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From d...@lexmark.com
Subject Separate xml context snippet for web app causes it to be loaded twice
Date Tue, 30 Sep 2003 19:49:17 GMT

Hi,

We have a web app that requires a special classloader.  We therefore placed a separate xml
file in the webapps directory, and placed inside it an xml
snippet containing the context for the webapp:

<Context path="/Kiosk" docBase="Kiosk">
  <Loader className="com.lexmark.catalina.loader.WebappLoader"/>
</Context>

as per instructions specified here:  http://jakarta.apache.org/tomcat/tomcat-4.1-doc/config/host.html#Automatic%20Application%20Deployment

Unfortunately this seems to cause the webapp ("Kiosk") to be deployed twice.

Can anyone explain why this is happening, please?  (contents of localhost.log and tomcat's
server.xml is below).

many thanks,

David


localhost.log:
2003-09-30 13:37:47 HostConfig[localhost]: Deploying configuration descriptor Kiosk.xml
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploying class repositories to work directory C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\work\Standalone\localhost\Kiosk
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy class files /WEB-INF/classes to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\classes
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/commons-beanutils.jar to
C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\commons-beanutils.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/commons-digester.jar to
C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\commons-digester.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/commons-logging.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\commons-logging.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/crimson.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\crimson.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/jaxp.jar to C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\jaxp.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/jzlib.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\jzlib.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/kiosk.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\kiosk.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/log4j-1.2.5.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\log4j-1.2.5.jar
2003-09-30 13:37:48 WebappLoader[/Kiosk]: Deploy JAR /WEB-INF/lib/struts.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Kiosk\WEB-INF\lib\struts.jar
2003-09-30 13:37:49 StandardManager[/Kiosk]: Seeding random number generator class java.security.SecureRandom
2003-09-30 13:37:50 StandardManager[/Kiosk]: Seeding of random number generator has been completed
2003-09-30 13:37:50 StandardWrapper[/Kiosk:default]: Loading container servlet default
2003-09-30 13:37:50 StandardWrapper[/Kiosk:invoker]: Loading container servlet invoker
2003-09-30 13:37:54 [2003-09-30 13:37:51,562] [INFO] PropertyMessageResources - () - Initializing,
config='org.apache.struts.util.LocalStrings',
returnNull=true
[2003-09-30 13:37:51,562] [INFO] PropertyMessageResources - () - Initializing, config='org.apache.struts.action.ActionResources',
returnNull=true
[2003-09-30 13:37:53,465] [INFO] PropertyMessageResources - () - Initializing, config='prop.Label',
returnNull=true

2003-09-30 13:37:56 HostConfig[localhost]: Deploying web application directory Common
2003-09-30 13:37:56 StandardHost[localhost]: Installing web application at context path /Common
from URL file:C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\Common
2003-09-30 13:37:56 WebappLoader[/Common]: Deploying class repositories to work directory
C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\work\Standalone\localhost\Common
2003-09-30 13:37:57 ContextConfig[/Common]: Missing application web.xml, using defaults only
2003-09-30 13:37:57 StandardManager[/Common]: Seeding random number generator class java.security.SecureRandom
2003-09-30 13:37:57 StandardManager[/Common]: Seeding of random number generator has been
completed
2003-09-30 13:37:57 StandardWrapper[/Common:default]: Loading container servlet default
2003-09-30 13:37:57 StandardWrapper[/Common:invoker]: Loading container servlet invoker
2003-09-30 13:37:57 HostConfig[localhost]: Deploying web application directory kiosk
2003-09-30 13:37:57 StandardHost[localhost]: Installing web application at context path /kiosk
from URL file:C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploying class repositories to work directory C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\work\Standalone\localhost\kiosk
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy class files /WEB-INF/classes to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\classes
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/commons-beanutils.jar to
C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\commons-beanutils.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/commons-digester.jar to
C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\commons-digester.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/commons-logging.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\commons-logging.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/crimson.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\crimson.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/jaxp.jar to C:\Program Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\jaxp.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/jzlib.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\jzlib.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/kiosk.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\kiosk.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/log4j-1.2.5.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\log4j-1.2.5.jar
2003-09-30 13:37:57 WebappLoader[/kiosk]: Deploy JAR /WEB-INF/lib/struts.jar to C:\Program
Files\Lexmark\Document
Solutions\Services\tomcat\webapps\kiosk\WEB-INF\lib\struts.jar
2003-09-30 13:37:59 StandardManager[/kiosk]: Seeding random number generator class java.security.SecureRandom
2003-09-30 13:37:59 StandardManager[/kiosk]: Seeding of random number generator has been completed
2003-09-30 13:37:59 StandardWrapper[/kiosk:default]: Loading container servlet default
2003-09-30 13:37:59 StandardWrapper[/kiosk:invoker]: Loading container servlet invoker
2003-09-30 13:38:03 [2003-09-30 13:37:59,844] [INFO] PropertyMessageResources - () - Initializing,
config='org.apache.struts.util.LocalStrings',
returnNull=true
[2003-09-30 13:37:59,844] [INFO] PropertyMessageResources - () - Initializing, config='org.apache.struts.action.ActionResources',
returnNull=true
[2003-09-30 13:38:02,137] [INFO] PropertyMessageResources - () - Initializing, config='prop.Label',
returnNull=true

server.xml:
<!-- Alternate Example-less Configuration File -->
<!-- Note that component elements are nested corresponding to their
     parent-child relationships with each other -->

<!-- A "Server" is a singleton element that represents the entire JVM,
     which may contain one or more "Service" instances.  The Server
     listens for a shutdown command on the indicated port.

     Note:  A "Server" is not itself a "Container", so you may not
     define subcomponents such as "Valves" or "Loggers" at this level.
 -->

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

  <!-- A listener that will automatically add the Document Solutions server install path
       to the process path. -->

  <Listener className="com.lexmark.catalina.listener.SystemPathBuilder" debug="0"/>

  <!-- A "Service" is a collection of one or more "Connectors" that share
       a single "Container" (and therefore the web applications visible
       within that Container).  Normally, that Container is an "Engine",
       but this is not required.

       Note:  A "Service" is not itself a "Container", so you may not
       define subcomponents such as "Valves" or "Loggers" at this level.
   -->

  <!-- Define the Tomcat Stand-Alone Service -->
  <Service name="Tomcat-Standalone">

    <!-- A "Connector" represents an endpoint by which requests are received
         and responses are returned.  Each Connector passes requests on to the
         associated "Container" (normally an Engine) for processing.

         By default, a non-SSL HTTP/1.1 Connector is established on port 8080.
         You can also enable an SSL HTTP/1.1 Connector on port 8443 by
         following the instructions below and uncommenting the second Connector
         entry.  SSL support requires the following steps (see the SSL Config
         HOWTO in the Tomcat 4.0 documentation bundle for more detailed
         instructions):
         * Download and install JSSE 1.0.2 or later, and put the JAR files
           into "$JAVA_HOME/jre/lib/ext".
         * Execute:
             %JAVA_HOME%\bin\keytool -genkey -alias tomcat -keyalg RSA (Windows)
             $JAVA_HOME/bin/keytool -genkey -alias tomcat -keyalg RSA  (Unix)
           with a password value of "changeit" for both the certificate and
           the keystore itself.

         By default, DNS lookups are enabled when a web application calls
         request.getRemoteHost().  This can have an adverse impact on
         performance, so you can disable it by setting the
         "enableLookups" attribute to "false".  When DNS lookups are disabled,
         request.getRemoteHost() will return the String version of the
         IP address of the remote client.
    -->

    <!-- Define a non-SSL HTTP/1.1 Connector on port 8080 -->
    <Connector className="org.apache.catalina.connector.http.HttpConnector"
               port="8080" minProcessors="5" maxProcessors="75"
               enableLookups="true" redirectPort="8443"
               acceptCount="10" debug="0" connectionTimeout="60000"/>
    <!-- Note : To disable connection timeouts, set connectionTimeout value
     to -1 -->

    <!-- Define an SSL HTTP/1.1 Connector on port 8443 -->
    <!--
    <Connector className="org.apache.catalina.connector.http.HttpConnector"
               port="8443" minProcessors="5" maxProcessors="75"
               enableLookups="true"
             acceptCount="10" debug="0" scheme="https" secure="true">
      <Factory className="org.apache.catalina.net.SSLServerSocketFactory"
               clientAuth="false" protocol="TLS"/>
    </Connector>
    -->

    <!-- Define an AJP 1.3 Connector on port 8009 -->
    <!--
    <Connector className="org.apache.ajp.tomcat4.Ajp13Connector"
               port="8009" minProcessors="5" maxProcessors="75"
               acceptCount="10" debug="0"/>
    -->

    <!-- Define a Proxied HTTP/1.1 Connector on port 8081 -->
    <!-- See proxy documentation for more information about using this. -->
    <!--
    <Connector className="org.apache.catalina.connector.http.HttpConnector"
               port="8081" minProcessors="5" maxProcessors="75"
               enableLookups="true"
               acceptCount="10" debug="0" connectionTimeout="60000"
               proxyPort="80"/>
    -->

    <!-- Define a non-SSL HTTP/1.0 Test Connector on port 8082 -->
    <!--
    <Connector className="org.apache.catalina.connector.http10.HttpConnector"
               port="8082" minProcessors="5" maxProcessors="75"
               enableLookups="true" redirectPort="8443"
               acceptCount="10" debug="0"/>
    -->

    <!-- An Engine represents the entry point (within Catalina) that processes
         every request.  The Engine implementation for Tomcat stand alone
         analyzes the HTTP headers included with the request, and passes them
         on to the appropriate Host (virtual host). -->

    <!-- Define the top level container in our container hierarchy -->
    <Engine name="Standalone" defaultHost="localhost" debug="0">

      <!-- The request dumper valve dumps useful debugging information about
           the request headers and cookies that were received, and the response
           headers and cookies that were sent, for all requests received by
           this instance of Tomcat.  If you care only about requests to a
           particular virtual host, or a particular application, nest this
           element inside the corresponding <Host> or <Context> entry instead.

           For a similar mechanism that is portable to all Servlet 2.3
           containers, check out the "RequestDumperFilter" Filter in the
           example application (the source for this filter may be found in
           "$CATALINA_HOME/webapps/examples/WEB-INF/classes/filters").

           Request dumping is disabled by default.  Uncomment the following
           element to enable it. -->
      <!--
      <Valve className="org.apache.catalina.valves.RequestDumperValve"/>
      -->

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

      <!-- Because this Realm is here, an instance will be shared globally -->

      <Realm className="org.apache.catalina.realm.MemoryRealm" />

      <!-- Replace the above Realm with one of the following to get a Realm
           stored in a database and accessed via JDBC -->

      <!--
      <Realm  className="org.apache.catalina.realm.JDBCRealm" debug="99"
             driverName="org.gjt.mm.mysql.Driver"
          connectionURL="jdbc:mysql://localhost/authority"
         connectionName="test" connectionPassword="test"
              userTable="users" userNameCol="user_name" userCredCol="user_pass"
          userRoleTable="user_roles" roleNameCol="role_name" />
      -->

      <!--
      <Realm  className="org.apache.catalina.realm.JDBCRealm" debug="99"
             driverName="oracle.jdbc.driver.OracleDriver"
          connectionURL="jdbc:oracle:thin:@ntserver:1521:ORCL"
         connectionName="scott" connectionPassword="tiger"
              userTable="users" userNameCol="user_name" userCredCol="user_pass"
          userRoleTable="user_roles" roleNameCol="role_name" />
      -->

      <!--
      <Realm  className="org.apache.catalina.realm.JDBCRealm" debug="99"
             driverName="sun.jdbc.odbc.JdbcOdbcDriver"
          connectionURL="jdbc:odbc:CATALINA"
              userTable="users" userNameCol="user_name" userCredCol="user_pass"
          userRoleTable="user_roles" roleNameCol="role_name" />
      -->

      <!-- Define the default virtual host -->
      <Host name="localhost" debug="0" appBase="webapps" unpackWARs="true">

        <!-- Normally, users must authenticate themselves to each web app
             individually.  Uncomment the following entry if you would like
             a user to be authenticated the first time they encounter a
             resource protected by a security constraint, and then have that
             user identity maintained across *all* web applications contained
             in this virtual host. -->
        <!--
        <Valve className="org.apache.catalina.authenticator.SingleSignOn"
                   debug="0"/>
        -->

        <!-- Access log processes all requests for this virtual host.  By
             default, log files are created in the "logs" directory relative to
             $CATALINA_HOME.  If you wish, you can specify a different
             directory with the "directory" attribute.  Specify either a relative
             (to $CATALINA_HOME) or absolute path to the desired directory.
        -->
        <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs"  prefix="localhost_access_log." suffix=".txt"
                 pattern="common"/>

        <!-- Logger shared by all Contexts related to this virtual host.  By
             default (when using FileLogger), log files are created in the "logs"
             directory relative to $CATALINA_HOME.  If you wish, you can specify
             a different directory with the "directory" attribute.  Specify either a
             relative (to $CATALINA_HOME) or absolute path to the desired
             directory.-->
        <Logger className="org.apache.catalina.logger.FileLogger"
                 directory="logs"  prefix="localhost_log." suffix=".txt"
              timestamp="true"/>

        <!-- Define properties for each web application.  This is only needed
             if you want to set non-default properties, or have web application
             document roots in places other than the virtual host's appBase
             directory.  -->

        <!-- Tomcat Root Context -->
        <!--
          <Context path="" docBase="ROOT" debug="0"/>
        -->

      </Host>

    </Engine>

  </Service>

  <!-- The MOD_WEBAPP connector is used to connect Apache 1.3 with Tomcat 4.0
       as its servlet container. Please read the README.txt file coming with
       the WebApp Module distribution on how to build it.
       (Or check out the "jakarta-tomcat-connectors/webapp" CVS repository)

       To configure the Apache side, you must ensure that you have the
       "ServerName" and "Port" directives defined in "httpd.conf".  Then,
       lines like these to the bottom of your "httpd.conf" file:

         LoadModule webapp_module libexec/mod_webapp.so
         WebAppConnection warpConnection warp localhost:8008
         WebAppDeploy examples warpConnection /examples/

       The next time you restart Apache (after restarting Tomcat, if needed)
       the connection will be established, and all applications you make
       visible via "WebAppDeploy" directives can be accessed through Apache.
  -->

  <!-- Define an Apache-Connector Service -->
  <Service name="Tomcat-Apache">

    <Connector className="org.apache.catalina.connector.warp.WarpConnector"
     port="8008" minProcessors="5" maxProcessors="75"
     enableLookups="true"
     acceptCount="10" debug="0"/>

    <!-- Replace "localhost" with what your Apache "ServerName" is set to -->
    <Engine className="org.apache.catalina.connector.warp.WarpEngine"
     name="Apache" defaultHost="localhost" debug="0" appBase="webapps">

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

      <!-- Because this Realm is here, an instance will be shared globally -->
      <Realm className="org.apache.catalina.realm.MemoryRealm" />

    </Engine>

  </Service>

</Server>



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