RE: [enhydra] how to download and install enhydra_conductor

["christoph moar" <christoph.moar@xxxxxxxx>]

Hello Phoebe,
thanks for your input, it is very valuable to me. In the meantime
i did manage to download: "enhydra-conductor-6.0-1.src.rpm"
and compile it on my platform (centos 4.1, alias redhat enterprise
x86_64 bit platform).
i had to make some changes in the SPEC file, i attach the patch
if anyone is interested.

you write:

> rest. During testing, I notice the load balancing did work,
> but with heavy testing, the apache crashed with an error
> msg. I googled the message and found out it is a known
> problem. I also email other developers to verify they had
> the same problem. Then, I gave up the idea of using
> mod_jk2. 

this is serious info for me. can you tell me what error shows
up or the google links so i will monitor during our test phase 
and see if the same thing happens to me too? that would be
really helpful!

> I am now using mod_proxy and mod_rewrite to do
> simple load balancing (it is not pretty), but it works. 

yeah, i know. from what you say, i'll probably switch to
that also. since i already installed the conductor, i might
as well test it for a few days.

> Now, apache comes out with a new version, guess what, they
> no longer support mod_jk2. Therefore, I think it would not
> be a good idea to use mod_jk2. 

oh. didn't know that. what a mess, if you ask me. there's 
something like 5 different ways to connect tomcat to apache
and no stable one in sight? sigh! i heard also that they will
probably add a tomcat connector to mod_proxy, so maybe you
are right and that is the right way to do it? just don't
know.

what i would like to know from the enhydra developers:

know i have installed (on the production machine):

enhydra-runtime-6.5-1
enhydra-conductor-6.0-1

i do not know exactly what version of tomcat is in the
runtime and the conductor. do they (have to) match? should
i download the conductor tar.gz from the apache site
(which version?) instead? or should i probably just forget 
it all and use mod_proxy instead, like phoebe is 
(probably correctly) suggesting?

any hints?

and another thing: when i start apache i get:
[Wed Oct 12 18:02:04 2005] [error] jk2_init() Can't find child 28796 in
scoreboard
[Wed Oct 12 18:02:04 2005] [error] mod_jk child init 1 -2
[Wed Oct 12 18:02:04 2005] [error] jk2_init() Can't find child 28797 in
scoreboard
[Wed Oct 12 18:02:04 2005] [error] mod_jk child init 1 -2
[Wed Oct 12 18:02:04 2005] [error] jk2_init() Can't find child 28799 in
scoreboard
[Wed Oct 12 18:02:04 2005] [error] mod_jk child init 1 -2
[Wed Oct 12 18:02:04 2005] [error] jk2_init() Can't find child 28800 in
scoreboard
[Wed Oct 12 18:02:04 2005] [error] mod_jk child init 1 -2
[Wed Oct 12 18:02:04 2005] [error] jk2_init() Can't find child 28801 in
scoreboard
[Wed Oct 12 18:02:04 2005] [error] mod_jk child init 1 -2
[Wed Oct 12 18:02:04 2005] [error] jk2_init() Can't find child 28802 in
scoreboard
[Wed Oct 12 18:02:04 2005] [error] mod_jk child init 1 -2
[Wed Oct 12 18:02:04 2005] [error] jk2_init() Can't find child 28803 in
scoreboard
[Wed Oct 12 18:02:04 2005] [error] mod_jk child init 1 -2
[Wed Oct 12 18:02:04 2005] [notice] Apache configured -- resuming normal
operations

i am still googl'in on this, but maybe anyone knows what it means?
the whole system seems to work fine, tough.

regards
christoph

--
http://www.alpin.it         software, consulting & strategy

Christoph Moar                          Dipl. Inform. Univ.
alpin gmbh srl          management & technology consultants
tel +39 0471 056007 fax +39 0471 056005 gsm +39 348 3057012
lanciastr. 8b  via lancia 8b    bozen 39100 bolzano   italy
http://www.alpin.it                 christoph.moar@xxxxxxxx
 

> -----Original Message-----
> From: Phoebe Whitefield [mailto:pwhitefield@xxxxxxxxxxxx] 
> Sent: Wednesday, October 12, 2005 5:23 PM
> To: enhydra@xxxxxxxxxxxxx
> Subject: Re: [enhydra] how to download and install enhydra_conductor
> 
> On Wed, 12 Oct 2005 10:24:56 +0200
>  "christoph moar" <christoph.moar@xxxxxxxx> wrote:
> > Hi,
> > i want to setup apache with tomcat/enhydra and have read
> > all the available
> > documentation. i had other projects where i used
> > mod_proxy alone or the
> > old enhydra director.
> > i read the documentation and i think what it says is that
> > the new mod_jk2
> > should be the state of the art to use. i tried reading
> > mod_webapp to see
> > if any of the other variants should be followed, but it
> > all sums up to me
> > that
> > all can connect tomcat to apache and maybe mod_jk2 should
> > be the one
> > to use. well, i'd say i'll try it.
> >  
> > the question is:
> > - on the production server i have installed
> > enhydra-6.5-runtime
> >  
> > how to i install the enhydra conductor now?
> > - should i download the tomcat sources and get mod_jk2
> > compiled?
> > - or should i download a rpm/tgz from enhydra
> > sourceforge?
> >  
> > i tried looking on the sourceforge page but could not
> > really find any link
> > there
> > to conductor. the only thing i found by googling was a
> > link to 
> >  
> >
> https://forge.objectweb.org/project/download.php?group_id=21
> >
> <https://forge.objectweb.org/project/download.php?group_id=21&;
> file_id=2687>
> > &file_id=2687
> >  
> > which states this is conductor 6.0-1
> >  
> > is this what i should be using?
> >  
> > thanks and best regards for your response
> > christoph moar
> >  
> > 
> > --
> > http://www.alpin.it <http://www.alpin.it/>
> >          software, consulting &
> > strategy
> > 
> > Christoph Moar                          Dipl. Inform.
> > Univ.
> > alpin gmbh srl          management & technology
> > consultants
> > tel +39 0471 056007 fax +39 0471 056005 gsm +39 348
> > 3057012
> > lanciastr. 8b  via lancia 8b    bozen 39100 bolzano
> >   italy
> > http://www.alpin.it <http://www.alpin.it/>
> > christoph.moar@xxxxxxxx
> > 
> > 
> 
> 
> Hi,
> 
> I had Enhydra 6.4.1 installed on my development machine and
> the production machine. In the production environment, we
> use apache as our web server. I also had to configure
> apache to talk to tomcat and do the load balancing. I
> downloaded mod_jk2, had the workers.properties and the
> rest. During testing, I notice the load balancing did work,
> but with heavy testing, the apache crashed with an error
> msg. I googled the message and found out it is a known
> problem. I also email other developers to verify they had
> the same problem. Then, I gave up the idea of using
> mod_jk2. I am now using mod_proxy and mod_rewrite to do
> simple load balancing (it is not pretty), but it works. 
> 
> Now, apache comes out with a new version, guess what, they
> no longer support mod_jk2. Therefore, I think it would not
> be a good idea to use mod_jk2. 
> 
> Hope this help. If you really would like to try out the
> mod_jk2. I can send you my configuration files and how I
> did my setup.
> 
> Phoebe
> 
>

Attachment: enhydra-conductor.patch
Description: Binary data