Can you tell what the following means:
[jk_uri_worker_map.c (345)]: Into jk_uri_worker_map_t::map_uri_to_worker
[jk_uri_worker_map.c (435)]: jk_uri_worker_map_t::map_uri_to_worker, done without a
match
Orlando
Jan Labanowski wrote:
> On Sat, 11 Aug 2001 [EMAIL PROTECTED] wrote:
>
> > I am trying to get tomcat to work according to the tomcat-apache-howto:
> >
> > I want apache to serve static files as it has been doing and pass .jsp and servlet
> > requests to tomcat:
> >
> > How will they work together?
> >
> > In a nutshell a web server is waiting for requests. When these
> > requests arrive the server does whatever is needed
> > to serve the requests by providing the necessary content. Adding
> > Tomcat to the mix may somewhat change this
> > behavior. Now the web server needs to perform the following:
> >
> > Before the first request can be served, Apache needs to load a
> > web server adapter library (so Tomcat can
> > communicate with Apache) and initialize it.
> > When a request arrives, Apache needs to check and see if it
> > belongs to a servlet; if so it needs to let the
> > adapter take the request and handle it.
> >
> > We'd like Apache to handle our static content, such as images and HTML
> > documents, and forward all requests for
> > dynamic content to Tomcat. More specifically, we need answers to the
> > following questions:
> >
> > 1. How will Apache know which request / type of requests
> > should be forwarded to Tomcat?
>
> ==================================
> Through the stuff which you provided in mod_jk.conf file which is usually
> included in the Apache's httpd.conf at the end.
> This file contains instructions which tell Apache which stuff to
> process by itself and which stuff to send to Tomcat:
> For example:
>
> JkWorkersFile /usr/local/tomcat_3.2.1/tomcat-3.2.1/conf/workers.properties
> # Tells where is the workers properties
>
> JkLogFile /usr/local/tomcat_3.2.1/tomcat-3.2.1/logs/mod_jk.log
> # where is the log file to write to
>
> Alias /examples "/usr/local/tomcat_3.2.1/tomcat-3.2.1/webapps/examples"
> That URIs which start from /examples are located in this physical directory
>
> <Directory "/usr/local/tomcat_3.2.1/tomcat-3.2.1/webapps/examples">
> Options Indexes FollowSymLinks
> </Directory>
> That this directory should use these options
>
> #
> # The following line mounts all JSP files and the /servlet/ uri to tomcat
> #
> JkMount /examples/servlet/* ajp13
> That URIs with this structure should be sent to Tomcat
>
> JkMount /examples/*.jsp ajp13
> That URIs with this structure should be sent to Tomcat
> ====================================
>
> > 2. How will Apache forward these requests to Tomcat?
>
> ===================================
> You start Tomcat before apache. Tomcat runs and opens the listening socket
> on the port which you specified in server.xml. Tomcat acts as TCP server
> and LISTENS for requests from Apache.
> Then you start Apache. Apache knows now (mod_jk.conf) where to send
> the requests for JSP and servlets. When request arrives, Apache sends
> the request to Tomcat (Apache is a client in the Apache Tomcat communication).
> The Tomcat and apache talk via special language called ajp13 (in this case)
> and after Tomcat is finished, it send the response back to Apache, and
> Apache send it back to the browser which requested it.
> ===================================
>
> > 3. How will Tomcat accept and handle these requests?
>
> Tomcat can be a Web server, but in the case of its interaction with Apache
> these functions are not used, and in fact should be blicked in server.xml.
> When Tomcat works with Apache, they talk to each other via special protocol
> using the TCP Socket. The protocol is not HTTP, it is Apache JServ Protocol
> or whatever it was called in the Middle Ages. Tomcat is a server in this
> case, and does all the processing of JSP and Servlets for Apache.
> Than it returns resulting HTML to Apache, so Apache can send it to the
> browser which requested it.
>
> ========================
>
> >
> > The majority of our time will be spent dealing with points 1 and 2; 3
> > should be a snap!
> >
> > What's required to pull this off?
> >
> > Answers to the above three questions!
> >
> > 1. Modify Apache's httpd.conf file.
> > 2. Install a web server adapter.
> > 3. Modify Tomcat's server.xml file.
> >
> > It is assumed that you are comfortable modifying the configuration of
> > Tomcat and Apache separately before you've
> > attempted to integrate the two. As such, we speak in
> > Tomcat/Apache/Servlet lingo, not pausing to explain what's
> > already been taught in their respective user guides. Details on Tomcat
> > setup can be found in the Tomcat User's
> > Guide, while Apache configuration information can be found in the
> > Apache User's Guide.
> >
> > Did I misunderstand this howto?
> > So do I really need to have tomcat running if I am using mod_jk?
>
> Yes... mod_jk is just a connector, i.e., connects Apache and Tomcat.
> It has no processing functions beside send request to Tomcat, and get
> response back from Tomcat. Tomcat does the actual processing. Apache
> is just a client of Tomcat for requests which require JSP/Servlets
> which Apache does not know how to do.
>
> >
> > Thank you,
> >
> > Orlando
> >
> >
> > Jan Labanowski wrote:
> >
> > > I am not sure what you are trying to do...
> > >
> > > If you want to do virtual hosts in Apache, then do them in Apache.
> > > In this case, Tomcat does not know anything about virtual hosts,
> > > and processes stuff which is handled to it via a connector.
> > > In the httpd.conf you specify your virtual hosts between the
> > >
> > > <VirtualHost address:port>
> > >
> > > Regular stuff like ServerAdmin, DocumentRoot, etc. and
> > > stuff, including your mod_jk stuff like:
> > >
> > > JkWorkersFile path
> > > JkLogFile path1
> > > JkLogLevel error
> > > JkMount /*.jsp ajp13
> > > JkMount /servlet/* ajp13
> > > Alias /examples "/jakarta_3.2.1/jakarta-tomcat-3.2.1/webapps/examples"
> > > <Directory "/jakarta_3.2.1/jakarta-tomcat-3.2.1/webapps/examples">
> > > Options Indexes FollowSymLinks
> > > </Directory>
> > > JkMount /examples/servlet/* ajp13
> > > JkMount /examples/*.jsp ajp13
> > > ....
> > > </VirtualHost>
> > >
> > > And on the Tomcat site you do not know anything about virtual hosts,
> > > since Tomcat processes what it gets from Apache via connector and
> > > has no say in how requests are forwarded to it (Apache is the boss here).
> > > You do not use the <host> tag in server.xml and use regular workers.properties
> > >
> > > When you do virtual hosts in Tomcat, then you do not use Apache, and
> > > talk HTTP to the outside world directly. In other words, Tomcat is your
> > > web server, and you configure virtual hosts in tomcat, and do not talk
> > > to apache, but to a client (browser) directly. Then you do not need mod_jk
> > > and you do not need Apache. You use Tomcat a standalone Web server which
> > > has nothing to do with Apache.
> > >
> > > On Sat, 11 Aug 2001 [EMAIL PROTECTED] wrote:
> > >
> > > > I have tried to start tomcat with both a generic server.xml and one that
> > > > I modified according to the mod_jk-howto and emails from the group.
> > > > In both instances, the worker.properties file remained the same as outlined in
> > > > this email thread(see below).
> > > > It seems that both setups yield the same logfile output. However, I do not see
> > > > any instances of tomcat processes running when using the modified server.xml.
> > > >
> > > > The only mod to that file being the extra Host entry:
> > > >
> > > > <Host name="www.netcrackers.com" >
> > > > <Context path=""
> > > > docBase="/home/vs04025/jspwebapps" />
> > > > crossContext="false"
> > > > debug="0"
> > > > reloadable="true" >
> > > > </Context>
> > > >
> > > > </Host>
> > > >
> > > >
> > > ... rest deleted ....
> > >
> > > Jan K. Labanowski | phone: 614-292-9279, FAX: 614-292-7168
> > > Ohio Supercomputer Center | Internet: [EMAIL PROTECTED]
> > > 1224 Kinnear Rd, | http://www.ccl.net/chemistry.html
> > > Columbus, OH 43212-1163 | http://www.osc.edu/
> >
>
> Jan K. Labanowski | phone: 614-292-9279, FAX: 614-292-7168
> Ohio Supercomputer Center | Internet: [EMAIL PROTECTED]
> 1224 Kinnear Rd, | http://www.ccl.net/chemistry.html
> Columbus, OH 43212-1163 | http://www.osc.edu/
