30:07    2007] [error]     [client 74.6.74.58] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Fri  Mar   9     23:30:07    2007] [error]     [client 74.6.74.58] proxy:
error reading status line from remote server 10.101.2.28
[Fri  Mar   9     23:31:26    2007] [error]     [client 74.6.70.82] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Fri  Mar   9     23:31:26    2007] [error]     [client 74.6.70.82] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:46:09     2007] [error]     [client 74.6.72.176] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Sat  Mar   10    1:46:09     2007] [error]     [client 74.6.72.176] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:46:56     2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/web/LEGILOG.nsf/423f25dc0bb7f5ea882566f0006a8054
[Sat  Mar   10    1:46:56     2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:48:27     2007] [error]     [client 66.231.188.144]
proxy: Error reading from remote server returned by
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b
[Sat  Mar   10    1:48:27     2007] [error]     [client 66.231.188.144]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:50:06     2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/documents/mayor/boards-commissions/neighborhood/MNAC Minutes 10-11-06.pdf
[Sat  Mar   10    1:50:06     2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:51:24     2007] [error]     [client 74.6.70.236] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Sat  Mar   10    1:51:24     2007] [error]     [client 74.6.70.236] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:52:34     2007] [error]     [client 74.6.67.172] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Sat  Mar   10    1:52:34     2007] [error]     [client 74.6.67.172] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:53:19     2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/web/LEGILOG.nsf/5eb8da578b32363888256988006f1c99/da36f1528cc134498825727d00677c5d
[Sat  Mar   10    1:53:19     2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:55:47     2007] [error]     [client 74.6.67.123] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Sat  Mar   10    1:55:47     2007] [error]     [client 74.6.67.123] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:56:42     2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/web/LEGILOG.nsf/423f25dc0bb7f5ea882566f0006a8054/433c9772ff81bca48825709f006d6ad0
[Sat  Mar   10    1:56:42     2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:58:56     2007] [error]     [client 72.30.177.237]
proxy: Error reading from remote server returned by
/cob/HElog.nsf/frmWeb/7AD2405CB44962CD88256C6300816F0D
[Sat  Mar   10    1:58:56     2007] [error]     [client 72.30.177.237]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    1:59:56     2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/web/LEGILOG.nsf/5eb8da578b32363888256988006f1c99
[Sat  Mar   10    1:59:56     2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    2:01:07     2007] [error]     [client 74.6.70.233] proxy:
Error reading from remote server returned by
/cob/dgi.nsf/e9a8b04c7b9d4c138825692000714046/08838005f9e31cc388256b030076ca3a
[Sat  Mar   10    2:01:07     2007] [error]     [client 74.6.70.233] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    6:53:33     2007] [info]      [client 138.246.7.29] (OS
10053)An established connection was aborted by the software in your host
machine.  : core_output_filter: writing data to the network
[Sat  Mar   10    8:35:35     2007] [error]     [client 74.6.71.57] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Sat  Mar   10    8:35:35     2007] [error]     [client 74.6.71.57] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    8:36:17     2007] [error]     [client 71.35.170.172]
proxy: Error reading from remote server returned by
/images/green-power-partner-ad.jpg, referer: http://www.cob.org/index.htm
[Sat  Mar   10    8:36:17     2007] [error]     [client 71.35.170.172]
proxy: error reading status line from remote server 10.101.2.28, referer:
http://www.cob.org/index.htm
[Sat  Mar   10    8:36:59     2007] [error]     [client 74.6.76.14] proxy:
Error reading from remote server returned by /robots.txt
[Sat  Mar   10    8:36:59     2007] [error]     [client 74.6.76.14] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    8:37:42     2007] [error]     [client 71.35.170.172]
proxy: Error reading from remote server returned by /favicon.ico
[Sat  Mar   10    8:37:42     2007] [error]     [client 71.35.170.172]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    8:38:19     2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/web/legilog.nsf/e8c8ef2aa63aef63882564550053179c
[Sat  Mar   10    8:38:19     2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    8:39:17     2007] [error]     [client 66.231.188.144]
proxy: Error reading from remote server returned by
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b
[Sat  Mar   10    8:39:17     2007] [error]     [client 66.231.188.144]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    15:06:51    2007] [error]     [client 74.6.70.158] proxy:
Error reading from remote server returned by
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Sat  Mar   10    15:06:51    2007] [error]     [client 74.6.70.158] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    15:07:40    2007] [error]     [client 63.241.61.7] proxy:
Error reading from remote server returned by /web/council.nsf
[Sat  Mar   10    15:07:40    2007] [error]     [client 63.241.61.7] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    21:57:29    2007] [error]     [client 74.6.86.12] proxy:
Error reading from remote server returned by /finance/reports.htm
[Sat  Mar   10    21:57:29    2007] [error]     [client 74.6.86.12] proxy:
error reading status line from remote server 10.101.2.28
[Sat  Mar   10    21:57:58    2007] [error]     [client 66.249.65.232]
proxy: Error reading from remote server returned by
/web/legilog.nsf/e8c8ef2aa63aef63882564550053179c
[Sat  Mar   10    21:57:58    2007] [error]     [client 66.249.65.232]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    22:03:54    2007] [error]     [client 66.231.188.144]
proxy: Error reading from remote server returned by
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b/97e26619da6868df8825615d0074f278
[Sat  Mar   10    22:03:54    2007] [error]     [client 66.231.188.144]
proxy: error reading status line from remote server 10.101.2.28
[Sat  Mar   10    22:10:29    2007] [error]     [client 71.112.220.10]
proxy: Error reading from remote server returned by
/btv10/images/btv10-ad.jpg, referer:
http://www.ci.bellingham.wa.us/index.htm
[Sat  Mar   10    22:10:29    2007] [error]     [client 71.112.220.10]
proxy: error reading status line from remote server 10.101.2.28, referer:
http://www.ci.bellingham.wa.us/index.htm
[Sun  Mar   11    2:23:14     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:14     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:14     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:15     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:16     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:16     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:17     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:17     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:23:18     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:19     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:19     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:23:19     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:20     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:20     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:20     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:23:20     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:20     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:21     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:21     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:23:22     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:22     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:22     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:23:23     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:23     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:23     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:23:23     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:23:23     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:04     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:04     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:04     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:04     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:04     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:05     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:05     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:05     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:06     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:06     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:06     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:06     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:06     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:06     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:06     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:07     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:08     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:08     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:08     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:08     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:08     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:09     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:09     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:09     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:10     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:10     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:10     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:10     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:11     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:11     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:11     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:11     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:11     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:11     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:11     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:11     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:11     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:11     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:12     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:12     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:12     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:12     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:13     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:13     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:13     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:13     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:13     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:13     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:15     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:15     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:15     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:15     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:15     2007] [error]     (OS 10061)No connection
could be made because the target machine actively refused it.  : proxy:
HTTP: attempt to connect to 10.101.2.28:80 (10.101.2.28) failed
[Sun  Mar   11    2:24:15     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     ap_proxy_connect_backend
disabling worker for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:15     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:16     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)
[Sun  Mar   11    2:24:16     2007] [error]     proxy: HTTP: disabled
connection for (10.101.2.28)


The error in action (debug log entries before and after the proxy error
event)

[Sun Mar 11 22:06:52 2007] [debug] proxy_util.c(1816): proxy: HTTP: has
released connection for (10.101.2.28)
[Sun Mar 11 22:07:01 2007] [debug] mod_proxy_http.c(54): proxy: HTTP:
canonicalising URL //10.101.2.28/parks/recreation/races/results.htm
[Sun Mar 11 22:07:01 2007] [debug] proxy_util.c(1378): [client
71.227.217.52] proxy: http: found worker http://10.101.2.28/ for
http://10.101.2.28/parks/recreation/races/results.htm, referer:
http://www.cob.org/parks/recreation/races/runnin-o-green.htm
[Sun Mar 11 22:07:01 2007] [debug] mod_proxy.c(777): Running scheme http
handler (attempt 0)
[Sun Mar 11 22:07:01 2007] [debug] mod_proxy_http.c(1662): proxy: HTTP:
serving URL http://10.101.2.28/parks/recreation/races/results.htm
[Sun Mar 11 22:07:01 2007] [debug] proxy_util.c(1798): proxy: HTTP: has
acquired connection for (10.101.2.28)
[Sun Mar 11 22:07:01 2007] [debug] proxy_util.c(1859): proxy: connecting
http://10.101.2.28/parks/recreation/races/results.htm to 10.101.2.28:80
[Sun Mar 11 22:07:01 2007] [debug] proxy_util.c(1955): proxy: connected
/parks/recreation/races/results.htm to 10.101.2.28:80
[Sun Mar 11 22:07:01 2007] [debug] proxy_util.c(2050): proxy: HTTP: fam 2
socket created to connect to 10.101.2.28
[Sun Mar 11 22:07:01 2007] [debug] proxy_util.c(2146): proxy: HTTP:
connection complete to 10.101.2.28:80 (10.101.2.28)
[Sun Mar 11 22:07:05 2007] [debug] mod_proxy_http.c(54): proxy: HTTP:
canonicalising URL //10.101.2.28
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b
[Sun Mar 11 22:07:05 2007] [debug] proxy_util.c(1378): [client
66.231.188.144] proxy: http: found worker http://10.101.2.28/ for
http://10.101.2.28
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b?OpenView&Start=14.9.7
&Count=30&Expand=17.8
[Sun Mar 11 22:07:05 2007] [debug] mod_proxy.c(777): Running scheme http
handler (attempt 0)
[Sun Mar 11 22:07:05 2007] [debug] mod_proxy_http.c(1662): proxy: HTTP:
serving URL http://10.101.2.28
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b?OpenView&Start=14.9.7
&Count=30&Expand=17.8
[Sun Mar 11 22:07:05 2007] [debug] proxy_util.c(1798): proxy: HTTP: has
acquired connection for (10.101.2.28)
[Sun Mar 11 22:07:05 2007] [debug] proxy_util.c(1859): proxy: connecting
http://10.101.2.28
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b?OpenView&Start=14.9.7
&Count=30&Expand=17.8 to 10.101.2.28:80
[Sun Mar 11 22:07:05 2007] [debug] proxy_util.c(1955): proxy: connected
/web/bmcode.nsf/30c2b313f243223f88255f9c007b495b?OpenView&Start=14.9.7
&Count=30&Expand=17.8 to 10.101.2.28:80
[Sun Mar 11 22:07:05 2007] [debug] proxy_util.c(2050): proxy: HTTP: fam 2
socket created to connect to 10.101.2.28
[Sun Mar 11 22:07:05 2007] [debug] proxy_util.c(2146): proxy: HTTP:
connection complete to 10.101.2.28:80 (10.101.2.28)
[Sun Mar 11 22:07:05 2007] [debug] mod_proxy_http.c(1448): proxy: start
body send
[Sun Mar 11 22:07:05 2007] [debug] mod_proxy_http.c(1537): proxy: end body
send
[Sun Mar 11 22:07:05 2007] [debug] proxy_util.c(1816): proxy: HTTP: has
released connection for (10.101.2.28)
[Sun Mar 11 22:07:09 2007] [error] [client 66.249.65.232] proxy: error
reading status line from remote server 10.101.2.28
[Sun Mar 11 22:07:09 2007] [error] [client 66.249.65.232] proxy: Error
reading from remote server returned by /cob/contracts.nsf/ByParty
[Sun Mar 11 22:07:09 2007] [debug] proxy_util.c(1816): proxy: HTTP: has
released connection for (10.101.2.28)
[Sun Mar 11 22:07:11 2007] [debug] mod_proxy_http.c(54): proxy: HTTP:
canonicalising URL //10.101.2.28/cob/bid.nsf/opportunties.gif
[Sun Mar 11 22:07:11 2007] [debug] proxy_util.c(1378): [client 63.76.213.5]
proxy: http: found worker http://10.101.2.28/ for http://10.101.2.28
/cob/bid.nsf/opportunties.gif
[Sun Mar 11 22:07:11 2007] [debug] mod_proxy.c(777): Running scheme http
handler (attempt 0)
[Sun Mar 11 22:07:11 2007] [debug] mod_proxy_http.c(1662): proxy: HTTP:
serving URL http://10.101.2.28/cob/bid.nsf/opportunties.gif
[Sun Mar 11 22:07:11 2007] [debug] proxy_util.c(1798): proxy: HTTP: has
acquired connection for (10.101.2.28)
[Sun Mar 11 22:07:11 2007] [debug] proxy_util.c(1859): proxy: connecting
http://10.101.2.28/cob/bid.nsf/opportunties.gif to 10.101.2.28:80
[Sun Mar 11 22:07:11 2007] [debug] proxy_util.c(1955): proxy: connected
/cob/bid.nsf/opportunties.gif to 10.101.2.28:80
[Sun Mar 11 22:07:11 2007] [debug] proxy_util.c(2050): proxy: HTTP: fam 2
socket created to connect to 10.101.2.28
[Sun Mar 11 22:07:11 2007] [debug] proxy_util.c(2146): proxy: HTTP:
connection complete to 10.101.2.28:80 (10.101.2.28)
[Sun Mar 11 22:07:11 2007] [debug] mod_proxy_http.c(1541): proxy: header
only
[Sun Mar 11 22:07:11 2007] [debug] proxy_util.c(1816): proxy: HTTP: has
released connection for (10.101.2.28)
[Sun Mar 11 22:07:12 2007] [debug] mod_proxy_http.c(54): proxy: HTTP:
canonicalising URL //10.101.2.28
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42
[Sun Mar 11 22:07:12 2007] [debug] proxy_util.c(1378): [client
72.30.177.189] proxy: http: found worker http://10.101.2.28/ for
http://10.101.2.28
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42?OpenView&Grid=5&Date=3042-07-02
[Sun Mar 11 22:07:12 2007] [debug] mod_proxy.c(777): Running scheme http
handler (attempt 0)
[Sun Mar 11 22:07:12 2007] [debug] mod_proxy_http.c(1662): proxy: HTTP:
serving URL http://10.101.2.28
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42?OpenView&Grid=5&Date=3042-07-02
[Sun Mar 11 22:07:12 2007] [debug] proxy_util.c(1798): proxy: HTTP: has
acquired connection for (10.101.2.28)
[Sun Mar 11 22:07:12 2007] [debug] proxy_util.c(1859): proxy: connecting
http://10.101.2.28
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42?OpenView&Grid=5&Date=3042-07-02
 to 10.101.2.28:80
[Sun Mar 11 22:07:12 2007] [debug] proxy_util.c(1955): proxy: connected
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42?OpenView&Grid=5&Date=3042-07-02
 to 10.101.2.28:80
[Sun Mar 11 22:07:12 2007] [debug] proxy_util.c(2050): proxy: HTTP: fam 2
socket created to connect to 10.101.2.28
[Sun Mar 11 22:07:12 2007] [debug] proxy_util.c(2146): proxy: HTTP:
connection complete to 10.101.2.28:80 (10.101.2.28)
[Sun Mar 11 22:07:12 2007] [debug] mod_proxy_http.c(1448): proxy: start
body send
[Sun Mar 11 22:07:12 2007] [debug] mod_proxy_http.c(1537): proxy: end body
send


Access log excerpt

10.101.2.29 - - [11/Mar/2007:02:23:13 -0800] "GET
/documents/gis/maps/transportation/circulation/south-circ.pdf HTTP/1.0" 503
323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:08 -0800] "GET
/cob/Contracts.nsf/0/321046d0f618fbdc882566570064006f/$FILE/C1979002.PDF
HTTP/1.0" 200 323584 "-" "gsa-crawler (Enterprise; MID-02119; )"
66.249.65.232 - - [11/Mar/2007:02:23:13 -0800] "GET
/web/legilog.nsf/423f25dc0bb7f5ea882566f0006a8054/7b225a80ba95fac18825709f006ddbb6?OpenDocument
 HTTP/1.1" 503 323 "-" "Mozilla/5.0 (compatible; Googlebot/2.1;
+http://www.google.com/bot.html)"
10.101.2.29 - - [11/Mar/2007:02:23:06 -0800] "GET
/cob/Contracts.nsf/0/21f16e7d166eb5cb88256e0d00717d59/$FILE/20030232A.pdf
HTTP/1.0" 200 389625 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:14 -0800] "GET
/cob/Contracts.nsf/0/7352138c3dd2ab1d8825708400609122/$FILE/20050378.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/cob/Contracts.nsf/0/f2cb9e674a41e5f188256be20055e36d/$FILE/20020274.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/web/boa.nsf/0/8bb83efe44d3f26488256acc0082051f?OpenDocument HTTP/1.0" 503
323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/cob/Contracts.nsf/0/5b71712ddd461c6c88256cee006556b6/$FILE/20030097.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:08 -0800] "GET
/cob/Contracts.nsf/0/d5032ae12f5f271088256f1c005a43a0/$FILE/20010372A.pdf
HTTP/1.0" 200 189760 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/cob/Contracts.nsf/0/188257c228d7e09b8825705b00800175/$FILE/20050338.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/web/civil.nsf/0/937b4379d0bfd08888256301007437f9?OpenDocument HTTP/1.0"
503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/cob/Contracts.nsf/0/9ff58df0f943719988256720006d12e2/$FILE/1998288A.PDF
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/cob/Contracts.nsf/0/32a99cfc44394eb6882571dc00703dc1/$FILE/20060400.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/web/boa.nsf/0/bcadfea43ac0f7d38825659d000306d4?OpenDocument HTTP/1.0" 503
323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:16 -0800] "GET
/cob/Contracts.nsf/frmWeb/CE5D52FB6E5DA1338825718E0062FABF?OpenDocument
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:15 -0800] "GET
/documents/mayor/budget/2007-cover-geninfo.pdf HTTP/1.0" 503 323 "-"
"gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:16 -0800] "GET
/documents/gis/maps/downtown-parking-district.pdf HTTP/1.0" 503 323 "-"
"gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:16 -0800] "GET
/cob/Contracts.nsf/0/bb26ca86c82948b188256de40072c62e/$FILE/20030373.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:18 -0800] "GET
/cob/Contracts.nsf/0/c2c6a7f9280c060f88256f0400541797/$FILE/20030402A.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:19 -0800] "GET
/cob/Contracts.nsf/0/58aca7d0527d922388256ae6006ed875/$FILE/1999351L.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:19 -0800] "GET
/pcd/planning/growth/growth-forum/bhm_documents/PF_Infillab-1.pdf HTTP/1.0"
503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:19 -0800] "GET
/fire/safety/extinguishers.htm HTTP/1.0" 503 323 "-" "gsa-crawler
(Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:20 -0800] "GET
/documents/pw/utilities/VMP-Brochure.pdf HTTP/1.0" 503 323 "-" "gsa-crawler
(Enterprise; MID-02119; )"
74.6.72.88 - - [11/Mar/2007:02:23:20 -0800] "GET
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42?OpenView&Grid=5&Date=2594-02-10
 HTTP/1.0" 503 323 "-" "Mozilla/5.0 (compatible; Yahoo! Slurp;
http://help.yahoo.com/help/us/ysearch/slurp)"
10.101.2.29 - - [11/Mar/2007:02:23:21 -0800] "GET
/documents/planning/maps/EIS_Figure_3_4_1_1_Watersheds.pdf HTTP/1.0" 503
323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:20 -0800] "GET
/cob/Contracts.nsf/0/6422c956d416cdb788256ec2007a56ff/$FILE/20040337.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:21 -0800] "GET
/cob/Contracts.nsf/0/7fc49fd215ed2c78882568410075c74d/$FILE/19990336.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:21 -0800] "GET
/cob/Contracts.nsf/0/7cdd6631f7487f9088256d26006c6a3c/$FILE/20030167.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:22 -0800] "GET
/pw/environment/water-conservation HTTP/1.0" 503 323 "-" "gsa-crawler
(Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:22 -0800] "GET
/documents/finance/forms/auto-pay-form.pdf HTTP/1.0" 503 323 "-"
"gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:22 -0800] "GET
/web/boa.nsf/0/838e4d4cd813abd5882565be0002899c?OpenDocument HTTP/1.0" 503
323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:24 -0800] "GET
/cob/Contracts.nsf/0/a6213a814db9ca398825718b006a6dc9/$FILE/20050160A.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:23 -0800] "GET
/cob/Contracts.nsf/0/de6e23bf514ecac988256a1500632e04/$FILE/20010063.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:23 -0800] "GET
/cob/Contracts.nsf/frmWeb/D58FCB22A439AA1C88257179004ED876?OpenDocument
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
74.6.72.247 - - [11/Mar/2007:02:23:24 -0800] "GET
/cob/libres.nsf/d3570bd6f8b9801588256c5b005eec42?OpenView&Grid=1&Date=2203-07-08
 HTTP/1.0" 503 323 "-" "Mozilla/5.0 (compatible; Yahoo! Slurp;
http://help.yahoo.com/help/us/ysearch/slurp)"
66.249.65.232 - - [11/Mar/2007:02:23:25 -0800] "GET
/web/bmcode.nsf/pgWebCat?OpenPage&Start=4.25&Count=25&Collapse=5.2
HTTP/1.1" 503 323 "-" "Mozilla/5.0 (compatible; Googlebot/2.1;
+http://www.google.com/bot.html)"
10.101.2.29 - - [11/Mar/2007:02:23:25 -0800] "GET
/cob/Contracts.nsf/0/5a19433e27081fdb88256938006b4aea/$FILE/c2000206.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:26 -0800] "GET
/cob/Contracts.nsf/0/ce359dfccde618a1882565a2005c75d8/$FILE/C1995109.PDF
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:27 -0800] "GET
/pcd/planning/growth/growth-forum/bhm_documents/PF_Feedback.pdf HTTP/1.0"
503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:26 -0800] "GET
/cob/Contracts.nsf/0/4c1350da069a9e4388256eee007bbe10/$FILE/20040397.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:27 -0800] "GET
/pcd/planning/growth/growth-forum/res_lk_main.html HTTP/1.0" 503 323 "-"
"gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:28 -0800] "GET
/cob/Contracts.nsf/0/a983a5377e659a328825688d005e8a9a/$FILE/20000037.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:28 -0800] "GET
/web/civil.nsf/0/d42fc8519fac464488256302006efed0?OpenDocument HTTP/1.0"
503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:27 -0800] "GET
/documents/finance/reports/monthly/2004/2004-08-aug-finrpt.pdf HTTP/1.0"
503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:28 -0800] "GET
/cob/Contracts.nsf/frmWeb/1AB8F9F4A73C3A5B88257279006863F0?OpenDocument
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:29 -0800] "GET
/web/boa.nsf/0/64452a022855b5ad8825672f005f752d?OpenDocument HTTP/1.0" 503
323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:29 -0800] "GET
/cob/Contracts.nsf/0/6133e63a26feddf7882565cb006b1edf/$FILE/C1993004.PDF
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:29 -0800] "GET
/cob/Contracts.nsf/0/f04ad5930e0780ad88256f9e006d7d7d/$FILE/20050042.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:28 -0800] "GET
/cob/Contracts.nsf/0/2c8da76458cacdc188256854007718c3/$FILE/1998141b.pdf
HTTP/1.0" 503 323 "-" "gsa-crawler (Enterprise; MID-02119; )"
10.101.2.29 - - [11/Mar/2007:02:23:29 -0800] "GET
/documents/gis/maps/transportation/2005-tif.pdf HTTP/1.0" 503 323 "-"
"gsa-crawler (Enterprise; MID-02119; )"


Research

I've tried "tuning" the apache config without much success.  And I've
searched the Internet for similar issues.  The closest one I could find is
this:

http://issues.apache.org/bugzilla/show_bug.cgi?id=37770

However, it's not clear what fix might work.  One of the main backend web
app servers is IBM HTTP driven and not IIS so some of the fixes in the
above bug report may not apply.

Also ran aross this listing of posts, but we have the Microsoft patch
applied to the server that is mentioned in them:
http://www.apachelounge.com/forum/viewtopic.php?t=160&sid=05916f5f8b8eaeaa4cf90c26fddbc683


I thought at one time I saw a correlation with our Google search appliance
crawling schedule and the errors, but we have it schedule to start at 2am
every morning and we don't consistently see the issue every morning in the
logs.  I also thought I saw a correlation with other search engines hitting
the web server too, but not sure.

Any assistance would be greatly appreciated.

Thanks.
____________________________
Steven


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