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From "lahiru gunathilake" <glah...@gmail.com>
Subject Re: Loading mod_axis2.so module into Apache
Date Wed, 16 Jul 2008 19:35:03 GMT
On Thu, Jul 17, 2008 at 12:58 AM, lahiru gunathilake <glahiru@gmail.com>
wrote:

> Hi Alex,
>
> I think you have to set AXIS2C_HOME environment variable on your server
> machine.
>
You don't need to set the environment variable but you are suppose to change
the Axis2RepoPath in the Apache config file.

> And why are you copying libraries from one machine to another why don't you
> compile Axis2C on you server machine.AFAIK if your first machine and the
> second machine are different,different in the sense first machine is dual
> core and the server machine is core 2 duo or something else you have to
> recompile Axis2C on your server machine and create libmod_axis2.so otherwise
> previously compiled library won't work on the server machine.
>
> Regards
> Lahiru
>
>
> On Thu, Jul 17, 2008 at 12:03 AM, Alex Bolgarov <alex@bolgarov.org> wrote:
>
>> Hi,
>>
>> How do you load a mod_axis2.so module into the Apache when you copy
>> the Axis2/C libraries to some directory - for example, when you are
>> using the binary Axis2/C distribution, or just build Axis2/C from
>> source on one machine (and installed itto some directory) and then
>> copy Axis2/C module and libraries to some directory on some othar
>> machine with Apache server?
>>
>> Well, here is a longer description of the problem:
>>
>> Say I'm using a source distribution. I download the .tar.gz source
>> tarball, untar, configure it with some install directory (--prefix)
>> and build/install it, now I have this install directory with the build
>> by me Axis2/C.
>>
>> I have Apache server running in this machine, so I copy mod_axis2.so
>> into the Apache installation, I update the Apache config to load the
>> module, I define the Axis2/C repository, I develop a web service and
>> run tests against it. All is fine up to this point.
>>
>> Now I want to use the Axis2/C with the Apache server that is running
>> on another machine.
>>
>> I copy everything from the install directory from the build machine
>> into some directory on this other machine with Apache (let's call this
>> directory "/home/alex/axis2c-dist").
>>
>> I rename libmod_axis2.so.0.4.0 to mod_axis2.so and copy it into the
>> Apache's modules directory.
>>
>> Now I change the Apache config file so that it contains the line
>>
>>    LoadModule axis2_module modules/mod_axis2.so
>>
>> I try to start Apache:
>>
>>    $ apachectl start
>>
>> and see following error:
>>
>> Cannot load /home/alex/httpd/modules/mod_axis2.so into server:
>> libaxis2_engine.so.0: cannot open shared object file: No such file or
>> directory
>>
>> Now, I happen to know about the LoadFile Apache directive :)
>>
>> I add the LoadFile directive for the libaxis2_engine.so so that Apache
>
> Normally you don't need to add a LoadFile directive.

Lahiru

>
>> loads it from the /home/alex/axis2c-dist directory, now the Apache
>> config looks like this:
>>
>>    LoadFile /home/alex/axis2c-dist/lib/libaxis2_engine.so.0.4.0
>>    LoadModule axis2_module modules/mod_axis2.so
>>
>> I try to start Apache again:
>>
>>    $ apachectl start
>>
>> and now see:
>>
>> Cannot load /home/alex/axis2c-dist/lib/libaxis2_engine.so.0.4.0 into
>> server: libneethi.so.0: cannot open shared object file: No such file
>> or directory
>>
>> OK, I add LoadFile directives for the libneethi.so, and so on, when I
>> finally arrive to the following config:
>>
>>    LoadFile /home/alex/axis2c-dist/lib/libaxutil.so.0.4.0
>>    LoadFile /home/alex/axis2c-dist/lib/libguththila.so.0.4.0
>>    LoadFile /home/alex/axis2c-dist/lib/libaxis2_parser.so.0.4.0
>>    LoadFile /home/alex/axis2c-dist/lib/libaxis2_axiom.so.0.4.0
>>    LoadFile /home/alex/axis2c-dist/lib/libneethi.so.0.4.0
>>    LoadFile /home/alex/axis2c-dist/lib/libaxis2_http_common.so.0.4.0
>>    LoadFile /home/alex/axis2c-dist/lib/libaxis2_engine.so.0.4.0
>>
>>    LoadModule axis2_module modules/mod_axis2.so
>>
>> But now, after I try to start Apache, I see new error:
>>
>> Cannot load /home/alex/axis2c-dist/lib/libaxis2_http_common.so.0.4.0
>> into server: /home/alex/axis2c-dist/lib/libaxis2_http_common.so.0.4.0:
>> undefined symbol: axis2_handler_invoke
>>
>> Which means that the libaxis2_engine.so depends on the
>> libaxis2_http_common.so, and requires it to be loaded by Apache first,
>> but the libaxis2_http_common.so contains a reference to undefined
>> symbol "axis2_handler_invoke", that is defined by the
>> libaxis2_engine.so. (Yes, I used 'nm libaxis2_engine.so | grep
>> axis2_handler_invoke" to check that this symbol is indeed defined in
>> this library.)
>>
>> Circular dependency?
>>
>> How do I break it?
>>
>> (note that the same thing happens if I download the binary
>> distribution, untar it into some directory and copy the mod_axis2 into
>> the Apache moddules directory. Up to the same point I can use LoadFile
>> to load Axis2/C libraries, but then again I see this circular
>> dependency)
>>
>>
>> Thank you,
>>
>>    alex.
>>
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>>
>

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