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From "Richters, Eriks (US - Arlington)" <>
Subject RE: [users@httpd] Apache Hangs when proxying Java Requests with WebLogic Plugin
Date Wed, 20 Jun 2012 15:22:22 GMT
Just to follow up on this question, the hanging was resolved by updating the WebLogic Proxy
plugin from 1.0 to 1.1.  However, the new plugin introduced other issues such as read-only
screens in one application, and a re-authentication prompt issue with another application.
   We're still working on those.
Thanks for the help!

From: Kevin Castellow []
Sent: Tuesday, May 15, 2012 9:59 PM
Subject: Re: [users@httpd] Apache Hangs when proxying Java Requests with WebLogic Plugin

Sounds like it has to be configuration problem if other proxies work with same code.  Try
testing a working proxy pointing to this Weblogic server.   It is possible the problem is
on the Weblogic side.
Try to copy the configuration from a working server to this server.  Here are all parameters
for further debugging:

On Tue, May 15, 2012 at 1:56 PM, Richters, Eriks (US - Arlington) <<>>
We had the plugin configured for Debug ALL, as you suggested. Still no sign of an error. 
  Apache just stops responding to all requests.
We've also tried to reproduce this issue by pointing the same proxy to different WebLogic
clusters.  Two other cluster's don't exhibit this behavior.  It's tied to just the one.  We're
currently combing through configurations to check for differences.  At a high level, it's
the same versions of Windows, WebLogic, and Java.
Local content in Apache never causes the hang. As does content in the other apps that are
being proxied.
Thanks for the help!

From: Kevin Castellow [<>]
Sent: Monday, May 14, 2012 10:22 PM
Subject: Re: [users@httpd] Apache Hangs when proxying Java Requests with WebLogic Plugin

The weblogic plugin also has option to debug.  Have you verified the plugin does not show
the error?
Add Debug ALL and by default it should log to /tmp directory.
Are you able to serve content in other directories that may have content locally stored on
Apache and that do not trigger plugin?

On Mon, May 14, 2012 at 4:05 PM, Richters, Eriks (US - Arlington) <<>>
Hello Everyone,
I've run into a problem where Apache Hangs after several requests when proxying some Java
based dashboards.  Pretty consistently, the dashboard loads fine the first four or five times,
on the next time Apache is hung.    It just stops responding to all requests, including the
standard Apache status page.   Apache never seems to come back on its own. Only when it's
The problem only happens with these java-based dashboards.   It doesn't hang on other content
even going out to hundreds of requests.
Apache's logs don't show an error, basically it just stops responding.  It would seem like
it stopped getting requests.    I'd love to have an error to search on.
CPU, Memory, IO all seem to be normal like it's not doing anything.
We're running Apache 2.2.21 on Windows Server 2003, with the WebLogic Proxy Plugin.   The
backend server is  WebLogic 10.3.3, with Java 1.6.30.
SSL is configured between  WebLogic and Apache, but we're not seeing SSL errors.
Does anyone have any suggestions or comments to help resolve this error?
Thank You!

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