(20014)Internal error: proxy: error reading status line from remote server (Apache Users)

Hi List,

I'm using Apache 2.2.11 on CentOS, arch - x86 as write-through subversion proxy.

Server version: Apache/2.2.11 (Unix)
Server built: Apr 10 2010 16:04:54

I have started getting the following error for last few days, which I really find strange :

(20014)Internal error: proxy: error reading status line from remote server myhostname.mydomain.com:80

I found some information by googling and I found this thread :

http://serverfault.com/questions/206738/intermittent-error-when-using-mod-proxy-to-do-reverse- proxy-to-soap-service . As per this thread I added the following in the httpd.conf of write-throuh proxy :

SetEnv force-proxy-request-1.0 1
SetEnv proxy-nokeepalive 1

But does not help. Also this thread also refers http://httpd.apache.org/docs/2.2/mod/mod_proxy_http.html and it says :

"proxy-initial-not-pooled

If this variable is set no pooled connection will be reused if the client connection is an initial connection. This avoids the "proxy: error reading status line from remote server" error message caused by the race condition that the backend server closed the pooled connection after the connection check by the proxy and before data sent by the proxy reached the backend. It has to be kept in mind that setting this variable downgrades performance, especially with HTTP/1.0 clients."

I tried to set this environment variable in write-through proxy's httpd.conf but also of no help.

I would appreciate any pointers on this.

Thank you!

Regards,

Ravi.