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From dirk ooms <d...@onesparrow.com>
Subject Re: multiple instances of load-on-startup classes
Date Tue, 27 Jun 2006 13:04:28 GMT
i had something similar and the reason then was that i had duplicate context 
definition files. it seems that your context definition is not in server.xml, 
so you might check whether there are duplicate context files somewhere in 
tomcat/conf/...

dirk

On Tuesday 27 June 2006 13:43, Mark Benussi wrote:
> We have a webapp running within Tomcat 5.0.28 on Linux.
> The message log indicates that any <load-on-startup> classes are loaded
> twice. Also, any singleton objects created by these load-on-startup classes
> are created twice. This has been confirmed by stepping through the code via
> a debugger.
>
> >From what I have gathered from web search it looks like the webapp is
> > being
>
> loaded twice - each instance of the webapp uses a seperate class-loader
> which accounts for seeing multiple instances of singleton objects.
>
> Can anyone shed any light on what may is going on here. Is the webapp being
> loaded twice? Is there a problem with Tomcat's server.xml?
>
> I have included the application log, server.xml and web.xml below:
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Applic
>ation Log
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
> DEBUG 10:37:29,411 CpmDigester:CpmDigester(...) - Config file name =
> '/usr/local/home/paphdv14/.cpm.xml'
> DEBUG 10:37:29,527 CpmDigester:loadResults() - About to parse config file
> DEBUG 10:37:29,682 CpmDigester:loadResults() - config file parsed
> DEBUG 10:37:30,279 Information on the connection pool 'WEBCP'...
> DEBUG 10:37:30,279   Number of active connections = 1
> DEBUG 10:37:30,279   Number of idle connections = 0
> INFO  10:37:31,369 Loading validation rules file from
> '/WEB-INF/validator-rules.xml'
> INFO  10:37:31,375 Loading validation rules file from
> '/WEB-INF/validation-web.xml'
> INFO  10:37:31,705 Tiles definition factory loaded for module '/web'.
> DEBUG 10:37:31,731 WebLoginInitialiserPlugIn:init() - START
> INFO  10:37:31,851 Tiles definition factory loaded for module '/imm'.
> INFO  10:37:31,851 Loading validation rules file from
> '/WEB-INF/validator-rules.xml'
> INFO  10:37:31,851 Loading validation rules file from
> '/WEB-INF/validation-imm.xml'
> INFO  10:37:32,039 WebApplicationInitialisation:init(...) - Web application
> initialisation starting...
> INFO  10:37:32,039 WebApplicationInitialisation:init(...) - Initialising
> context parameters.
> DEBUG 10:37:32,039 WebApplicationInitialisation:init(...) - param =
> ./web/mainPage.do
>
> DEBUG 10:37:33,114 CpmDigester:CpmDigester(...) - Config file name =
> '/usr/local/home/paphdv14/.cpm.xml'
> DEBUG 10:37:33,154 CpmDigester:loadResults() - About to parse config file
> DEBUG 10:37:33,279 CpmDigester:loadResults() - config file parsed
> DEBUG 10:37:33,816 Information on the connection pool 'WEBCP'...
> DEBUG 10:37:33,817   Number of active connections = 1
> DEBUG 10:37:33,817   Number of idle connections = 0
> INFO  10:37:34,473 Loading validation rules file from
> '/WEB-INF/validator-rules.xml'
> INFO  10:37:34,475 Loading validation rules file from
> '/WEB-INF/validation-web.xml'
> INFO  10:37:34,854 Tiles definition factory loaded for module '/web'.
> DEBUG 10:37:34,866 WebLoginInitialiserPlugIn:init() - START
> INFO  10:37:34,918 Tiles definition factory loaded for module '/imm'.
> INFO  10:37:34,918 Loading validation rules file from
> '/WEB-INF/validator-rules.xml'
> INFO  10:37:34,918 Loading validation rules file from
> '/WEB-INF/validation-imm.xml'
> INFO  10:37:34,982 WebApplicationInitialisation:init(...) - Web application
> initialisation starting...
> INFO  10:37:34,982 WebApplicationInitialisation:init(...) - Initialising
> context parameters.
> DEBUG 10:37:34,982 WebApplicationInitialisation:init(...) - param =
> ./web/mainPage.do
>
> &#65279;<?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"
>          xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
> http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
>          version="2.4">
> <description></description>
> <filter>
>   <filter-name>SessionFilter</filter-name>
>   <filter-class>uk.co.etc.web.session.filter.SessionFilter</filter-class>
> </filter>
> <filter-mapping>
>   <filter-name>SessionFilter</filter-name>
>   <url-pattern>*.do</url-pattern>
> </filter-mapping>
> <filter-mapping>
>   <filter-name>SessionFilter</filter-name>
>   <url-pattern>*.jsp</url-pattern>
> </filter-mapping>
> <filter-mapping>
>   <filter-name>SessionFilter</filter-name>
>   <url-pattern>/servlet/*</url-pattern>
> </filter-mapping>
> <servlet>
>   <servlet-name>web-app-init</servlet-name>
>
> <servlet-class>uk.co.etc.web.session.init.WebApplicationInitialisation</ser
>vlet-class> <init-param>
>    <param-name>mainPageUri</param-name>
>    <param-value>/web/mainPage.do</param-value>
>   </init-param>
> ...
>   <load-on-startup>0</load-on-startup>
> </servlet>
> <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-main.xml</param-value>
>   </init-param>
>   <init-param>
>    <param-name>config/web</param-name>
>    <param-value>/WEB-INF/struts-config-web.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>2</param-value>
>   </init-param>
>   <load-on-startup>2</load-on-startup>
> </servlet>
> <servlet-mapping>
>   <servlet-name>action</servlet-name>
>   <url-pattern>*.do</url-pattern>
> </servlet-mapping>
> <welcome-file-list>
>   <welcome-file>/index.jsp</welcome-file>
> </welcome-file-list>
>
>
> </web-app>
>
> <Server port="12106" shutdown="SHUTDOWN" debug="0">
>
>   <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
>             debug="0"/>
>   <Listener
> className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
>             debug="0"/>
>
>   <!-- Define the Tomcat Stand-Alone Service -->
>   <Service name="Catalina">
>
>     <!-- Define a non-SSL Coyote HTTP/1.1 Connector on port 8080 -->
>     <Connector port="12180"
>                maxThreads="100" minSpareThreads="5" maxSpareThreads="10"
>                enableLookups="false" redirectPort="8443" acceptCount="100"
>                debug="0" connectionTimeout="20000"
>                disableUploadTimeout="true" />
>
>     <!-- Define a Coyote/JK2 AJP 1.3 Connector on port 8009 -->
>     <Connector port="12109"
>                enableLookups="false" redirectPort="8443" debug="0"
>                protocol="AJP/1.3" />
>
>
>     <!-- Define the top level container in our container hierarchy -->
>     <Engine name="Catalina" defaultHost="paphdv14" debug="0">
>       <!-- Global logger unless overridden at lower levels -->
>       <Logger className="org.apache.catalina.logger.FileLogger"
>               prefix="catalina_log." suffix=".txt"
>               timestamp="true"/>
>   <Host name="paphdv14" appBase="webapps">
>           <Logger className="org.apache.catalina.logger.FileLogger"
>                    directory="logs"  prefix="paphdv14." suffix=".log"
> timestamp="true"/>
>   </Host>
>     </Engine>
>   </Service>
> </Server>
>
>
>
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