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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 37770] - proxy: error reading status line from remote server (null)
Date Mon, 10 Sep 2007 22:12:09 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=37770





------- Additional Comments From gamble_nut@yahoo.com  2007-09-10 15:12 -------
I have compiled the latest httpd 2.2.6 with static modules i.e. 

./configure --prefix=/usr/local/apache --enable-modules="asis alias cache 
deflate disk_cache expires file_cache mem_cache headers mime mimemagic include 
log_config proxy proxy_http rewrite setenvif status vhost_alias" --with-
mpm=worker

We have IIS 6.0 as backend webservers and a BigIP F5 for load balancing in 
front of them. The Apache sits in a different geographical location and 
connects to the IIS webservers thru a VPN connection. The virtual host config 
is as follows:

<VirtualHost xx.xx.xx.xx>
        ServerName www.abc.com
        ServerAlias abc.com


        ProxyRequests Off
        ProxyBadHeader Ignore
        SetEnv force-proxy-request-1.0 1
        SetEnv proxy-nokeepalive 1


        ProxyPass / http://www.abc.com/  smax=5 max=20 ttl=120 retry=1 
keepalive=Off
        #ProxyPass / http://www.abc.com/
        ProxyPassReverse / http://www.abc.com/
</VirtualHost>

[Mon Sep 10 17:36:59 2007] [error] ap_proxy_connect_backend disabling worker 
for (www.ABC.com)
[Mon Sep 10 17:36:59 2007] [error] (110)Connection timed out: proxy: HTTP: 
attempt to connect to xx.xx.xx.xx:80 (www.ABC.com) failed
[Mon Sep 10 17:37:00 2007] [error] (110)Connection timed out: proxy: HTTP: 
attempt to connect to xx.xx.xx.xx:80 (www.ABC.com) failed
[Mon Sep 10 17:37:00 2007] [error] ap_proxy_connect_backend disabling worker 
for (www.ABC.com)
[Mon Sep 10 17:37:00 2007] [error] (110)Connection timed out: proxy: HTTP: 
attempt to connect to xx.xx.xx.xx:80 (www.ABC.com) failed
[Mon Sep 10 17:37:01 2007] [error] (110)Connection timed out: proxy: HTTP: 
attempt to connect to xx.xx.xx.xx:80 (www.ABC.com) failed
[Mon Sep 10 17:37:01 2007] [error] ap_proxy_connect_backend disabling worker 
for (www.ABC.com)
[Mon Sep 10 17:38:21 2007] [error] [client 200.124.142.132] (70007)The timeout 
specified has expired: proxy: error reading status line from remote server 
www.ABC.com, referer: http://www.ABC.com/
[Mon Sep 10 17:38:21 2007] [error] [client 200.124.142.132] proxy: Error 
reading from remote server returned by /welcome/welcome.aspx, referer: 
http://www.ABC.com/

These errors are appearing randomly and I was monitoring a ping between Apache 
to the F5 and there were no hiccups in the VPN connection. The problem gets 
exaggerated when I use multiple Apache's in front and load balance between 
them.

Please let me know if there is any fix available to the problem or If I should 
not be using Apache to reverse proxy a website being loadbalanced by F5.

Thanks in anticipation:

AS



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