Cannot load mod_proxy. undefined symbol: proxy_lb_workers

Nate Hausrath · *nix forums beginner Joined: 06 Jul 2006 Posts: 3

Hi,

I have had Apache 2.2.2 chrooted and running fine for a few weeks now.
Today, I compiled mod_proxy and mod_proxy_http with apxs and copied them to
my jail modules directory. I then added the modules to
httpd.conf(LoadModule proxy_module modules/mod_proxy.so, etc). Upon
trying to stop
the currently running server with apachectl, I received the following error:

httpd: Syntax error on line 82 of /usr/local/apache2/conf/httpd.conf: Cannot
load /usr/local/apache2/modules/mod_proxy.so into server:
/usr/local/apache2/modules/mod_proxy.so: undefined symbol: proxy_lb_workers

Line 82 is what I listed above: LoadModule proxy_module modules/mod_proxy.so

Have I missed some dependency within my jail? Is this something easy that
I've simply overlooked? Googling wasn't very helpful, so I turned this
way. Thanks in advance.

-Nate

Ellison , John P · *nix forums beginner Joined: 23 Jun 2006 Posts: 7

" I then added the modules to httpd.conf (LoadModule proxy_module modules/mod_proxy.so, etc). Upon trying to stop the currently running server with apachectl, I received the following error:

httpd: Syntax error on line 82 of /usr/local/apache2/conf/httpd.conf: Cannot load /usr/local/apache2/modules/mod_proxy.so into server: /usr/local/apache2/modules/mod_proxy.so: undefined symbol: proxy_lb_workers

Line 82 is what I listed above: LoadModule proxy_module modules/mod_proxy.so

Have I missed some dependency within my jail? Is this something easy that I've simply overlooked? Googling wasn't very helpful, so I turned this way. Thanks in advance.

-Nate
"

Hi. I think I ran across the solution to your problem the other day. http://www.apacheweek.com/features/reverseproxies. Skip down to the part where he states "noting that mod_proxy itself is in two source files
(mod_proxy.c and proxy_util.c).
"
I ran across a similar problem to yours and solved it by building mod_proxy using configure. Try using apxs to build proxy_util as well. If you dig around, I think you'll find the proxy_lb_workers, etc. functions in there.

JP

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Nate Hausrath · *nix forums beginner Joined: 06 Jul 2006 Posts: 3

Thanks for your help.

I used apxs to build proxy_util and then tried again. This time I received
a similar message:

httpd: Syntax error on line 82 of /usr/local/apache2/conf/httpd.conf: Cannot
load /usr/local/apache2/modules/proxy_util.so into server:
/usr/local/apache2/modules/proxy_util.so: undefined symbol:
ap_proxy_ssl_enable

Where is ap_proxy_ssl_enable located?

If it's easier, I would like to try to build mod_proxy with configure, but
I'm not really sure how to go about doing that. I've only ever built
modules with apxs. How do I go about doing this?

Thanks,
Nate

On 7/7/06, Ellison , John P <jp@tulane.edu> wrote:

muralive · *nix forums beginner Joined: 13 Mar 2008 Posts: 1

/usr/local/apache/bin/apxs -c mod_proxy.c proxy_util.c

Change the apache location as appropriate.

Google