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[cobalt-developers] Re: Installing Tomcat 4 with Apache on Cobalt

Hello William,

Thanks for the very helpful reply. Your assistance is much appreciated.

Here's the contents of my mod_jk.conf file:

JkWorkersFile /opt/catalina/conf/workers.properties
JkLogFile  /var/log/httpd/mod_jk.log
JkLogLevel error
JkMount /*.jsp ajp13
JkMount /servlet/* ajp13

And this is what I added to httpd.conf to get the mod_jk loaded:
<Location ~ ".*/WEB-INF/">
  AllowOverride None
  deny from all
</Location>

<Location ~ ".*/META-INF/">
  AllowOverride None
  deny from all
</Location>
LoadModule jk_module modules/mod_jk.so
Include /opt/jakarta-tomcat/conf/mod_jk.conf
I think you might be right in thinking the error is in here. Although I've tried various additional JkMount commands with no luck; i.e. /examples/*.jsp ajp13 and /examples/servlet/* ajp13 


It could be something as simple as the order you started things. Make
sure to start Tomcat and have it fully up and running before you start
Apache. I usually will wait almost a minute in between starting Tomcat
and then Apache.
This certainly could have been a problem as I've tried relentlessly different server.xml configs. Indeed the examples app does now indeed appear to be partially working. Browse http://www.r-hosts.com/examples to see what I mean. None of the servlets are found but some of the .jsps load correctly others report java errors. 

I had another look at the logs and noticed this in apache's:
2003-03-28 18:25:01 Internal Error: File /WEB-INF/web.xml not found
In an attempt to fix this (there is certainly no WEB-INF/web.xml directory in home/sites/site1/web directory only in the webapp directories within it, i.e. examples) I tried changing the Context docBase in server.xml to /home/sites/site1/web/examples rather than /home/sites/site1/web/ and ammending the JkMounts to include /examples at the beginning of their paths but then nothing worked – all .jsps had Tomcat reporting 404s again. 


This could have to do with the invoker being disabled in current
releases of Tomcat. This mainly is a problem with Servlets but can
effect JSPs as well. I have not found a recommended way around this
problem. I simply uncommented the invoker, and let it run as it used to
back in the day.

Look in the web.xml file next to your server.xml file. See if the
invoker servlet is commented out. If so uncomment it and restart Tomcat
and see what you get.

I've checked this and it looks enabled correctly.

Not sure where to go from here :-(
Thanks again for your generosity with your time; I was going quite potty with frustration! 


Peter



Hi William,

I've been trying for the past four days(!) to get Tomcat 4 running
correctly with Apache on Cobalt. Following your instructions at
http://list.cobalt.com/pipermail/cobalt-developers/2003-February/
038679.html I've got, I think, almost there.


Thanks for looking and doing all you can before asking. I am much more
inclined to help those willing to help themselves first.


Tomcat and JDK 1.4.1 were installed successfully – with the default
server.xml I could connect to www.r-hosts.com:8080/examples and run
them successfully.


Good so Tomcat is up and running.


Then the next step, installing mod_jk, went okay. I managed to compile
the mod_jk.so module from source and, by modifying httpd.conf, it
appears to load okay.


Did you also do the mappings for each virtual site in your httpd.conf?

JkMount /*.jsp ajp13
JkMount /servlet/* ajp13


However I'm having great difficulty configuring server.xml (and
possibly the JkMount parts of httpd.conf) to make my webapps available
on www.r-hosts.com/webapp/


Ok


My server.xml file is configured as follows:

<Server port="8005" shutdown="SHUTDOWN" debug="0">

   <Service name="Tomcat-Apache">

     <Connector className="org.apache.ajp.tomcat4.Ajp13Connector"
                port="8009" minProcessors="5" maxProcessors="75"
                acceptCount="10" debug="0"/>

     <Engine className="org.apache.catalina.connector.warp.WarpEngine"
             name="Apache"
             defaultHost="www.r-hosts.com"
             debug="0" appBase="webapps">

       <!-- Global logger unless overridden at lower levels -->
         <Logger className="org.apache.catalina.logger.FileLogger"
                  prefix="apache-." suffix=".log"
                 timestamp="true"/>

        <Host name="www.r-hosts.com">
             <Context path=""
                  docBase="/home/sites/site1/web"
                  crossContext="true"
                  debug="0"
                  reloadable="false"
                  trusted="false" >
            </Context>
         </Host>

     </Engine>
   </Service>
</Server>

When I browse http://www.r-home.com/examples I can browse the .html
files but .jsps report an internal server error.


Your server.xml file looks good. Keep in mind with this config, Tomcat
will only serve requests to Apache. It will not server direct requests
on port 8080. If you need that just add that part to your server.xml.
Get it out of the default server.xml. Although I do not use it and have
never needed it directly. I always use Tomcat with Apache.


The mod_jk log reports the following:
[Fri Mar 28 16:48:45 2003]  [jk_ajp_common.c (872)]: Error connecting
to the Tomcat process.
[Fri Mar 28 16:48:45 2003]  [jk_ajp_common.c (1181)]: In
jk_endpoint_t::service, ajp_send_request failed in send loop 2
[Fri Mar 28 16:48:45 2003]  [jk_ajp_common.c (1375)]: Into
jk_endpoint_t::done, closing connection 0
[Fri Mar 28 16:48:45 2003]  [jk_ajp_common.c (561)]: In
jk_endpoint_t::ajp_close_endpoint
[Fri Mar 28 16:48:45 2003]  [jk_uri_worker_map.c (460)]: Into
jk_uri_worker_map_t::map_uri_to_worker


It could be something as simple as the order you started things. Make
sure to start Tomcat and have it fully up and running before you start
Apache. I usually will wait almost a minute in between starting Tomcat
and then Apache.


The examples log this:
LifecycleException:  Container StandardContext[/examples] has not been
started
         at
org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1147)
         at
org.apache.catalina.core.StandardContext.stop(StandardContext.java:349 5) 
         at
org.apache.catalina.core.StandardContext.start(StandardContext.java:34 34 
)
         at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
         at
org.apache.catalina.core.StandardHost.start(StandardHost.java:638)
         at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
         at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343)
         at
org.apache.catalina.core.StandardService.start(StandardService.java:38 8) 
         at
org.apache.catalina.core.StandardServer.start(StandardServer.java:506)
at org.apache.catalina.startup.Catalina.start(Catalina.java:781) 
         at
org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
         at
org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
         at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.j av 
a:39)
         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccess or 
Impl.java:25)
         at java.lang.reflect.Method.invoke(Method.java:324)
         at
org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)


This could have to do with the invoker being disabled in current
releases of Tomcat. This mainly is a problem with Servlets but can
effect JSPs as well. I have not found a recommended way around this
problem. I simply uncommented the invoker, and let it run as it used to
back in the day.

Look in the web.xml file next to your server.xml file. See if the
invoker servlet is commented out. If so uncomment it and restart Tomcat
and see what you get.


Any light you could shed upon the problem would be much appreciated.
And if you are willing to help me fix the problem I could give you
access to the machine – just let me know what your quote would be for
the work.


Hopefully that will not be needed. As for payment, that also should not
be necessary unless you want me to stop what I am doing and focus on
helping you to get up and running. For that I would charge a flat rate
that we can negotiate. However I am pretty sure with patience we can get 
things going at no expense to you other than time.


If you could just get the examples running successfully on the
www.r-hosts.com virtual host I think I can get the various other
webapps I have on other sites going on that template.


Great a goal. Yes, once one is up and running, others will be allot
easier.


My set up is almost exactly as you recommended with the exception that
tomcat and my jdk are in /home – I've created symbolic links in opt
– and I'm using an external file called from httpd.conf in
$CATALINA/conf/mod_jk.conf to issue all the JkWorkers, JkMount etc.
commands.
It all about personal preferences. I do not care where you put stuff, or 
where you put your config. Just so long as it's all there.
I would be curious to see the contents of your mod_jk.conf. Just to make 
sure there is not a problem there.

That could make or break things. It definitely seems like your problem
is with Apache and Tomcat. Not a big one to trouble shoot.

Let me know and we will go from there.

--
Sincerely,
William L. Thomson Jr.
Support Group
Obsidian-Studios, Inc.
3548 Jamestown Ln.
Jacksonville, FL 32223
Phone/Fax  904.260.2445
http://www.obsidian-studios.com







Hi William,
I've been trying for the past four days(!) to get Tomcat 4 running correctly with Apache on Cobalt. Following your instructions at http://list.cobalt.com/pipermail/cobalt-developers/2003-February/ 038679.html I've got, I think, almost there.
Tomcat and JDK 1.4.1 were installed successfully – with the default server.xml I could connect to www.r-hosts.com:8080/examples and run them successfully.
Then the next step, installing mod_jk, went okay. I managed to compile the mod_jk.so module from source and, by modifying httpd.conf, it appears to load okay.
However I'm having great difficulty configuring server.xml (and possibly the JkMount parts of httpd.conf) to make my webapps available on www.r-hosts.com/webapp/ 

My server.xml file is configured as follows:

<Server port="8005" shutdown="SHUTDOWN" debug="0">

  <Service name="Tomcat-Apache">

    <Connector className="org.apache.ajp.tomcat4.Ajp13Connector"
               port="8009" minProcessors="5" maxProcessors="75"
               acceptCount="10" debug="0"/>

    <Engine className="org.apache.catalina.connector.warp.WarpEngine"
            name="Apache"
            defaultHost="www.r-hosts.com"
            debug="0" appBase="webapps">

      <!-- Global logger unless overridden at lower levels -->
        <Logger className="org.apache.catalina.logger.FileLogger"
                 prefix="apache-." suffix=".log"
                timestamp="true"/>

       <Host name="www.r-hosts.com">
            <Context path=""
                 docBase="/home/sites/site1/web"
                 crossContext="true"
                 debug="0"
                 reloadable="false"
                 trusted="false" >
           </Context>
        </Host>

    </Engine>
  </Service>
</Server>
When I browse http://www.r-home.com/examples I can browse the .html files but .jsps report an internal server error. 

The mod_jk log reports the following:
[Fri Mar 28 16:48:45 2003] [jk_ajp_common.c (872)]: Error connecting to the Tomcat process. [Fri Mar 28 16:48:45 2003] [jk_ajp_common.c (1181)]: In jk_endpoint_t::service, ajp_send_request failed in send loop 2 [Fri Mar 28 16:48:45 2003] [jk_ajp_common.c (1375)]: Into jk_endpoint_t::done, closing connection 0 [Fri Mar 28 16:48:45 2003] [jk_ajp_common.c (561)]: In jk_endpoint_t::ajp_close_endpoint [Fri Mar 28 16:48:45 2003] [jk_uri_worker_map.c (460)]: Into jk_uri_worker_map_t::map_uri_to_worker 

The examples log this:
LifecycleException: Container StandardContext[/examples] has not been started at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1147) at org.apache.catalina.core.StandardContext.stop(StandardContext.java:349 5) at org.apache.catalina.core.StandardContext.start(StandardContext.java:34 34) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123) at org.apache.catalina.core.StandardHost.start(StandardHost.java:638) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343) at org.apache.catalina.core.StandardService.start(StandardService.java:38 8) at org.apache.catalina.core.StandardServer.start(StandardServer.java:506) at org.apache.catalina.startup.Catalina.start(Catalina.java:781) at org.apache.catalina.startup.Catalina.execute(Catalina.java:681) at org.apache.catalina.startup.Catalina.process(Catalina.java:179) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.j ava:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccess orImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
Any light you could shed upon the problem would be much appreciated. And if you are willing to help me fix the problem I could give you access to the machine – just let me know what your quote would be for the work.
If you could just get the examples running successfully on the www.r-hosts.com virtual host I think I can get the various other webapps I have on other sites going on that template.
My set up is almost exactly as you recommended with the exception that tomcat and my jdk are in /home – I've created symbolic links in opt – and I'm using an external file called from httpd.conf in $CATALINA/conf/mod_jk.conf to issue all the JkWorkers, JkMount etc. commands. 

Thanks,


Peter