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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 37145] New: - data loss with httpd-2.0.55 reverse proxy method=post
Date Tue, 18 Oct 2005 13:37:57 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=37145

           Summary: data loss with httpd-2.0.55 reverse proxy method=post
           Product: Apache httpd-2.0
           Version: 2.0.55
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P1
         Component: mod_proxy
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: peter.schlaf@web.de


2 PCs with httpd-2.0.55 running and https enabled (OS SLES9). The first one is
the "real" webserver with all the documents (HTML-pages, etc), the other
webserver is configured as a reverse proxy which gets all the data from the
"real" webserver.

With a browser I can access both webservers and everything seems to be OK.

The problem: 
When I get a form (method="post") through the reverse proxy and send it back,
some of the "post"ed data dont reach the "real" webserver.
It seems to happen always if the total amount of posted data is larger than 8
kbytes.

When I get a form from the "real" webserver directly and send it back there is
no loss of data (at any amount).

The "real" webserver and the reverse proxy are talking via https to each other.
Switching to http does not solve the problem.

When _both_ webservers are switched to http the problem has disappeared, but
this is not really a solution for me.

Downgrading the reverse proxy to httpd-2.0.54 (both webservers with https,
"real" webserver stays with httpd-2.0.55) solved the problem. 

During all tries I left the httpd.conf and ssl.conf unchanged (exception:
ProxyPass and ProxyPassReverse for http/https switching of course)

Reverse proxy configuration:
<IfModule mod_proxy.c>
    SSLProxyEngine       on
    ProxyRequests        off
    ProxyPass            /  https://10.34.56.78/
    ProxyPassReverse     /  https://10.34.56.78/
</IFModule>

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