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From Hari Mailvaganam <hari...@gmail.com>
Subject Re: Apache-Tomcat Servlet Mapping Issues
Date Thu, 23 Jun 2005 00:03:00 GMT
Hi David:

An alternate to using mod_JK is to proxy http (or https) request to
the Tomcat from Apache.

i.e:
ProxyPass /path http://localhost:port/path
ProxyPassReverse /path http://localhost/path

There are valid reasons for using mod_JK - above just an alternate
suggestion if you can do without mod_JK

regards,

Hari Mailvaganam

On 6/22/05, David Rickard <David.Rickard@techbooks.com> wrote:
> System: Solaris SunOS 5.9
> Apache: 2.0.52
> Tomcat: 4.1.31
> Mod JK: 1.2.6
> The problem: Apache/mod_jk cannot resolve servlet URL mappings
> 
> When Tomcat is running stand-alone, it can resolve servlet mappings without
> any problems; so that a page with this form definition:
> <FORM name="login" method="POST" action="loginhandler">
> correctly invokes the com.company.LoginHandler servlet (which suggests
> there's nothing syntactically wrong with the <servlet> and
> <servlet-mapping> entries in web.xml);
> 
> When Tomcat stand-alone is turned off and Apache is turned on, that same
> page always throws a 404 error for "site/loginhandler"; these are the error
> messages in mod_jk.log:
> 
> [Wed Jun 22 09:04:08 2005]  [mod_jk.c (2313)]: mod_jk::jk_translate, check
> alias_dir: /usr/apache/tomcat/webapps
> [Wed Jun 22 09:04:08 2005]  [mod_jk.c (2337)]: mod_jk::jk_translate,
> AutoAlias child_dir: loginhandler
> [Wed Jun 22 09:04:08 2005]  [mod_jk.c (2363)]: mod_jk::jk_translate,
> AutoAlias OK for file: /usr/apache/tomcat/webapps/aiwosc/loginhandler
> [Wed Jun 22 09:04:08 2005]  [jk_uri_worker_map.c (445)]: Into
> jk_uri_worker_map_t::map_uri_to_worker
> [Wed Jun 22 09:04:08 2005]  [jk_uri_worker_map.c (459)]: Attempting to map
> URI '/aiwosc/loginhandler'
> [Wed Jun 22 09:04:08 2005]  [jk_uri_worker_map.c (577)]:
> jk_uri_worker_map_t::map_uri_to_worker, done without a match
> 
> What terribly simple configuration error have I made here?
> 
> These are the web.xml entries for this servlet:
>    <servlet>
>      <servlet-name>loginhandler</servlet-name>
>      <servlet-class>com.company.aiwosc.LoginHandler</servlet-class>
>    </servlet>
>    <servlet-mapping>
>      <servlet-name>loginhandler</servlet-name>
>      <url-pattern>/loginhandler</url-pattern>
>    </servlet-mapping>
> 
> This is the workers.properties file:
> worker.list=ajp13
> worker.ajp13.port=8009
> worker.ajp13.host=server.org
> worker.ajp13.type=ajp13
> 
> 
> This is the app section from mod_jk.conf:
>      #################### server.org:/aiwosc ####################
> 
>      # Static files
>      Alias /aiwosc "/var/apache/tomcat/webapps/aiwosc"
> 
>      <Directory "/var/apache/tomcat/webapps/aiwosc">
>          Options Indexes FollowSymLinks
>          DirectoryIndex index.html
>      </Directory>
> 
> 
>      # Deny direct access to WEB-INF and META-INF
>      #
>      <Location "/aiwosc/WEB-INF/*">
>          AllowOverride None
>          deny from all
>      </Location>
> 
>      <Location "/aiwosc/META-INF/*">
>          AllowOverride None
>          deny from all
>      </Location>
> 
>      JkMount /aiwosc/addtitleservlet  ajp13
>      JkMount /aiwosc/submittitleservlet  ajp13
>      JkMount /aiwosc/transfertitleservlet  ajp13
>      JkMount /aiwosc/saveoscservlet  ajp13
>      JkMount /aiwosc/reordercastservlet  ajp13
>      JkMount /aiwosc/loginhandler  ajp13
>      JkMount /aiwosc/editcategoryservlet  ajp13
>      JkMount /aiwosc/edittitleservlet  ajp13
>      JkMount /aiwosc/addaddendumservlet  ajp13
>      JkMount /aiwosc/*.jsp  ajp13
>      JkMount /aiwosc/addcategoryservlet  ajp13
> 
> This is the <Context> entry for the app in server.xml:
>          <!-- Oscars OSC Context -->
>          <Context path="/aiwosc" docBase="aiwosc" debug="5"
>                   reloadable="true" crossContext="true">
>           <Logger className="org.apache.catalina.logger.FileLogger"
>                   prefix="aiwosc_log." suffix=".txt"
>                   timestamp="true"/>
> 
>           <Resource name="jdbc/oscars" auth="Container"
>                     type="javax.sql.DataSource"/>
> 
>            <ResourceParams name="jdbc/oscars">
>             <parameter>
>              <name>factory</name>
>              <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
>             </parameter>
>             <parameter>
>              <name>driverClassName</name>
>              <value>oracle.jdbc.driver.OracleDriver</value>
>             </parameter>
>             <parameter>
>              <name>url</name>
>              <value>jdbc:oracle:thin:@gtsora2.gtsgraphics.com:1521:ACAD</value>
>             </parameter>
>             <parameter>
>              <name>username</name>
>              <value>IMPC_ADMIN</value>
>             </parameter>
>             <parameter>
>              <name>password</name>
>              <value>PIRANHA</value>
>             </parameter>
>             <parameter>
>              <name>maxActive</name>
>              <value>20</value>
>             </parameter>
>             <parameter>
>              <name>maxIdle</name>
>              <value>10</value>
>             </parameter>
>             <parameter>
>              <name>maxWait</name>
>              <value>-1</value>
>             </parameter>
>            </ResourceParams>
>          </Context>
> 
> And these are the mod_jk load/configuration entries from httpd.conf:
> <IfModule !mod_jk.c>
>          LoadModule jk_module modules/mod_jk.so
> </IfModule>
> 
> Include /usr/apache/tomcat/conf/auto/mod_jk.conf
> JkWorkersFile /usr/apache/tomcat/conf/workers.properties
> JkLogFile /usr/apache/logs/mod_jk.log
> JkLogLevel debug
> JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
> JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
> JkRequestLogFormat "%w %V %T"
> 
> JkAutoAlias /usr/apache/tomcat/webapps
> JkMount /*.jsp ajp13
> JkMount /*/servlet/ ajp13
> 
> 
> 
> 
> --
> 
> David Rickard
> Software Engineer
> 
> TechBooks/GTS
> Your Single Source Solution!
> Los Angeles CA * York, PA * Boston,MA * New Delhi, India
> Visit us on the World Wide Web
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> 
> david.rickard@techbooks.com
> 5650 Jillson St., Los Angeles, CA 90040
> (323) 888-8889 x331
> (323) 888-1849 (Fax)
> 
> 
>

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