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From Joe Muller <>
Subject [users@httpd] Issues migrating Weblogic proxies from Sun One 6.1 to Apache 2.4
Date Fri, 17 Jun 2016 14:30:19 GMT

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] <1251314659108487> Write to the client failed: calling URL::close
at line 559 of BaseProxy.cpp, referer:

 [Tue Jun 14 09:27:36.239747 2016] [weblogic:error] [pid 12513:tid 140185150932736] [client] <1251314659108487> ** 
 *****Exception type [WRITE_ERROR_TO_CLIENT] raised at line 560 of BaseProxy.cpp, referer: 

 [Tue Jun 14 09:27:36.239952 2016] [weblogic:error] [pid 12513:tid 140185150932736] [client] <1251314659108487> request [/ALFA/servlet/DecryptDownload?linkName=al_o1mm_carr20150630.csv]
did NOT process successfully.................., referer:

 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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