[Clas_offline] CLASWEB Migration Status -- Progress on Pezca... Ready to switch?

[nerses at jlab.org]

Fixed by commenting out the following line in both scripts:

#use lib
('/group/clas/www/clasweb/htbin/PERL_CPAN/lib/site_perl/5.6.0/i686-linux');

Nerses


> These don't work too:
> http://claswebnew.jlab.org/cgi-bin/spin_rotation/magic_energies.pl
> http://claswebnew.jlab.org/cgi-bin/spin_rotation/spin_rotation.pl
>
> -Eugene
>
> On 01/06/11 09:12, Eugene Pasyuk wrote:
>> Hi Marty,
>>
>> These two applications still don't show plots:
>> http://claswebnew.jlab.org/cgi-bin/epics_history/epics.pl
>> http://claswebnew.jlab.org/cgi-bin/ONLINE_TIMELINE/timeline_frames.pl
>>
>> I believe it is gnuplot issue.
>> You managed to fix it in
>> http://claswebnew.jlab.org/cgi-bin/HALL_ABC/top_frame-MEW.pl
>> It displays plots generated by gnuplot.
>> Probably should be similar fix in those too.
>>
>> -Eugene
>>
>> On 01/06/11 06:52, Marty Wise wrote:
>>>
>>> All,
>>>
>>> Using the Pezca-0.4 source package, I was able to build and install
>>> it into our central /apps version of perl without having to build or
>>> make any parts of the EPICS distribution available to it. At runtime,
>>> the package still needs access to a couple of EPICS shared libraries,
>>> but this is easily arranged through LD_LIBRARY_PATH. The bottom line
>>> is that I have a working example of this new configuration.  If you
>>> access the URL:
>>> http://claswebnew.jlab.org/cgi-bin/HALL_ABC/top_frame-MEW.pl, you'll
>>> see an example of the configuration at work. This page is a
>>> _/slighlty/_ modified version of the original --
>>> http://claswebnew.jlab.org/cgi-bin/HALL_ABC/top_frame.pl which does
>>> not work.
>>>
>>> After building Pezca into /apps Perl, I made a small modification to
>>> the top_frame-MEW.pl script mentioned above. All I had to do was
>>> comment out the line:
>>>
>>>     #use lib
>>> ('/group/clas/www/clasweb/htbin/PERL_CPAN/lib/site_perl/5.6.0/i686-linux');
>>>
>>> This change removes the explicit reference to the perl library
>>> installation down in /group/clas/www/clasweb/... Since the script
>>> uses /apps/bin/perl, it Is able to find the Pezca module in the apps
>>> build.
>>>
>>> To address the runtime dependence on the epics shlibs, I set
>>> LD_LIBRARY_PATH in the web server configuration to include a
>>> temporary directory into which I've placed the libca, libCom and
>>> libezca shared libraries.
>>>
>>> This seems to work, though it's hard to be sure since I'm not very
>>> familiar with them.
>>>
>>> The problem is that with the explicit library reference, there is no
>>> way to fix this without modifying all the scripts individually. You
>>> guys have a number of scripts configured like this. Changing them now
>>> will break them on the running clasweb. I can easily find and fix
>>> most of these problems, but, I will need to do it as part of the
>>> cutover.
>>>
>>> So... given these results, if nobody sees any problem with these
>>> changes, can we plan to do the switch to the new server today? I will
>>> need to have both the new and old servers offline for an hour or two
>>> to make all the necessary changes. Then, there will certainly still
>>> be other problems that turn up afterward. These will need to be dealt
>>> with as they are discovered. I think, however, that all the major
>>> stuff that has been seen has been addressed.
>>>
>>> I should also point out that reverting back to the original server in
>>> the event of insurmountable problems of some kind will require a
>>> similar 1-2 hour outage to switch back. Personally, I hate to go back
>>> in general, and in this case, RHEL3 (on the current clasweb) is
>>> obsolete and no longer supported, and has been holding up a number of
>>> projects you guys have asked for that require newer software versions
>>> -- e.g. newer MediaWiki, MantisBT, DocDB, etc.
>>>
>>> So, can I move forward with the switch? If so, when is a good time?
>>>
>>> Marty
>>>
>>>
>>> _______________________________________________
>>> Clas_offline mailing list
>>> Clas_offline at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/clas_offline
>>
>>
>> _______________________________________________
>> Clas_offline mailing list
>> Clas_offline at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/clas_offline
> _______________________________________________
> Clas_offline mailing list
> Clas_offline at jlab.org
> https://mailman.jlab.org/mailman/listinfo/clas_offline