Re: GWT Application gets “404 The requested resource is not available”.

Hi Jen,

I have done what you mentioned as well. Here is the content of /opt/tomcat/conf/server.xml 

<?xml version="1.0" encoding="UTF-8"?>
<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.tomee.catalina.ServerListener" />
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

  <GlobalNamingResources>
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>
  <Service name="Catalina">
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" xpoweredBy="false" server="Apache TomEE" />

   <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
   <Engine name="Catalina" defaultHost="localhost">
   <Realm className="org.apache.catalina.realm.LockOutRealm">
   <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
   </Realm>

      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log" suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />

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

Here is the content of "/etc/libapache2-mod-jk/workers.properties".

workers.tomcat_home=/opt/tomcat  workers.java_home=/usr/lib/jvm/java-8-oracle/jre  ps=/  worker.list=ajp13_worker  worker.ajp13_worker.port=8009  worker.ajp13_worker.host=localhost  worker.ajp13_worker.type=ajp13  worker.ajp13_worker.lbfactor=1  worker.loadbalancer.type=lb  worker.loadbalancer.balance_workers=ajp13_worker

I found some article online mentioned that I need to create symbolic link for GWT application. I can't figure out if it is true or not, though. It said I need to add something like below to 
SSL vhost configuration file.

      DocumentRoot "/opt/tomcat/webapps/Index"          Alias /Index "/opt/tomcat/webapps/Index"        <Directory "/opt/tomcat/webapps/Index">           Options Indexes FollowSymLinks           AllowOverride NONE           Order allow,deny           Allow from all        </Directory>          <Location "/Index/WEB-INF/">           AllowOverride None           Deny from all        </Location>          JKMountCopy On        JKMount /* ajp13_worker

On Monday, August 28, 2017 at 1:56:22 AM UTC-7, Jens wrote:

Thank you so much for your reply. However, I heard that mod_proxy is slower that Mod JK, so I made a switch just a little while ago :)

Oh sorry, somehow missed you are using mod_jk. Never really used it but then I guess you are missing some configuration needed on your production system.

Maybe the statement here does not take port 8080 into consideration ? -> "DocumentRoot "/opt/tomcat/webapps/Index"
Maybe I should try get rid of this same line within http vhost config file?

I think you should have a workers.properties file which is used to tell apache / mod_jk how to access the worker you have named "ajp13_worker". It should have host and port config values. But I guess if these values would be wrong you would get a HTTP 5xx status code and not a 4xx one.

Maybe change mod_jk logging to debug to get more information.

-- J.

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