httpd-bugs mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From bugzi...@apache.org
Subject DO NOT REPLY [Bug 46316] New: Proxied SSI ProxyTimeout render failure
Date Mon, 01 Dec 2008 11:52:32 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=46316

           Summary: Proxied SSI ProxyTimeout render failure
           Product: Apache httpd-2
           Version: 2.2.10
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: major
          Priority: P2
         Component: mod_proxy
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: jem.rayfield@bbc.co.uk


Hi,

It seems that the mod_proxy ProxyTimeout has a nasty side effect when it 
kicks in when used with proxied SSI. Everything after a proxied (and timed out)
SSI is ignored and not rendered.

For example the following simple shtml -> 

<html> 
  <body> 
     <h1>SSI CGI via a proxy test</h1> 
     <!--#include virtual="test-include.html" --> 
     <!--#include virtual="proxy/cgi-bin/perl-sleep.cgi?${QUERY_STRING}" --> 
    <h1> 
      Content that must be displayed even after a proxy timeout 
    </h1> 
  </body> 
</html> 

Has render problems with the CGI is timedout via ProxyTimeOut.
It appear to interrupt the subsequent output filter on timeout? 

The proxy configuration is as follows -->
Apache 2.2.10 (SHTML+mod_proxy+SSI):80 --> Squid:3128 --> Apache
2.2.10(mod_cgi):8080 

   <Proxy balancer://squidbalancer> 
      BalancerMember http://localhost:3128/ 
      ProxySet lbmethod=bytraffic 
      ProxySet timeout=1 
    </Proxy> 
    ProxyTimeout 2 
    RewriteEngine On 
    RewriteRule ^/proxy/(.*) balancer://squidbalancer/$1 [P,QSA,L] 

If the ProxyTimeout kicks in before Squid+Apache/CGI returns the 
following is rendered: 

<html> 
 <body> 
 <h1>SSI CGI via a proxy test</h1> 
 <br/> 
             **MISSING HTML HERE** 

However when I increase the ProxyTimeout in order that Squid times 
out and not the calling Apache before the CGI returns the render looks a 
tad better. 

At least the full shtml is rendered. (Plus some horrid squid 
response). Please see below.

I need proxied server side includes where a ProxyTimeout ensures that the
backend server does not consume and hold up all the requests/threads.


Please do let me have your thoughts 
Cheers
Jem


<html> 
 <body> 
 <h1>SSI CGI via a proxy test</h1> 
 <br/> 
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd"> 
 <HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; 
charset=iso-8859-1"> 
 <TITLE>ERROR: The requested URL could not be retrieved</TITLE> 
 <STYLE type="text/css"><!--BODY{background-color:#ffffff;font- 
family:verdana,sans-serif}PRE{font-family:sans-serif}--></STYLE> 
 </HEAD><BODY> 
 <H1>ERROR</H1> 
 <H2>The requested URL could not be retrieved</H2> 
 <HR noshade size="1px"> 
 <P> 
 While trying to retrieve the URL: 
 <A HREF="http://127.0.0.1//cgi-bin/perl-sleep.cgi?">http:// 
127.0.0.1// 
cgi-bin/perl-sleep.cgi?</A> 
 <P> 
 The following error was encountered: 
 <UL> 
 <LI> 
 <STRONG> 
 Read Timeout 
 </STRONG> 
 </UL> 
 <P> 
 The system returned: 
 <PRE><I> [No Error]</I></PRE> 
 <P> 
 A Timeout occurred while waiting to read data from the network. The 
network 
 or server may be down or congested. Please retry your request. 
 <P>Your cache administrator is <A 
HREF="mailto:webmaster">webmaster</ 
A>. 
 <BR clear="all"> 
 <HR noshade size="1px"> 
 <ADDRESS> 
 Generated Wed, 26 Nov 2008 12:19:09 GMT by PC- 
S043915.national.core.bbc.co.uk (squid/2.6.STABLE17) 
 </ADDRESS> 
 </BODY></HTML> 
 <h1> 
 Content that must be displayed even after a proxy timeout 
 </h1> 
 </body> 
 </html>


-- 
Configure bugmail: https://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org


Mime
View raw message