httpd-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Hansjoerg Pehofer <hansjoerg.peho...@uibk.ac.at>
Subject Re: httpd-2.1.7 Connection-pooling Problem w/ ReverseProxy, Loadbalancer
Date Mon, 21 Nov 2005 15:25:45 GMT
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

I briefly tried httpd-2.1.10 today and still see this.
(Same httpd.conf, only changed ServerRoot to
"/usr/local/apache2-2.1.10/")

kind regards
Hansjörg

Hansjoerg Pehofer <hansjoerg.pehofer@uibk.ac.at> writes:

> Hi,
>
> I experienced Apache-2.1.7 (/w WorkerMPM on Solaris 9) connecting to the
> wrong backends when having configured more than one balancer cluster. 
> (see httpd.conf below)
> ErrorLog shows some odd entries (marked in the example below) during
> proxy_util.c's ap_proxy_determine_connection().
>
> I could work around this behaviour by changing line 1788 of proxy_util.c
>
> - else if (!conn->hostname) { 
> + else if (!conn->hostname || strcmp(conn->hostname, uri->hostname) != 0) {
>
> This unlikely is a fix, however: I wonder if someone has seen this
> behavior before and whether someone familiar with this modules can hint
> me where to look deeper into this.
>
> kind regards
> Hansjörg
>
> -- Example ErrorLog:
>
>      [Wed Sep 14 14:33:27 2005] [debug] mod_proxy_balancer.c(41): proxy: BALANCER: canonicalising
URL //webapp-cluster/gopublic/content/bidok/library
>      [Wed Sep 14 14:33:27 2005] [debug] mod_proxy_balancer.c(524): proxy: BALANCER (balancer://webapp-cluster)
worker (http://192.168.15.5) rewritten to http://192.168.15.5/gopublic/content/bidok/library?authors=1
>      [Wed Sep 14 14:33:27 2005] [debug] mod_proxy.c(726): Running scheme balancer handler
(attempt 0)
>      [Wed Sep 14 14:33:27 2005] [debug] mod_proxy_http.c(1601): proxy: HTTP: serving
URL http://192.168.15.5/gopublic/content/bidok/library?authors=1
> -->  [Wed Sep 14 14:33:27 2005] [debug] proxy_util.c(1764): proxy: connecting http://192.168.15.5/gopublic/content/bidok/library?authors=1
to 192.168.15.5:80
> -->  [Wed Sep 14 14:33:27 2005] [debug] proxy_util.c(1860): proxy: connected /gopublic/content/bidok/library?authors=1
to 192.168.15.3:80
> -->  [Wed Sep 14 14:33:27 2005] [debug] proxy_util.c(1952): proxy: HTTP: fam 2 socket
created to connect to 192.168.15.5
> -->  [Wed Sep 14 14:33:27 2005] [debug] proxy_util.c(2045): proxy: HTTP: connection
complete to 192.168.15.3:80 (192.168.15.3)
>      [Wed Sep 14 14:33:27 2005] [debug] mod_proxy_http.c(1383): proxy: start body send
>      [Wed Sep 14 14:33:27 2005] [debug] mod_headers.c(612): headers: ap_headers_output_filter()
>      [Wed Sep 14 14:33:27 2005] [debug] mod_proxy_http.c(1470): proxy: end body send
>      [Wed Sep 14 14:33:27 2005] [debug] proxy_util.c(1722): proxy: HTTP: has released
connection for (192.168.15.3)
>      [Wed Sep 14 14:33:27 2005] [debug] mod_proxy_balancer.c(552): proxy_balancer_post_request
for (balancer://webapp-cluster)
>
> -- Example httpd.conf:
>
> ServerRoot "/usr/local/apache2-2.1.7/"
> TimeOut 300
> KeepAlive On
> MaxKeepAliveRequests 100
> KeepAliveTimeout 15
>     StartServers         2
>     MaxClients          50
>     MinSpareThreads     25
>     MaxSpareThreads     50
>     ThreadsPerChild     25
>
> Listen 80
> User nobody
> Group nobody
>
> LoadModule proxy_module modules/mod_proxy.so
> LoadModule proxy_http_module modules/mod_proxy_http.so
> LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
> LoadModule rewrite_module modules/mod_rewrite.so
>
> DocumentRoot "/www"
>
> ProxyRequests Off
> ProxyVia Off
> EnableMMAP off
>
> ErrorLog logs/error_log
> LogLevel debug
> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined

> CustomLog logs/access_log combined  env=!nolog
>
> <Location /balancer-manager>
>     SetHandler balancer-manager
>
>     Order Deny,Allow
>     Deny from all
>     Allow from 192.168.15
> </Location>
>
> NameVirtualHost *:80
> <VirtualHost *:80>
>
>     ServerName bidok.uibk.ac.at
>     ProxyPreserveHost On
>
>     <Proxy balancer://webapp-cluster>
>          BalancerMember http://192.168.15.5
>          #BalancerMember http://192.168.15.6
>     </Proxy>
>
>     <Proxy balancer://axkit-cluster>
>          BalancerMember http://192.168.15.2 loadfactor=100
>          BalancerMember http://192.168.15.3 loadfactor=50
>     </Proxy>
>
>     RewriteEngine On
>     RewriteRule ^/library/q(.*)$      balancer://webapp-cluster/gopublic/content/bidok/library$1
 [P,L]
>     ProxyPassReverse /library/q       balancer://webapp-cluster/gopublic/content/bidok/library
>     RewriteRule ^/ximsroot/?(.*)$     balancer://webapp-cluster/ximsroot/$1         
             [P,L]
>     ProxyPassReverse  /ximsroot/      balancer://webapp-cluster/ximsroot/
>     RewriteRule ^/?(.*)$              balancer://axkit-cluster/$1                   
             [P,L]
>     ProxyPassReverse  /               balancer://axkit-cluster/
> </VirtualHost>
>
> -- 
> IT Services                University of Innsbruck    
> CFB4 D6E7 33F4 34C0 18B9  6661 E355 4337 3F8B D9C2
>  http://purl.org/net/hansjoerg.pehofer/public_key

- -- 
IT Services                University of Innsbruck    
CFB4 D6E7 33F4 34C0 18B9  6661 E355 4337 3F8B D9C2
 http://purl.org/net/hansjoerg.pehofer/public_key
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFDgecC41VDNz+L2cIRAv0CAJ9zvxnjPc3m+HAXdc4bekkybot/nQCgiFIw
USti/+rXeppNK5QjyfqU2B8=
=Am2K
-----END PGP SIGNATURE-----

Mime
View raw message