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From ssmith <ssm...@agristats.com>
Subject Re: Tomcat 5.5.28 Class loading issue
Date Tue, 26 Jan 2010 18:12:00 GMT

Sorry, new to Nabble.

I am defining a servlet filter.

I tried to use the existing wars built for Tomcat 5.0.28, but they would not
deploy at all.
So, yes, I rebuilt them for Tomcat 5.5.28.
 
Yes, I have a servlet-api.jar in the WEB-INF/lib/ and tomcat/common/lib
directories.  Eclipse (really MyEclipse) automatically builds the war with
the jar, based on the project build path.  I removed the servlet-api.jar
from the WEB-INF/lib and started the server again---got the following error:

SEVERE: Exception starting filter sitemesh
java.lang.NoClassDefFoundError: javax/servlet/Filter
	at java.lang.ClassLoader.defineClass1(Native Method)

With the servlet-api.jar in WEB-INF/lib/ I get the following error--which is
my original error that I posted:
  
SEVERE: Exception starting filter sitemesh
java.lang.ClassCastException:
com.opensymphony.module.sitemesh.filter.PageFilter

I listed jasper.jar as being an issue.  It was naming-*.jars packaged with
Tomcat 5.5.28 that was an issue.  Also, I had a references to older jars
(such as jstl.jar) in my project--Tomcat 5.5.28 uses newer jars for several
things.   

Yes, the class definitions in the web.xml are correct....as they are when it
runs on Tomcat 5.0.28.

I orginally stated that the WikiUrlSessionIdFilter was a direct plug in
class.  That was not correct--it is referenced and used within our
agriStatsUtilities.jar. The sitemesh class is a direct plug in class. 
Following is the web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee  
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <filter>
     <filter-name>wikiUrlSessionIdFilter</filter-name>
    
<filter-class>com.agristats.agriStatsUtilities.util.WikiUrlSessionIdFilter</filter-class>
  </filter>
  <filter-mapping>
     <filter-name>wikiUrlSessionIdFilter</filter-name>
     <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
     <filter-name>wikiUrlSessionIdFilter</filter-name>
     <url-pattern>*.do</url-pattern>
  </filter-mapping>
  <filter-mapping>
     <filter-name>wikiUrlSessionIdFilter</filter-name>
     <url-pattern>/employeeUI/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
     <filter-name>wikiUrlSessionIdFilter</filter-name>
     <url-pattern>/partyRoleUI/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
     <filter-name>wikiUrlSessionIdFilter</filter-name>
     <url-pattern>/agriStatsMainUI/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
     <filter-name>wikiUrlSessionIdFilter</filter-name>
     <url-pattern>/agriStatsStandardLayoutUI/*</url-pattern>
  </filter-mapping>
  <filter>
    <filter-name>sitemesh</filter-name>
   
<filter-class>com.opensymphony.module.sitemesh.filter.PageFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>sitemesh</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet>
    <servlet-name>action_tmp</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <servlet>
    <servlet-name>JUnitEETestServlet</servlet-name>
    <servlet-class>org.junitee.servlet.JUnitEEServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>JUnitEETestServlet</servlet-name>
    <url-pattern>/TestServlet/*</url-pattern>
  </servlet-mapping>
  <session-config>
    <session-timeout>60</session-timeout>
  </session-config>
</web-app>


And below is the content of the server.xml---pretty much standard as
provided by Tomcat, except for the definition for the email resource.  I
also modified the standard context.xml to include a DefaultContext for our
email server (I did not provide contents of context.xml--but can if you need
it).  These modifications existed in the xml files for Tomcat 5.0.28.  
  
<?xml version="1.0" encoding="UTF-8"?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<!-- Example Server 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">

  <!-- Comment these entries out to disable JMX MBeans support used for the 
       administration web application -->
  <Listener className="org.apache.catalina.core.AprLifecycleListener" />
  <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
/>
  <Listener
className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener
className="org.apache.catalina.storeconfig.StoreConfigLifecycleListener"/>

  <!-- Global JNDI resources -->
  <GlobalNamingResources>

    <!-- Test entry for demonstration purposes -->
    <Environment name="simpleValue" type="java.lang.Integer" value="30"/>

     <!-- 5.5 email factory for JavaMail -->
     <Resource name="mail/Session" auth="Container"
         type="javax.mail.Session"
         description="JavaMail email session"
         mail.smtp.host="as1.agristats.local" />
      
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users -->
    <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>

  <!-- 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="Catalina">

    <!-- 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 5 documentation bundle for more detailed
         instructions):
         * If your JDK version 1.3 or prior, 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 port="8080" maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" />
    <!-- Note : To disable connection timeouts, set connectionTimeout value
     to 0 -->
	
	<!-- Note : To use gzip compression you could set the following properties
:
	
			   compression="on" 
			   compressionMinSize="2048" 
			   noCompressionUserAgents="gozilla, traviata" 
			   compressableMimeType="text/html,text/xml"
	-->

    <!-- Define a SSL HTTP/1.1 Connector on port 8443 -->
    <!--
    <Connector port="8443" maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" disableUploadTimeout="true"
               acceptCount="100" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS" />
    -->

    <!-- Define an AJP 1.3 Connector on port 8009 -->
    <Connector port="8009" 
               enableLookups="false" redirectPort="8443" protocol="AJP/1.3"
/>

    <!-- Define a Proxied HTTP/1.1 Connector on port 8082 -->
    <!-- See proxy documentation for more information about using this. -->
    <!--
    <Connector port="8082" 
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" acceptCount="100"
connectionTimeout="20000"
               proxyPort="80" disableUploadTimeout="true" />
    -->

    <!-- 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). -->

    <!-- You should set jvmRoute to support load-balancing via AJP ie :
    <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">         
    --> 
         
    <!-- Define the top level container in our container hierarchy -->
    <Engine name="Catalina" defaultHost="localhost">

      <!-- 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 2.4
           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").

           Note that this Valve uses the platform's default character
encoding.
           This may cause problems for developers in another encoding, e.g.
           UTF-8.  Use the RequestDumperFilter instead.

           Also note that enabling this Valve will write a ton of stuff to
your
           logs.  They are likely to grow quite large.  This extensive log
writing
           will definitely slow down your server.

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

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

      <!-- This Realm uses the UserDatabase configured in the global JNDI
           resources under the key "UserDatabase".  Any edits
           that are performed against this UserDatabase are immediately
           available for use by the Realm.  -->
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
             resourceName="UserDatabase"/>

      <!-- Comment out the old realm but leave here for now in case we
           need to go back quickly -->
      <!--
      <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"
             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"
             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"
             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
           Note: XML Schema validation will not work with Xerces 2.2.
       -->
      <Host name="localhost" appBase="webapps"
       unpackWARs="true" autoDeploy="true"
       xmlValidation="false" xmlNamespaceAware="false">

        <!-- Defines a cluster for this node,
             By defining this element, means that every manager will be
changed.
             So when running a cluster, only make sure that you have webapps
in there
             that need to be clustered and remove the other ones.
             A cluster has the following parameters:

             className = the fully qualified name of the cluster class

             clusterName = a descriptive name for your cluster, can be
anything

             mcastAddr = the multicast address, has to be the same for all
the nodes

             mcastPort = the multicast port, has to be the same for all the
nodes
             
             mcastBindAddress = bind the multicast socket to a specific
address
             
             mcastTTL = the multicast TTL if you want to limit your
broadcast
             
             mcastSoTimeout = the multicast readtimeout 

             mcastFrequency = the number of milliseconds in between sending
a "I'm alive" heartbeat

             mcastDropTime = the number a milliseconds before a node is
considered "dead" if no heartbeat is received

             tcpThreadCount = the number of threads to handle incoming
replication requests, optimal would be the same amount of threads as nodes 

             tcpListenAddress = the listen address (bind address) for TCP
cluster request on this host, 
                                in case of multiple ethernet cards.
                                auto means that address becomes
                                InetAddress.getLocalHost().getHostAddress()

             tcpListenPort = the tcp listen port

             tcpSelectorTimeout = the timeout (ms) for the Selector.select()
method in case the OS
                                  has a wakup bug in java.nio. Set to 0 for
no timeout

             printToScreen = true means that managers will also print to
std.out

             expireSessionsOnShutdown = true means that 

             useDirtyFlag = true means that we only replicate a session
after setAttribute,removeAttribute has been called.
                            false means to replicate the session after each
request.
                            false means that replication would work for the
following piece of code: (only for SimpleTcpReplicationManager)
                            <%
                            HashMap map =
(HashMap)session.getAttribute("map");
                            map.put("key","value");
                            %>
             replicationMode = can be either 'pooled', 'synchronous' or
'asynchronous'.
                               * Pooled means that the replication happens
using several sockets in a synchronous way. Ie, the data gets replicated,
then the request return. This is the same as the 'synchronous' setting
except it uses a pool of sockets, hence it is multithreaded. This is the
fastest and safest configuration. To use this, also increase the nr of tcp
threads that you have dealing with replication.
                               * Synchronous means that the thread that
executes the request, is also the
                               thread the replicates the data to the other
nodes, and will not return until all
                               nodes have received the information.
                               * Asynchronous means that there is a specific
'sender' thread for each cluster node,
                               so the request thread will queue the
replication request into a "smart" queue,
                               and then return to the client.
                               The "smart" queue is a queue where when a
session is added to the queue, and the same session
                               already exists in the queue from a previous
request, that session will be replaced
                               in the queue instead of replicating two
requests. This almost never happens, unless there is a 
                               large network delay.
        -->             
        <!--
            When configuring for clustering, you also add in a valve to
catch all the requests
            coming in, at the end of the request, the session may or may not
be replicated.
            A session is replicated if and only if all the conditions are
met:
            1. useDirtyFlag is true or setAttribute or removeAttribute has
been called AND
            2. a session exists (has been created)
            3. the request is not trapped by the "filter" attribute

            The filter attribute is to filter out requests that could not
modify the session,
            hence we don't replicate the session after the end of this
request.
            The filter is negative, ie, anything you put in the filter, you
mean to filter out,
            ie, no replication will be done on requests that match one of
the filters.
            The filter attribute is delimited by ;, so you can't escape out
; even if you wanted to.

            filter=".*\.gif;.*\.js;" means that we will not replicate the
session after requests with the URI
            ending with .gif and .js are intercepted.
            
            The deployer element can be used to deploy apps cluster wide.
            Currently the deployment only deploys/undeploys to working
members in the cluster
            so no WARs are copied upons startup of a broken node.
            The deployer watches a directory (watchDir) for WAR files when
watchEnabled="true"
            When a new war file is added the war gets deployed to the local
instance,
            and then deployed to the other instances in the cluster.
            When a war file is deleted from the watchDir the war is
undeployed locally 
            and cluster wide
        -->
        
        <!--
        <Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
                
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
                 expireSessionsOnShutdown="false"
                 useDirtyFlag="true"
                 notifyListenersOnReplication="true">

            <Membership 
                className="org.apache.catalina.cluster.mcast.McastService"
                mcastAddr="228.0.0.4"
                mcastPort="45564"
                mcastFrequency="500"
                mcastDropTime="3000"/>

            <Receiver 
               
className="org.apache.catalina.cluster.tcp.ReplicationListener"
                tcpListenAddress="auto"
                tcpListenPort="4001"
                tcpSelectorTimeout="100"
                tcpThreadCount="6"/>

            <Sender
               
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
                replicationMode="pooled"
                ackTimeout="15000"
                waitForAck="true"/>

            <Valve
className="org.apache.catalina.cluster.tcp.ReplicationValve"
                  
filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
                   
            <Deployer
className="org.apache.catalina.cluster.deploy.FarmWarDeployer"
                      tempDir="/tmp/war-temp/"
                      deployDir="/tmp/war-deploy/"
                      watchDir="/tmp/war-listen/"
                      watchEnabled="false"/>
                      
            <ClusterListener
className="org.apache.catalina.cluster.session.ClusterSessionListener"/>
        </Cluster>
        -->        



        <!-- 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" />
        -->

        <!-- 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" resolveHosts="false"/>
        -->
		 
        <!-- 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.
             This access log implementation is optimized for maximum
performance,
             but is hardcoded to support only the "common" and "combined"
patterns.
        -->
        <!--
        <Valve
className="org.apache.catalina.valves.FastCommonAccessLogValve"
                 directory="logs"  prefix="localhost_access_log."
suffix=".txt"
                 pattern="common" resolveHosts="false"/>
        -->
	
      </Host>

    </Engine>

  </Service>

</Server>

Thanks for quick reply, Smith

-- 
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