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From Joe Muller <>
Subject [users@httpd] Issue with proxy to IIS
Date Thu, 30 Mar 2017 19:33:59 GMT
We are running Apache 2.4.18 with mod_proxy and recently moved a backend site from a Weblogic
server to an IIS server, and now we are facing intermittent issues when users connect.  Users
tend to receive the error:

Proxy Error
The proxy server received an invalid response from an upstream server.
The server could not handle the request GET/.
Reason: Error reading from remote server.

The logs usually look something like this:

[Wed Mar 29 14:10:42.893220 2017] [proxy:error] [pid 26435:tid 139648193414912] [client]
AH00898: Error reading from remote server returned by /

or this:

[Wed Mar 29 14:14:17.085777 2017] [proxy_http:error] [pid 26519:tid 139648184960768] (104)Connection
reset by peer: [client] AH01102: error reading status line from remote server, referer:

Below is the current config (IP addresses have been changed to protect the innocent.)   We
have tried several different options but had no luck.  Anybody else ever experience this ?
 We would appreciate any and all help on the matter.  We do not see any errors on the backend
IIS server when this occurs.  I have yet to do a network trace between the systems.


<VirtualHost a.b.c.d:80>
SSLEngine off
TransferLog "logs/www_externaldomain_access_log"
ErrorLog "logs/www_externaldomain_error_log"

<Location />
  SetEnv force-proxy-request-1.0 1
  SetEnv proxy-nokeepalive 1
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