You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@tomcat.apache.org by JavaJosh <jo...@yahoo.com> on 2002/03/19 22:07:40 UTC
Where's my fish? How do I go fishing? (Tomcat 4.0)
Hello,
Tomcat 4.0.3 is apparently not reloading a recompiled servlet. According
to the docs, this should be the default behavior.
Interestingly, it WILL load a new servlet.
I have 2 questions, of the "where's my fish" sort and of the "how do I
fish" sort.
Where's my fish: why isn't Tomcat reloading my changed servlet? I have
verified that the class file has changed by checking the timestamp, so
I'm pretty sure it's not a build problem.
How do I fish: what is a reasonable way to troubleshoot this problem?
While I would love to have a fish right now, I am perfectly willing to
learn how to fish and catch my own.
Some fishing I've already done:
1) tried restarting tomcat. Picks up the new class!
2) tried restarting the browser. No go.
3) examined the tomcat logs. Nothing interesting.
4) examined the servlet class file in the webapps dir. Yup, it sure
changed.
5) tried adding a second servlet. Tomcat picks it up!
6) tried changing the second servlet. No go.
I *suspect* that in the murky depths of this problem swims an enormous
caching flounder. Is its name Tomcat 4.0.3? Is it IE 5? Either way, I
want to hook it, filet it, and have it for dinner tonight.
Thanks for your help,
Josh Rehman
Here are some more facts for you:
Hardware: Dell Inspiron 7000 Laptop - P2-366 256M/10G
OS: MS Windows 2000 (NT5) Professional SP2 1024x768x64k
Java: Sun J2SE 1.3.1_01 - c:\java\jdk131
Tomcat: 4.0.3 - c:\java\jakarta-tomcat-4.0.3
%CATALINA_HOME%\conf\web.xml is stock
%CATALINA_HOME%\conf\server.xml is stock
Environment variables:
CATALINA_HOME=C:\java\jakarta-tomcat-4.0.3
JAVA_HOME=c:\java\jdk131_01
JIKES_HOME=c:\java\jikes114
ANT_HOME=c:\java\ant14
Project organization:
Deploy root: %CATALINA_HOME%\webapps\tomcat40
\WEB-INF\web.xml
\WEB-INF\classes\joshbrain\tomcat40\FirstServlet.class
\WEB-INF\classes\joshbrain\tomcat40\SecondServlet.class
Contents of web.xml:
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>Tomcat 4.0.3 Evaluation Application</display-name>
<description>
This is version 1.0 of a simple evaluation application
written by Josh Rehman (joshjava@yahoo.com).
</description>
<context-param>
<param-name>webmaster</param-name>
<param-value>joshjava@yahoo.com</param-value>
<description>
The EMAIL address of the administrator to whom questions
and comments about this application should be addressed.
</description>
</context-param>
<servlet>
<servlet-name>first</servlet-name>
<servlet-class>joshbrain.tomcat.FirstServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>second</servlet-name>
<servlet-class>joshbrain.tomcat.SecondServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>first</servlet-name>
<url-pattern>/first</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>second</servlet-name>
<url-pattern>/second</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>30</session-timeout> <!-- 30 minutes -->
</session-config>
</web-app>
Contents of FirstServlet.java (SecondServlet similar):
/*
* FirstServlet.java
*
* Created on March 18, 2002, 4:56 PM
*/
package joshbrain.tomcat;
import javax.servlet.*;
import javax.servlet.http.*;
/**
*
* @author Josh Rehman
* @version
*/
public class FirstServlet extends HttpServlet
{
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException
{
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<b>This is the string that will change!</b>");
out.println("</body>");
out.println("</html>");
out.close();
}
protected void doGet(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, java.io.IOException
{
processRequest(request, response);
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException
{
processRequest(request, response);
}
}
My ant build script:
<project name="Tomcat 4.0.3 Evaluation" default="compile" basedir=".">
<property file="build.properties"/>
<property file="${user.home}/build.properties"/>
<property name="app.name" value="tomcat40"/>
<property name="app.version" value="1.0"/>
<property name="build.home" value="build"/>
<!--<property name="catalina.home" value="../../../.."/> UPDATE THIS!
-->
<property name="deploy.home"
value="${catalina.home}/webapps/${app.name}"/>
<property name="dist.home" value="dist"/>
<property name="compile.debug" value="true"/>
<property name="compile.deprecation" value="false"/>
<property name="compile.optimize" value="true"/>
<path id="compile.classpath">
<pathelement location="${catalina.home}/common/classes"/>
<fileset dir="${catalina.home}/common/lib">
<include name="*.jar"/>
</fileset>
<pathelement location="${catalina.home}/classes"/>
<fileset dir="${catalina.home}/lib">
<include name="*.jar"/>
</fileset>
</path>
<target name="all" depends="clean,compile"
description="Clean build and dist, then compile"/>
<target name="clean"
description="Delete old build and dist directories">
<delete dir="${build.home}"/>
<delete dir="${dist.home}"/>
</target>
<target name="compile" depends="prepare"
description="Compile Java sources">
<!-- Compile Java classes as necessary -->
<mkdir dir="${build.home}/WEB-INF/classes"/>
<javac srcdir="src"
destdir="${build.home}/WEB-INF/classes"
debug="${compile.debug}"
deprecation="${compile.deprecation}"
optimize="${compile.optimize}">
<classpath refid="compile.classpath"/>
</javac>
<!-- Copy associated resource files -->
<copy todir="${build.home}/WEB-INF/classes">
<fileset dir="src" includes="**/*.properties"/>
</copy>
</target>
<target name="deploy" depends="compile"
description="Deploy application to servlet container">
<!-- Copy the contents of the build directory -->
<mkdir dir="${deploy.home}"/>
<copy todir="${deploy.home}">
<fileset dir="${build.home}"/>
</copy>
</target>
<target name="dist" depends="deploy,javadoc"
description="Create binary distribution">
<!-- Copy documentation subdirectory -->
<copy todir="${dist.home}/doc">
<fileset dir="doc"/>
</copy>
<!-- Create application JAR file -->
<jar jarfile="${dist.home}/${app.name}.war"
basedir="${deploy.home}"/>
<!-- Copy additional files to ${dist.home} as necessary -->
</target>
<target name="javadoc" depends="compile" description="Create Javadoc
API documentation">
<mkdir dir="${dist.home}/doc/api"/>
<javadoc sourcepath="src"
destdir="${dist.home}/doc/api"
packagenames="*">
<classpath refid="compile.classpath"/>
</javadoc>
</target>
<target name="prepare">
<!-- Create build directory and copy static content -->
<mkdir dir="${build.home}"/>
<copy todir="${build.home}">
<fileset dir="web"/>
</copy>
</target>
</project>
Contents of my proj_home\build.properties file:
catalina.home=c\:/java/jakarta-tomcat-4.0.3
build.compiler=jikes
For development, I am using Netbeans 3.3.1. However, I am NOT using the
integrated Tomcat 3.2 container.
Here are the log contents generated in the following way:
Delete all logs
Start tomcat
Browse to http://localhost:8080/first
Browse to http://localhost:8080/second
Modify FirstServlet
Ant all, ant deploy
Browse to http://localhost:8080/first
Verify no change
Stop tomcat
I have attached the log files to this message.