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Posted to users@httpd.apache.org by Michael Hulet <mi...@mindtheshark.com> on 2006/11/23 14:02:17 UTC

[users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Hello all,

I'm upgrading from Apache 2.0.54 to Apache 2.2.3, as I would like to try the proxy_balancer module.

I'm running a Debian Sarge box. I uninstalled Apache 2.0.54 and I compiled and installed Apache 2.2.3 in /etc/apache2:

    # wget http://apache.scarlet.be/httpd/httpd-2.2.3.tar.gz
    # tar -xvzf httpd-2.2.3.tar.gz
    # cd httpd-2.2.3
    # ./configure --prefix=/etc/apache2 --enable-mods-shared=all --enable-deflate --enable-proxy --enable-proxy-balancer --enable-proxy-http
    # make
    # make install|

Then, I added this line to /etc/apache2/httpd.conf:

    LoadModule proxy_balancer_module modules/mod_proxy_balancer.so

I launched te server and here is my problem:

    # apache2ctl -k start
    Syntax error on line 8 of /etc/apache2/httpd.conf:
    *Cannot load /etc/apache2/modules/mod_proxy_balancer.so into server:
    /etc/apache2/modules/mod_proxy_balancer.so: undefined symbol:
    proxy_hook_post_request*

My searches on Google gives me no explaination.
Is there someone here who knows what I could do?

Have a nice day,

Michael

Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Joshua Slive <jo...@slive.ca>.
On 11/23/06, Michael Hulet <mi...@mindtheshark.com> wrote:

>
> Isn't it "dangerous" to remove base-config and initrd-tools packages?

I have no idea.  Sounds like a question better targeted at a Debian users list.

Joshua.

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Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Michael Hulet <mi...@mindtheshark.com>.
Joshua Slive a écrit :
> On 11/23/06, Michael Hulet <mi...@mindtheshark.com> wrote:
>
>> > But what really concerns me here is that you said you were downloading
>> > and compiling directly from apache.org, yet you are using apache2ctl,
>> > which I believe is debian-specific.  This could be causing any number
>> > of problems, and could also imply that you have some weird mix of
>> > debian and apache-installed components.
>> >
>> > Joshua.
>> You're right:
>>
>>     # apache2ctl -v
>>     Server version: Apache/2.0.54
>>     Server built:   Jul 28 2006 09:04:55
>>
>> So I wanted to remove apache2-utils but it wants to remove a lot of
>> dependencies that I don't want to remove (phpMyAdmin, Webmin, php, ...).
>> What do you think I should do first?
>
> I'd say you have two choices:
>
> 1. Grab the debian-packaged version of 2.2.  I'm sure it exists
> someplace; or
>
> 2. Install the apache.org package someplace separate from the debian
> install (/usr/local/apache2 for example) and be sure to use the tools
> that get installed under there.)  But I think you're going to find
> that you'll need to recompile php, etc anyway if you go to 2.2.
>
> Joshua.
I added a line in my sources.list file to check for Debian testing
packages. Now I can do this:

    # apt-get install apache2
    (...)
    The following extra packages will be installed:
      apache2-mpm-worker apache2.2-common libapr1 libaprutil1 libc6
    libc6-dev libdb4.4 libkrb53 libpq4 libsqlite3-0 libssl0.9.8 locales
      lsb-base tzdata
    Suggested packages:
      glibc-doc manpages-dev krb5-doc krb5-user
    The following packages will be REMOVED:
      apache2-common apache2-mpm-prefork *base-config* *initrd-tools*
    libapache2-mod-fastcgi libapache2-mod-php5 php5-mysql
    The following NEW packages will be installed:
      apache2 apache2-mpm-worker apache2.2-common libapr1 libaprutil1
    libdb4.4 libpq4 libsqlite3-0 libssl0.9.8 lsb-base tzdata
    The following packages will be upgraded:
      libc6 libc6-dev libkrb53 locales
    4 upgraded, 11 newly installed, 7 to remove and 321 not upgraded.
    (...)

Isn't it "dangerous" to remove base-config and initrd-tools packages?

Michael

Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Joshua Slive <jo...@slive.ca>.
On 11/23/06, Michael Hulet <mi...@mindtheshark.com> wrote:

> > But what really concerns me here is that you said you were downloading
> > and compiling directly from apache.org, yet you are using apache2ctl,
> > which I believe is debian-specific.  This could be causing any number
> > of problems, and could also imply that you have some weird mix of
> > debian and apache-installed components.
> >
> > Joshua.
> You're right:
>
>     # apache2ctl -v
>     Server version: Apache/2.0.54
>     Server built:   Jul 28 2006 09:04:55
>
> So I wanted to remove apache2-utils but it wants to remove a lot of
> dependencies that I don't want to remove (phpMyAdmin, Webmin, php, ...).
> What do you think I should do first?

I'd say you have two choices:

1. Grab the debian-packaged version of 2.2.  I'm sure it exists someplace; or

2. Install the apache.org package someplace separate from the debian
install (/usr/local/apache2 for example) and be sure to use the tools
that get installed under there.)  But I think you're going to find
that you'll need to recompile php, etc anyway if you go to 2.2.

Joshua.

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Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Nick Kew <ni...@webthing.com>.
On Thu, 23 Nov 2006 16:05:33 +0100
Michael Hulet <mi...@mindtheshark.com> wrote:


> So I wanted to remove apache2-utils but it wants to remove a lot of
> dependencies that I don't want to remove (phpMyAdmin, Webmin,
> php, ...). What do you think I should do first?

Does Debian's documentation not help with that?

Ask a Debian support forum.  To arm yourself for that, you might like
to read
http://www.regdeveloper.co.uk/2006/11/04/apache_packages_support_vacuum/

-- 
Nick Kew

Application Development with Apache - the Apache Modules Book
http://www.apachetutor.org/

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Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Michael Hulet <mi...@mindtheshark.com>.
Joshua Slive a écrit :
> On 11/23/06, Michael Hulet <mi...@mindtheshark.com> wrote:
>
>> Thanks for the tip, Joshua. So here is my new httpd.conf:
>>
>>     LoadModule proxy_module modules/mod_proxy.so
>>     LoadModule proxy_http_module modules/mod_proxy_http.so
>>     LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
>>
>> The result is not so nicer:
>>
>>     # apache2ctl -k start
>>     [Thu Nov 23 15:24:18 2006] [warn] module proxy_module is already
>>     loaded, skipping
>>     [Thu Nov 23 15:24:18 2006] [warn] module proxy_http_module is
>>     already loaded, skipping
>>     Syntax error on line 9 of /etc/apache2/httpd.conf:
>>     Cannot load /etc/apache2/modules/mod_proxy_balancer.so into server:
>>     /etc/apache2/modules/mod_proxy_balancer.so: undefined symbol:
>>     proxy_hook_post_request
>>
>> I really don't know what else I could do...
>
> That means you already had those loadmodule lines elsewhere in your
> config.
>
> But what really concerns me here is that you said you were downloading
> and compiling directly from apache.org, yet you are using apache2ctl,
> which I believe is debian-specific.  This could be causing any number
> of problems, and could also imply that you have some weird mix of
> debian and apache-installed components.
>
> Joshua.
You're right:

    # apache2ctl -v
    Server version: Apache/2.0.54
    Server built:   Jul 28 2006 09:04:55

So I wanted to remove apache2-utils but it wants to remove a lot of
dependencies that I don't want to remove (phpMyAdmin, Webmin, php, ...).
What do you think I should do first?

Michael

Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Joshua Slive <jo...@slive.ca>.
On 11/23/06, Michael Hulet <mi...@mindtheshark.com> wrote:

> Thanks for the tip, Joshua. So here is my new httpd.conf:
>
>     LoadModule proxy_module modules/mod_proxy.so
>     LoadModule proxy_http_module modules/mod_proxy_http.so
>     LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
>
> The result is not so nicer:
>
>     # apache2ctl -k start
>     [Thu Nov 23 15:24:18 2006] [warn] module proxy_module is already
>     loaded, skipping
>     [Thu Nov 23 15:24:18 2006] [warn] module proxy_http_module is
>     already loaded, skipping
>     Syntax error on line 9 of /etc/apache2/httpd.conf:
>     Cannot load /etc/apache2/modules/mod_proxy_balancer.so into server:
>     /etc/apache2/modules/mod_proxy_balancer.so: undefined symbol:
>     proxy_hook_post_request
>
> I really don't know what else I could do...

That means you already had those loadmodule lines elsewhere in your config.

But what really concerns me here is that you said you were downloading
and compiling directly from apache.org, yet you are using apache2ctl,
which I believe is debian-specific.  This could be causing any number
of problems, and could also imply that you have some weird mix of
debian and apache-installed components.

Joshua.

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Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Michael Hulet <mi...@mindtheshark.com>.
Joshua Slive a écrit :
> On 11/23/06, Michael Hulet <mi...@mindtheshark.com> wrote:
>> Hello all,
>>
>> I'm upgrading from Apache 2.0.54 to Apache 2.2.3, as I would like to
>> try the proxy_balancer module.
>>
>> I'm running a Debian Sarge box. I uninstalled Apache 2.0.54 and I
>> compiled and installed Apache 2.2.3 in /etc/apache2:
>>
>>     # wget http://apache.scarlet.be/httpd/httpd-2.2.3.tar.gz
>>     # tar -xvzf httpd-2.2.3.tar.gz
>>     # cd httpd-2.2.3
>>     # ./configure --prefix=/etc/apache2 --enable-mods-shared=all
>> --enable-deflate --enable-proxy --enable-proxy-balancer
>> --enable-proxy-http
>>     # make
>>     # make install|
>>
>> Then, I added this line to /etc/apache2/httpd.conf:
>>
>>     LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
>>
>> I launched te server and here is my problem:
>>
>>     # apache2ctl -k start
>>     Syntax error on line 8 of /etc/apache2/httpd.conf:
>>     *Cannot load /etc/apache2/modules/mod_proxy_balancer.so into server:
>>     /etc/apache2/modules/mod_proxy_balancer.so: undefined symbol:
>>     proxy_hook_post_request*
>
> You'll also need LoadModule lines for mod_proxy and mod_proxy_http.
>
> Joshua.
Thanks for the tip, Joshua. So here is my new httpd.conf:

    LoadModule proxy_module modules/mod_proxy.so
    LoadModule proxy_http_module modules/mod_proxy_http.so
    LoadModule proxy_balancer_module modules/mod_proxy_balancer.so

The result is not so nicer:

    # apache2ctl -k start
    [Thu Nov 23 15:24:18 2006] [warn] module proxy_module is already
    loaded, skipping
    [Thu Nov 23 15:24:18 2006] [warn] module proxy_http_module is
    already loaded, skipping
    Syntax error on line 9 of /etc/apache2/httpd.conf:
    Cannot load /etc/apache2/modules/mod_proxy_balancer.so into server:
    /etc/apache2/modules/mod_proxy_balancer.so: undefined symbol:
    proxy_hook_post_request

I really don't know what else I could do...

Re: [users@httpd] Apache2.2 cannot start: "undefined symbol: proxy_hook_post_request" error (in file /etc/apache2/modules/mod_proxy_balancer.so)

Posted by Joshua Slive <jo...@slive.ca>.
On 11/23/06, Michael Hulet <mi...@mindtheshark.com> wrote:
> Hello all,
>
> I'm upgrading from Apache 2.0.54 to Apache 2.2.3, as I would like to try the proxy_balancer module.
>
> I'm running a Debian Sarge box. I uninstalled Apache 2.0.54 and I compiled and installed Apache 2.2.3 in /etc/apache2:
>
>     # wget http://apache.scarlet.be/httpd/httpd-2.2.3.tar.gz
>     # tar -xvzf httpd-2.2.3.tar.gz
>     # cd httpd-2.2.3
>     # ./configure --prefix=/etc/apache2 --enable-mods-shared=all --enable-deflate --enable-proxy --enable-proxy-balancer --enable-proxy-http
>     # make
>     # make install|
>
> Then, I added this line to /etc/apache2/httpd.conf:
>
>     LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
>
> I launched te server and here is my problem:
>
>     # apache2ctl -k start
>     Syntax error on line 8 of /etc/apache2/httpd.conf:
>     *Cannot load /etc/apache2/modules/mod_proxy_balancer.so into server:
>     /etc/apache2/modules/mod_proxy_balancer.so: undefined symbol:
>     proxy_hook_post_request*

You'll also need LoadModule lines for mod_proxy and mod_proxy_http.

Joshua.

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