I checked our httpd.conf and we do have reqtimeout_module already loaded, 
however there is nothing set.  According to the Apache 2.4 documentation the 
default values are:

Default: header=20-40,MinRate=500 body=20,MinRate=500

Wouldn't you think that should be high enough ?  I know for a fact that the 
data is not taking 20-40 seconds to post in these applications, as the users 
are not waiting that long.  They are only seeing slowdowns of a few seconds 
between pages (which in network time is pretty long, ecspecially accessing the 
applications locally and not coming in from over the internet.)


-----Original Message-----
From: Mike Rumph [mailto:mike.ru...@oracle.com] 
Sent: Monday, June 20, 2016 10:45 AM
To: users@httpd.apache.org
Subject: Re: [users@httpd] Issues migrating Weblogic proxies from Sun One 6.1 
to Apache 2.4

Hello Joe,

I am not in a position to offer an official Oracle statement for your situation.
But I do work closely with the owners of the WLS plug-ins.

Here is an initial evaluation from one of the developers:

"WRITE_ERROR_TO_CLIENT is typically seen when there is an error writing the 
response to the client (WLS plug-in client). This usually occurs when the user 
sends a request, but closes the browser (or hits a stop
button) before the response is received by the client. In such a scenario, from 
the plug-in perspective, whenever response is received from WLS, it cannot 
relay it to the client as the connection is broken, and it logs 
WRITE_ERROR_TO_CLIENT error. This is usually a harmless error. If the above is 
not true (closing the browser etc), then it may be possible that the client 
timeout is too low (or lower than the WLS response time for the request). In 
such cases, the timeout needs to be increased. I am not aware of what 
parameters to look out for here, but mod_reqtimeout may be a good beginning."

I hope that this is helpful to you.
For more specific details, you would still need to contact official Oracle 
support channels.

Thanks,

Mike

On 6/17/2016 7:30 AM, Joe Muller wrote:
> I am working on a project to migrate all our IPlanet 6.1 SP19 webserver 
> proxies (formerly Sun One) to Apache 2.4, since IPlanet 6.1 does not support 
> TLS 1.2 and IPlanet 7.0 is being EOL. Our backend application servers are 
> Weblogic 9.2 / Weblogic 12c. The IPlanet proxies have performed FLAWLESSLY 
> for over 10 years, despite the product being no longer supported and their WL 
> Plug-in not officially supported with Weblogic 12c.
>
>   However now that we are trying to use a more supported configuration 
> (self-compiled Apache 2.4.18 running Weblogic Server Plugin 12.1.3) we are 
> constantly seeing these errors, which results in performance degradation for 
> our applications, and in some cases I think maybe even lost data.
>
>
>   [Tue Jun 14 09:27:36.239682 2016] [weblogic:error] [pid 12513:tid 
> 140185150932736] [client 10.165.254.1:28171] <1251314659108487> Write 
> to the client failed: calling URL::close at line 559 of BaseProxy.cpp, 
> referer: https://intgalf.xyz.com/ALFA/selectFileType.do?fileType=O1MM
>
>   [Tue Jun 14 09:27:36.239747 2016] [weblogic:error] [pid 12513:tid 
> 140185150932736] [client 10.165.254.1:28171] <1251314659108487> **
>   *****Exception type [WRITE_ERROR_TO_CLIENT] raised at line 560 of 
> BaseProxy.cpp, referer: 
> https://intgalf.xyz.com/ALFA/selectFileType.do?fileType=O1MM
>
>   [Tue Jun 14 09:27:36.239952 2016] [weblogic:error] [pid 12513:tid 
> 140185150932736] [client 10.165.254.1:28171] <1251314659108487> 
> request 
> [/ALFA/servlet/DecryptDownload?linkName=al_o1mm_carr20150630.csv] did 
> NOT process successfully.................., 
> referer:https://intgalf.xyz.com/ALFA/selectFileType.do?fileType=O1MM
>
>
>
>   Our topology is like this:
>
>   Client Browser <--> Firewall <--> Load Balancer <--> Web Proxies 
> <--> Firewall <--> Weblogic Application Servers
>
>   Oracle support suggested as work around that we increase WLSocketsTimeOut 
> in the plug-in, but I think that only masks the issue, as we still the errors.
>
>   We did a network trace and it looks like the Apache plug-in is pre-maturely 
> closing the connection to the WL server, but I can't be certain. We know that 
> our firewall is not responsible.
>
>   Any ideas ? I thought Apache would work better then Sun One, but this has 
> been the opposite. Is there some fundamental webserver tunable parameter that 
> is so different between out of the box Sun One and out of the box Apache that 
> could be causing this ?
>
>
>
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