mod_dav_svn from openCollabNet OS X subversion 1.5.1-2 on OS X 10.5.4 with Apache fails to load

[Russell Hind-2]

Hi, I'm still having trouble using openCollabNet builds of subersion.  
I've got a Mac Mini that came pre-installed with OS X 10.5.2.  I  
updated it to 10.5.4 using the combo updater and set its built-in  
apache to load the default subversion 1.4.4 included with OS X.  This  
has been working fine.

I've since tried to move to the openCollabNet builds so I can start  
hosting 1.5.x repositories.  I installed the package which game me  
the /opt/subversion folder, replaced

LoadModule dav_svn_module libexec/apache2/mod_dav_svn.so

with

LoadModule dav_svn_module /opt/subversion/lib/svn-apache/mod_dav_svn.so

but if I now do an

apachectl -t

I get the following error:

httpd: Syntax error on line 484 of /private/etc/apache2/httpd.conf:  
Syntax error on line 2 of /private/etc/apache2/other/subversion.conf:  
Cannot load /opt/subversion/lib/svn-apache/mod_dav_svn.so into server:  
dlopen(/opt/subversion/lib/svn-apache/mod_dav_svn.so, 10): Symbol not  
found: _svn_atomic__init_once\n  Referenced from: /opt/subversion/lib/
libsvn_fs_base-1.0.dylib\n  Expected in: flat namespace\n

This a clean install of OS X straight from Apple.  Apache works with  
the built-in svn-1.4.4 but not with the package from openCollabNet.  
Is there other configuration required to make this work?

The 1.5.1 binaries (svn, svnadmin etc) all run fine, its just using  
mod_dav_svn that has trouble.

Any help would be greatly appreciated.

Cheers

Russell

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[Jeremy Whitlock]

Russell,
    I responded in the svnbinaries project on openCollabNet.
Basically, I'll look into the cause and fix it.  I've reproduced
locally and I'm working on figuring it out.

Take care,

Jeremy

On Fri, Aug 8, 2008 at 10:59 AM, Russell Hind <rhind@...> wrote:

> Hi, I'm still having trouble using openCollabNet builds of subersion.  I've
> got a Mac Mini that came pre-installed with OS X 10.5.2.  I updated it to
> 10.5.4 using the combo updater and set its built-in apache to load the
> default subversion 1.4.4 included with OS X.  This has been working fine.
>
> I've since tried to move to the openCollabNet builds so I can start hosting
> 1.5.x repositories.  I installed the package which game me the
> /opt/subversion folder, replaced
>
> LoadModule dav_svn_module libexec/apache2/mod_dav_svn.so
>
> with
>
> LoadModule dav_svn_module /opt/subversion/lib/svn-apache/mod_dav_svn.so
>
> but if I now do an
>
> apachectl -t
>
> I get the following error:
>
> httpd: Syntax error on line 484 of /private/etc/apache2/httpd.conf: Syntax
> error on line 2 of /private/etc/apache2/other/subversion.conf: Cannot load
> /opt/subversion/lib/svn-apache/mod_dav_svn.so into server:
> dlopen(/opt/subversion/lib/svn-apache/mod_dav_svn.so, 10): Symbol not found:
> _svn_atomic__init_once\n  Referenced from:
> /opt/subversion/lib/libsvn_fs_base-1.0.dylib\n  Expected in: flat
> namespace\n
>
> This a clean install of OS X straight from Apple.  Apache works with the
> built-in svn-1.4.4 but not with the package from openCollabNet.  Is there
> other configuration required to make this work?
>
> The 1.5.1 binaries (svn, svnadmin etc) all run fine, its just using
> mod_dav_svn that has trouble.
>
> Any help would be greatly appreciated.
>
> Cheers
>
> Russell
>
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>

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[Jeremy Whitlock]

Russell,
    As I look into this, I'm more baffled.  Basically, the 64-bit
support in the binary appears broken somehow.  I'm working on a fix
but until then, you can force Apache to run in 32-bit mode like this:

sudo /usr/bin/arch -arch i386 /usr/sbin/httpd -D FOREGROUND

Using this will load the 32-bit i386 portion of the binary and it will
run as planned.  While this is only an interim workaround, it should
help you continue to use the binary without any problems.

Take care,

Jeremy

On Fri, Aug 8, 2008 at 10:59 AM, Russell Hind <rhind@...> wrote:

> Hi, I'm still having trouble using openCollabNet builds of subersion.  I've
> got a Mac Mini that came pre-installed with OS X 10.5.2.  I updated it to
> 10.5.4 using the combo updater and set its built-in apache to load the
> default subversion 1.4.4 included with OS X.  This has been working fine.
>
> I've since tried to move to the openCollabNet builds so I can start hosting
> 1.5.x repositories.  I installed the package which game me the
> /opt/subversion folder, replaced
>
> LoadModule dav_svn_module libexec/apache2/mod_dav_svn.so
>
> with
>
> LoadModule dav_svn_module /opt/subversion/lib/svn-apache/mod_dav_svn.so
>
> but if I now do an
>
> apachectl -t
>
> I get the following error:
>
> httpd: Syntax error on line 484 of /private/etc/apache2/httpd.conf: Syntax
> error on line 2 of /private/etc/apache2/other/subversion.conf: Cannot load
> /opt/subversion/lib/svn-apache/mod_dav_svn.so into server:
> dlopen(/opt/subversion/lib/svn-apache/mod_dav_svn.so, 10): Symbol not found:
> _svn_atomic__init_once\n  Referenced from:
> /opt/subversion/lib/libsvn_fs_base-1.0.dylib\n  Expected in: flat
> namespace\n
>
> This a clean install of OS X straight from Apple.  Apache works with the
> built-in svn-1.4.4 but not with the package from openCollabNet.  Is there
> other configuration required to make this work?
>
> The 1.5.1 binaries (svn, svnadmin etc) all run fine, its just using
> mod_dav_svn that has trouble.
>
> Any help would be greatly appreciated.
>
> Cheers
>
> Russell
>
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> To unsubscribe, e-mail: users-unsubscribe@...
> For additional commands, e-mail: users-help@...
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>

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[Jeremy Whitlock]

Just a little more information.  As I look into this, I don't think
the issue is with the binary itself.  The missing symbol is actually
there and after some fooling around, I have made some observations
that somewhat back my thoughts up.

When you start Apache by default, it runs in 64-bit mode.  Now there
are three ways to start Apache:

1) Using apachectl
2) Using /usr/sbin/httpd
3) Using launchd

What I've found is that I can get Apache to not only start completely
error free but Apache also serves Subversion properly using methods 2
and 3.  I can also launch this in all 4 known architectures.  (ppc,
i386, ppc64 and x86_64)  After performing this research, I really
think that apachectl is either broken or somehow is causing this
issue.  Running Apache directly (/usr/sbin/httpd) or using launchd has
no errors, warning and even runs as expected.

Russell,
    Can you tell me how you're starting Apache?

Take care,

Jeremy

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[Jeremy Whitlock]

Okay guys...for some closure, I've figured this out and it was
completely inline with what we mentioned was the answer a few weeks
ago.  When you use /usr/sbin/apachectl, it load /usr/sbin/envvars.
This creates a special DYLD_LIBRARY_PATH environment variable that
puts Leopard's default Subversion in front of the OSX binary I
maintain.  When this occurs, Apache has issues resolving symbols.  To
fix this, comment out the two lines defining and exporting the
DYLD_LIBRARY_PATH in /usr/sbin/envvars.

Take care,

Jeremy

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[smisaacs]

Hi,

I've run into this problem as well. I've gone through your edits, but now i get this error:

Syntax error on line 162 of /private/etc/apache2/httpd.conf: Cannot load /opt/subversion/lib/svn-apache/mod_dav_svn.so into server: dlopen(/opt/subversion/lib/svn-apache/mod_dav_svn.so, 10): Symbol not found: _svn_atomic__init_once\n  Referenced from: /opt/subversion/lib/libsvn_fs_base-1.0.dylib\n  Expected in: flat namespace\n


any change you can help me with this?

thanks,
-scott

Jeremy Whitlock wrote:

Okay guys...for some closure, I've figured this out and it was
completely inline with what we mentioned was the answer a few weeks
ago.  When you use /usr/sbin/apachectl, it load /usr/sbin/envvars.
This creates a special DYLD_LIBRARY_PATH environment variable that
puts Leopard's default Subversion in front of the OSX binary I
maintain.  When this occurs, Apache has issues resolving symbols.  To
fix this, comment out the two lines defining and exporting the
DYLD_LIBRARY_PATH in /usr/sbin/envvars.

Take care,

Jeremy

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