Connecting tomcat6 to apache2

Disclaimier: Not a server admin

I've been scratching my head over this for weeks now (not consistently mind you, as that would be maddening). I've been trying to connect my apache2 server to my tomcat server to the point where if someone encounters *.jsp or any servelet in navigating my web directory, it's handed over to tomcat.

I have both Apache2.0 (port 9099) and Tomcat6 (9089) running on Debian lenny on the same box.

Currently, mod_jk is enabled with mod_jk.conf in $apacheHOME/mods-enabled/ with content:

    # Where to find workers.properties
JkWorkersFile /etc/apache2/workers.properties
    # Where to put jk shared memory
JkShmFile     /var/log/at_jk/mod_jk.shm
    # Where to put jk logs
JkLogFile     /var/log/at_jk/mod_jk.log
    # Set the jk log level [debug/error/info]
JkLogLevel    info
    # Select the timestamp log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
    # Send servlet for context /examples to worker named worker1
JkMount  /*/servlet/* worker1
    # Send JSPs  for context /examples to worker named worker1
JkMount  /*.jsp worker1

my workers.properties located in $apacheHOME/ with content:

workers.tomcat_home=/var/lib/tomcat6
workers.java_home=/usr/lib/jdk1.6.0_23/db/
worker.list=worker1
ps=/

worker.worker1.port=9081
worker.worker1.host=localhost
worker.worker1.type=ajp13

my web.xml in $tomcatHOME/conf has the following servlets enabled

<servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-cla$
    <init-param>
        <param-name>debug</param-name>
        <param-value>0</param-value>
    </init-param>
    <init-param>
        <param-name>listings</param-name>
        <param-value>false</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>


<servlet>
    <servlet-name>jsp</servlet-name>
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
    <init-param>
        <param-name>fork</param-name>
        <param-value>false</param-value>
    </init-param>
    <init-param>
        <param-name>xpoweredBy</param-name>
        <param-value>false</param-value>
    </init-param>
    <load-on-startup>3</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>jsp</servlet-name>
    <url-pattern>*.jsp</url-pattern>
</servlet-mapping>

<session-config>
    <session-timeout>30</session-timeout>
</session-config>

server.xml :

--> -->

<!-- Define an AJP 1.3 Connector on port 8009 -->

<Connector port="9081" protocol="AJP/1.3" redirectPort="9088" />

mod_jk.log :

[Mon Feb 21 13:49:35 2011] [2921:3075307264] [info] jk_open_socket::jk_connect.c (566): connect to 127.0.0.1:9081 failed (errno=111)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [info] ajp_connect_to_endpoint::jk_ajp_common.c (869): Failed opening socket to (127.0.0.1:9081) (errno=111)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [error] ajp_send_request::jk_ajp_common.c (1359): (worker1) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=111)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [info] ajp_service::jk_ajp_common.c (2194): (worker1) sending request to tomcat failed (recoverable), because of error during request sending (attempt=1)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [info] jk_open_socket::jk_connect.c (566): connect to 127.0.0.1:9081 failed (errno=111)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [info] ajp_connect_to_endpoint::jk_ajp_common.c (869): Failed opening socket to (127.0.0.1:9081) (errno=111)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [error] ajp_send_request::jk_ajp_common.c (1359): (worker1) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=111)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [info] ajp_service::jk_ajp_common.c (2194): (worker1) sending request to tomcat failed (recoverable), because of error during request sending (attempt=2)
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [error] ajp_service::jk_ajp_common.c (2212): (worker1) Connecting to tomcat failed. Tomcat is probably not started or is listening on the wrong port
[Mon Feb 21 13:49:35 2011] [2921:3075307264] [info] jk_handler::mod_jk.c (2364): Service error=-3 for worker=worker1

There appears to be an issue with port 9081, no process is using it, so I would suppose it's configured incorrectly. Though my tomcat port works fine.

 ickronia:/var/log/at_jk# telnet localhost 9081
 Trying ::1...
 Trying 127.0.0.1...
 telnet: Unable to connect to remote host: Connection refused
 ickronia:/var/log/at_jk#

From what I can tell, there's no funny buisness as both the apache2, tomcat, and mod_jk logs show green; yet whenever I navigate to a jsp, it simply displays the javascript.

I'm unsure what the problem is exactly despite pouring over the logs and documentation for aid. I'm quite a greenhorn in the servelet world.

Answer two, as too many edits are happening. This is my working setup:-

mod-jk.conf:-

JkWorkersFile /etc/libapache2-mod-jk/workers.properties
JkLogFile /var/log/apache2/mod_jk.log
JkLogLevel info
JkMount /portal worker1
JkMount /portal/* worker1

in sites-enabled:-

<VirtualHost _default_:443>
    JkMountCopy On
    blah
    blah
</VirtualHost>

worker.properties (Usually it goes through the loadbalancer, but simplified here):-

worker.list=worker1

worker.worker1.port=9009
worker.worker1.host=host_name
worker.worker1.type=ajp13

tomcat server.xml:-

 <?xml version='1.0' encoding='utf-8'?>
<Server port="9005" shutdown="SHUTDOWN">

  <!-- cut -->

  <Service name="Catalina">
    <Connector port="9080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="9443" />

    <Connector port="9443" protocol="HTTP/1.1" SSLEnabled="true"
               keystoreFile="<path_to_keystore>.ks"
               kestorePass="<password for keystore>"
               maxThreads="200" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS" />

    <Connector port="9009" protocol="AJP/1.3" redirectPort="9443" />

    <Engine name="Catalina" defaultHost="localhost" jvmRoute="worker1">
      <Host name="localhost"  appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">    
      </Host>
    </Engine>
  </Service>
</Server>

So Tomcat is listening for http on 9080, https on 9443 and ajp on 9009.

Apache is listening on the https port 443. Anything that get's sent to the /portal context on that server is being sent through to mod_jk worker1 which is being forwarded onto tomcat through ajp.

Hope this helps!

My guess is that the server.xml in tomcat is not using the CoyoteConnector for port 9089, which is what talks the ajp protocol. I suspect that you have it talking http over that, and that if you hit http://server:9089/ it will load.

You'll want to have workers.properties use the CoyoteConnector port.

Connecting tomcat6 to apache2

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