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From Axel-St├ęphane SMORGRAV <Axel-Stephane.SMORG...@europe.adp.com>
Subject RE: [users@httpd] proxy: error reading status line from remote server
Date Wed, 17 May 2006 16:58:02 GMT
I know that there have been problems with KeepAlive and IE when using https, but not between
Apache and IIS.

Would you by any chance know what the IIS KeepAlive timeout is? Might it possibly be shorter
than the Apache KeepAliveTimeout ? Does this only happen on "long" requests (timeout of the
backend connection)?

When you disable proxy keepalive, the problem will never occur since a new tcp connection
is established for every request.

-ascs


-----Original Message-----
From: Marco Berizzi [mailto:pupilla@hotmail.com] 
Sent: Wednesday, May 17, 2006 3:03 PM
To: users@httpd.apache.org
Subject: [users@httpd] proxy: error reading status line from remote server

Hello everybody.
I'm try to build a reverse proxy for outlook web access
2003sp2 running on windows 2003 sp1.
apache 1.3.35 is running good with this configuration:

<VirtualHost *>
    ServerAdmin postmaster@domain.you
    ServerName mail.domain.you

    ErrorLog /var/log/apache/error_http_owa_log

    ProxyPass /exchange http://mail.domain.you/exchange/
    ProxyPassReverse /exchange/ http://mail.domain.you/exchange/
    ProxyPass /exchweb http://mail.domain.you/exchweb/
    ProxyPassReverse /exchweb http://mail.domain.you/exchweb/
    ProxyPass /public http://mail.domain.you/public/
    ProxyPassReverse /public http://mail.domain.you/public/ </VirtualHost>

The same config with apache 2.2.2 doesn't work. I'm getting these errors:

[Wed May 17 14:36:14 2006] [error] [client 172.16.0.118] proxy: error reading status line
from remote server mail.domain.you, referer: 
http://mail.domain.you/exchange/lmoggi/?Cmd=navbar
[Wed May 17 14:36:14 2006] [error] [client 172.16.0.118] proxy: Error reading from remote
server returned by /exchange/lmoggi/Inbox, referer: 
http://mail.domain.you/exchange/lmoggi/?Cmd=navbar
[Wed May 17 14:36:40 2006] [error] [client 172.16.0.118] proxy: error reading status line
from remote server mail.domain.you [Wed May 17 14:36:40 2006] [error] [client 172.16.0.118]
proxy: Error reading from remote server returned by /exchange/lmoggi/Inbox/R: cucca figo-7.EML
[Wed May 17 14:36:50 2006] [error] [client 172.16.0.118] proxy: error reading status line
from remote server mail.domain.you [Wed May 17 14:36:50 2006] [error] [client 172.16.0.118]
proxy: Error reading from remote server returned by /exchange/lmoggi/Inbox/R: cucca figo-6.EML

the problem is workarounded adding 'SetEnv proxy-nokeepalive 1' to the virtualhost section,
or removing the flag 'Enable HTTP Keep-Alives' in the IIS manager on windows 2003.
Is there any incompatibilities between
windows 2003sp1 and mod_proxy from apache
2.2.2 with keepalive=on?
Why apache 1.3.35 is working fine with
windows 2003sp1 and keealive=on?


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