Weblogic Error..."got exception 'READ_ERROR_FROM_SERVER [os error=0, line 853 of ../nsapi/URL.cpp]: Unexpected EOF reading HTTP status - failover request based on Idempotent flag', referer:" error solution :)

Symptoms

Intermitent issue been logged in Apache log file. This happens with different resources from WLS - it happens with HTTP GET/PUT/POST.
"READ_ERROR_FROM_SERVER [os error=0, line 841 of ../nsapi/URL.cpp]: "Unexpected EOF reading HTTP status - failover request based on Idempotent flag"

Complete error message as below :
[Wed Dec 29 10:41:06 2010] [error] [client xxx.xxx.xx] ap_proxy: trying GET /pl at backend host 'xxx.xx.xx.xxx/9010; got exception 'READ_ERROR_FROM_SERVER [os error=0, line 841 of ../nsapi/URL.cpp]: Unexpected EOF reading HTTP status - failover request based on Idempotent flag', referer: http://xxx.xxx/2396879/zahnzusatz_160x600.swf

Weblogic : 10.3.0 - 10.3.3
Apache Verison : 2.2.3-16.29.2

Note : There wont be any exception log in the WLS log file.

Cause

Cause :

Running with old apache plugin.

Solution

Solution :

From the exception its clear that the connection is getting terminated at the backend server unexpectedly but also after a while the connection fails to be established.

Apply the latest apache plugin bundled either with 10.3.4 or 10.3.5.
or
You can also download WLSPlugin1.1-11gR1PS3.zip from http://www.oracle.com/technetwork/middleware/ias/downloads/wls-plugins-096117.html.