Servlets, Threads and ThreadNames and Tomcat!

Hi gurus's
I found something interesting but am not sure if this is in the servlet container spec.....
When a new client request comes in, servlet serves that request on a separate thread. Now I change the thread name for some requests. I found that servlet container (Tomcat 4.1.24 in my case) seems to be reusing the threads to serve client requests. i.e when another request comes in (after the first request has finished) the thread name is still set to what I had set it to during the first request....
This implies that Tomcat actualyl re-uses the threads it creates to serve client requests. I thought that it would create a completely new thread for each request.
Does anyone know anything about this??? Or is this in the spec for container writers where they start n number of threads and just pool these threads and re-use them to serve client requests???
I would appreciate your help because this causes problems with my logging mechanism as I rely on unique thread name...

The servlet specs does not require servlet containers to start a new thread for each request.
For performance purposes, most, if not all, servlet containers re-use threads to service requests.
You may want to switch over to the Log4J (http://jakarta.apache.org/log4j) logging mechanism. Its concept of Nested Diagnostic Contexts (NDCs) is much better than relying on the uniqueness of thread names.

Similar Messages

Servlet, threads and StaleConnectionException

Hi folks,
we're currently developing an J2EE application in which we have to works with threads started and stopped via web interface: on a test JSP page, we have a button to start the thread and another button to stop the same thread. At the moment, we have just one thread which periodically checks some data on a DB installed on the same machine on which the application server runs.
The problem is, when the thread is restarted, a StaleConnectionException is thrown, which code SQL1224N The DB is DB2 from IBM and the application server is WebSphere 5; both of they run on a Linux Red Hat system.
We use a JDBC Connection provided by the application server.
We can't understand where is the problem. We suppose that the problem is creating independent threads from a servlet, as J2EE paradigm suggests not to do so. Is there anybody that encountered the same (or similar) problem ? Any suggestion ?
Thanx a lot in advance.
Claudio.

Hi Claudio,
hope this helps ...
http://archive.midrange.com/java400-l/200301/msg00039.html
WS App Throwing a StaleConnectionException
Q: My WebSphere application is throwing a
com.ibm.websphere.ce.cm.StaleConnectionException. What is the problem?
This exception indicates that the connection is no longer valid. Here are some
possible causes of it:
1)The database management system is down.
2)The application previously closed the connection.
3)The connection has been orphaned, which means that the application has held
the connection for too long without using it. The Data Source property "Orphan
timeout" specifies the maximum number of seconds that an application can hold a
connection without using it. If an app holds a connection without using it
beyond the Orphan timeout value, WebSphere may return the connection to the
connection pool. If the connection is returned to the connection pool, and the
application then tries to use the connection, the Stale ConnectionException is
thrown.

Some problems with servlet.jar and tomcat 4.1.27

Hello everybody,
I used to work with tomcat 3.3.1 and i've decided to use tomcat 4.1.27 now. The manual explains that we have to change de version of servlet.jar, it's done with servlet-2.3.jar but on tomcat starting i have this message:
jar not loaded. See servlet spec [...]. Offending class: javax/servlet/Servlet.class
what can i do, i've red all de documentation and i think all versions a OK??
thanks per advance
antoine

I am running Tomcat 4.1.18, so your configuration may be slightly different. I found the Servlet.class file you are missing residing in the Tomcat/common/lib directory in the Servlet.jar file. Check your path and also make sure your Servlet.jar file contains the missing class.

Servlet, Eclipse and Tomcat

Dear friends,
Need help to exceutive my first servlet :)
Dev Environment
Eclipse 3.0, Tomcat 5.5, OS: Win 2K Professional
Here is my servlet code:
package com.jspservletcookbook;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class FirstServlet extends HttpServlet{
public void doGet(HttpServletRequest request,      HttpServletResponse response) throws ServletException, java.io.IOException{
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
out.println("<html><head>");
out.println("<title>Help Page</title></head><body>");
out.println("<h2>Please submit your information</h2>");
out.println(     "<form method=\"post\" action=\"" + request.getContextPath() +"/firstservlet\" >");
out.println("<table border=\"0\"><tr><td valign=\"top\">");
out.println("Your first name: </td> <td valign\"top\">");
out.println("<input type=\"text\" name=\"firstname\" size=\"20\">");
out.println("</td></tr><tr><td valign=\"top\">");
out.println("Your email: </td> <td valign=\"top\">");
out.println("<input type=\"text\" name=\"email\" size=\"20\">");
out.println("</td></tr><tr><td valign=\"top\">");
out.println("<input type=\"submit\" value=\"Submit Info\"></td></tr>");
out.println("</table></form>");
out.println("</body></html>");
} //doGet
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException {
Enumeration paramNames = request.getParameterNames();
String parName;
boolean emptyEnum = false;
if(!paramNames.hasMoreElements())
emptyEnum=true;
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><head>");
out.println("<title>Submitted Parameters</title></head><body>");
if(emptyEnum)
out.println("<h2>Sorry, the request does not contain any parameters</h2>");
else
out.println("<h2>Here are the submitted parameter values</h2>");
while(paramNames.hasMoreElements()){
parName = (String)paramNames.nextElement();
out.println("<strong>" + parName + "</strong> :" +
request.getParameter(parName));
out.println("<br />");
}// while
out.println("</body></html>");
} // doPost
}web.xml file
<?xml version="1.0" encoding="ISO-8859-1"?>
<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">
<web-app>
<display-name>Servlet 2.4 deployment descriptor</display-name>
<servlet>
    <servlet-name>FirstServlet</servlet-name>
    <servlet-class>com.jspservletcookbook.FirstServlet</servlet-class>
   </servlet>
   <servlet-mapping>
     <servlet-name> FirstServlet </servlet-name>
     <url-pattern>/com.jspservletcookbook.FirstServlet</url-pattern>
   </servlet-mapping>
<session-config>
    <session-timeout>15</session-timeout>
</session-config>
</web-app>
Additional Notes:-
The code has been complied in eclipse without any errors.
I copied my Project directory structure from eclipse workspace to Tomcat. It appears in Tomcat as:|_Tomcat 5.5
|__webapps
|__jspservletscookbook
|__WEB_INF
|__classes
|__lib
'classes' folder include folder 'com', 'jspservletcookbook' and files FirstServlet.class and FirstServlet.java
'lib' includes servlet-api.jar and catalina.jar
'WEB_INF' folder has web.xml file
Tomcat 5.5 is working properly.thanks!
ravinder

First thing is this, you've got spaces around the name FirstServlet in your mapping section:
<servlet-mapping>
     <servlet-name> FirstServlet </servlet-name>
     <url-pattern>/com.jspservletcookbook.FirstServlet</url-pattern>
   </servlet-mapping>should be
<servlet-mapping>
     <servlet-name>FirstServlet</servlet-name>
     <url-pattern>/com.jspservletcookbook.FirstServlet</url-pattern>
   </servlet-mapping>Second of all, I'm not a big fan of mapping the fully qualified name to the server, you may want to think about replacing /com.jspservletcookbook.FirstServlet with something smaller like, firstservlet or first_servlet.do, something like that.
Lastly, how are you trying to load the servlet? Are you typing:
http://<servername>:<port>/jspservletscookbook/com.jspservletcookbook.FirstServlet in the address bar?

Servlets and Tomcat/Apache

Okay,
Tomcat 4.1 running with Apache.
Installed mod_jk, piece of cake.
JSPs run through Apache like a dream.
Tomcat examples ( jsp and servlets) run through Apache perfectly ( that is no :8080 business).
My JSP's run through Apache no problem. Works great.
My SERVLETS WILL NOT RUN THROUGH APACHE FOR ANYTHING.
My context looks like this in server.xml:
<Context path="/nuweb" docBase="/home/shared/nuweb" debug="0"
reloadable="true" crossContext="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="nuweb" suffix=".log"
timestamp="true"/>
</Context>
Note: that I am not under <TOMCAT_HOME>/webapps.
The reason is that I will, in production not be the Unix admin on the server. I will only have priviledges within my directory. I will not be able to drop war files in the webapps directory. I will not be able
to start and stop tomcat or apache ( there are 100 diffrent apache contexts on that machine and someday many of them will be going through tomcat for jsp and servlet support).
My servlets will only run if I put :8080/nuweb/servlet/HelloServlet in the URL. Take off the 8080 and I get Page not found. Not the tomcat 404 page, the Browswer 404 errror.
Here is my web.xml which lives in the WEB-INF directory of of /home/shared/nuweb
<?xml version="1.0" encoding="UTF-8"?>
<!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>
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>org.nu.servlet.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>invoker</servlet-name>
<url-pattern>/servlet/*</url-pattern>
</servlet-mapping>
</web-app>
In devlopment I am on a system that is very close to what the production server will look like ( Tomcat 4.1 same version of Apache, same Unix ). In development I can restart all the servers edit server.xml etc. On the production I would have to schedule that stuff. I want to be able to compile classes and drop them in the WEB-INF/classes... directory and have them run. Is that too much to ask?

Hi,
I am also facing same error.
I am not able to view my servlets via apache web server.
ie when i do "http://localhost/enlighta/logon"
I get http 404 page not found error
but when I do http://localhost:8080/enlighta/logon
all works fine
I am using apache 2 and tomcat 4.5
This is I have done:
1.I have http server running on port 80
2. appserver on port 8080
3. I have a war file enlighta.war deployed on webserevr
4. The static content like images and html page I have moved to webserver
5. The servlet context of the app on the app server is /enlighta
6. In the web.xml I have defined all the servlet maping.
the port 8009 has the connecter is running/listening.
the configuration
sever.xml on tomcat

<Connector port="8009"
enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
httpd.conf on apache
# Load mod_jk
LoadModule jk_module modules/mod_jk.so
# Configure mod_jk
JkWorkersFile conf/workers.properties
JkLogFile logs/mod_jk.log
JkLogLevel info
# First Virtual Host.
<VirtualHost 192.168.1.2:8080>
ServerAdmin [email protected]
DocumentRoot /enlighta/
ServerName localhost
ErrorLog logs/enlighta_error_log
TransferLog logs/enlighta_access_log
JkMount /enlighta/* ajp13
</VirtualHost>
workers.properties
worker.list=ajp13
# Defining a worker named ajp13w and of type ajp13
# Note that the name and the type do not have to match.
worker.ajp13.type=ajp13
worker.ajp13.host=localhost
worker.ajp13.port=8009
Now I feel I am doing something wrong on defining virtual host.
Or may be something else is wrong.
I have gone thru the previous thread but I dont have mod_jk.conf file.
Please help!!!
Thanks
Sachin

Servlets, Threads, sleep and wait

Hi,
I am new to servlet programming and have a problem.
I want to create a servlet that is also Runnable. It should hold the HTTP request open, and then wait() or sleep(), waking up regularly to send data to the client.
My code seems to work OK, and in the server logs I can see the debug messages where my servlet is sleeping and waking up. However, it doesn't keep the connection open. Instead, any clients that try to connect instantly receive an empty response.
Can anyone explain why this is? I am a bit lost. Is the server (Tomcat) cutting my request off when I start to sleep or what?
dave

OK. Now seems like I have it working with sleep().
I was doing something pretty dumb and assuming that a new HttpServlet instance was created for every request - doing things like this.request = request; - obviously this didn't work too wlell ;-)
Now just using Thread.sleep() it works much better
One more question - how can I get a separate servlet to call notify() on this servlet so that it wakes up and delivers its message? (I know I need to call wait() not sleep())
Thanks
dave

Can't execute windows command in servlet with JDK1.5 and tomcat 5

Hi all,
I have a web application which uses a servlet to execute windows commands, such as "mkdir", "mv", and "rmdir". In my servlet, I use java Runtime() class to implement the execution.
Under jsdk1.4 and tomcat 4, it is fine for the servlet to execute those command. But uncer jdk1.5 and tomcat 5, it gives the following error:
error to execute a command: java.io.IOException: CreateProcess: mkdir c:\m7q28 error=2
java.io.IOException: CreateProcess: mkdir c:\m7q28 error=2
Please help me if you have any idea. Thanks.

And be sure to read this:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

JAXM 1.1.2 and Tomcat 4.1.29

Dear all,
After fiddling with the configs of JAXM and Tomcat, (besides searching the mail archives), I still can't figure how to make them work together.
I copied dom4j.jar, jaxm-api.jar and jaxm-runtime.jar to $CATALINA_HOME/common/lib. Then I copied jaxm-provider.war and jaxm-provideradmin.war to $CATALINA_HOME/webapps.
I can access http://localhost/jaxm-provideradmin. However, when I clicked on "Profiles" on the left frame, I got the error message below. So I thought, may be I need to copy saaj-impl.jar and saaj-api.jar to $CATALINA_HOME/common/lib. This time I got different error message. (See below)
I have also tried to include the CLASSPATH specified in catalina.sh of jwsdp-1.3. However, still no luck.
For your info, I am doing all these on HP-UX 11.00, running JDK 1.3.1.
Any pointer would be greatly appreciated.
Thanks.
org.apache.jasper.JasperException: javax/xml/soap/SOAPElement
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:553)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
at java.lang.Thread.run(Unknown Source)
----- Root Cause -----
javax.servlet.ServletException: javax/xml/soap/SOAPElement
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:536)
at org.apache.jsp.jaxm_profile_default_jsp._jspService(jaxm_profile_default_jsp.java:351)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:553)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
at java.lang.Thread.run(Unknown Source)
========================================================================
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:553)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
     at java.lang.Thread.run(Unknown Source)
root cause
javax.servlet.ServletException
     at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:536)
     at org.apache.jsp.jaxm_profile_default_jsp._jspService(jaxm_profile_default_jsp.java:351)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:553)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
     at java.lang.Thread.run(Unknown Source)
Apache Tomcat/4.1.29

Dear all,
Problem solved. Once I upgraded to JDK 1.4.2, the problem seems to go away.

Directory Editor and Tomcat

Hey all,
I am installing Directory Editor 6.0, and following the install documentation, I added some lines to the 'catalina.policy' file in the Tomcat configuration to allow DE to work properly.
grant codeBase "file:${catalina.home}/webapps/de/-" {
permission java.security.AllPermission;
grant codeBase "file:${catalina.home}/webapps/de/-" {
permission javax.security.auth.AuthPermission "getLoginConfiguration";
permission javax.security.auth.AuthPermission "setLoginConfiguration";
permission javax.security.auth.AuthPermission "createLoginContext.SunDirectoryLogin";
permission javax.security.auth.AuthPermission "modifyPrincipals";
permission java.util.PropertyPermission "*", "read,write";
permission java.net.SocketPermission "*", "connect,resolve";
permission java.io.FilePermission "*", "read, write";
permission java.util.PropertyPermission "Debug.enable", "read";
grant {
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.lang.RuntimePermission "accessClassInPackage.sun.beans.*";
permission java.lang.RuntimePermission "accessClassInPackage.sun.io";
permission java.lang.RuntimePermission "accessDeclaredMembers";
};I deployed the WAR file, and was able to perform the initial configuration of DE (location of the config directory, what suffix to configure, what credentials to connect to the DS as...). Once those steps finish, I can see data in the DS under the newly created "Services" OU for DE, but when I try to login to DE as either a regular user or as an administrative user, I get an error. The catalina.out log show the following:
2007-06-25 16:00:14,398 [TP-Processor11] WARN org.apache.struts.action.RequestProcessor - Unhandled Exception thrown: class java.lang.SecurityException
2007-06-25 16:00:14,398 [TP-Processor11] ERROR com.sun.dml.web.DmlRequestProcessor - No exception handler for java.lang.SecurityException: Unable to locate a login configuration. Forwarding to error page.
java.lang.SecurityException: Unable to locate a login configuration
        at com.sun.security.auth.login.ConfigFile.<init>(ConfigFile.java:97)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
        at java.lang.Class.newInstance0(Class.java:350)
        at java.lang.Class.newInstance(Class.java:303)
        at javax.security.auth.login.Configuration$3.run(Configuration.java:216)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.login.Configuration.getConfiguration(Configuration.java:210)
        at com.sun.dml.web.LoginAction.execute(LoginAction.java:113)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
        at com.sun.dml.web.DmlRequestProcessor.processActionPerform(DmlRequestProcessor.java:180)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)
        at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
        at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:754)
        at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:684)
        at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:876)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.IOException: Unable to locate a login configuration
        at com.sun.security.auth.login.ConfigFile.init(ConfigFile.java:206)
        at com.sun.security.auth.login.ConfigFile.<init>(ConfigFile.java:95)
        ... 32 moreIs there anything else that needs to be done to allow access for DE when using Tomcat?
TIA, Mark

here is the info re: Directory Editor and Tomcat 5.5:
http://docs.sun.com/app/docs/doc/820-2487/de-bugs-fixed-known
6397929
When deploying on Tomcat 5.5, login fails due to a missing JAAS configuration file
To work around this issue, first create tomcat-install-path/bin/setenv.sh containing the following line:
JAVA_OPTS="-Djava.security.auth.login.config=$CATALINA_HOME/conf/jaas.conf"
Next create tomcat-install-path/conf/jaas.conf. Edit the file to contain the following lines:
SunDirectoryLogin {
com.sun.dml.auth.SunDirectoryLoginModule required;
};

Apache server and tomcat

Today i got from apache website the Apache server 2.0.28 (for windows 2000)
y tomcat server 5.0 , i dont know how work with them. (how setting?)(what do it?)
i worked only with tomcat server for show my jsp pages that using servlets-
but i got access troubles from internet (not localhost), the jsp pages only show parts.
for that reason i want to use the Apache server and tomcat server together, but how setting
each one of them, please help me. thanks-

You know, it also helps if you take the time to respond to requests for more information.
http://forum.java.sun.com/thread.jsp?thread=473507&forum=45&message=2192194
I'm sure there were lots of other people wondering exactly which problem you were having, and if you don't answer, but keep creating new posts asking for help, people decide it's just not worth their time and effort to help you.

Communication problem between NetBeans and Tomcat

hi!
i got a quite mysterious problem. here is what happens:
- i start NetBeans 5.5.1 (the first time)
- i want to debug my JSF-Project, the Debugger starts
- After a few seconds the debugger waits for tomcat (it sais: "Waiting for Tomcat...") and tomcat starts
- Again after a few seconds the tomcat-debugger-output sais "Tomcat startet in 3333 ms".
okay.
when i enter http://localhost:8084/ in my browser i get the tomcat homepage, so the server has definitely started! But nothing happens in NetBeans and nothing happens with my project....
In the lower-right corner i see this blue working-bar that sais "deploying project" but nothing happens. The Project-Debugger-Output still sais "Waiting for Tomcat..." but nothing happens...
And after something around 3 minutes (i guess it's a timeout) i get the error "Starting of Tomcat failed." But is HAS started, i can login to the Administration-Area in my browser!
so i guess there is a communication problem between netbeans an tomcat. Netbeans waits for a message from tomcat but tomcat doesn't send it..or netbeans doesn't understand it.
But the story goes on:
When i press the debug-button a second time it takes only a few seconds till i get the message: "Tomcat server port 8084 already in use". OF COURSE! Because Tomcat has already startet and can't be stoped by NetBeans.
i'm trying to solve this problem for 4 days now, so i would be very happy if anyone has an idea where to start/continue the search...
thanks,
flo.
some system-info:
- windows vista business 32-bit
- no firewall is running
- AntiVir Personal Edition IS running
- Yahoo Widgets Engine IS running
- no other software is running
and finally the tomcat-log:
Using CATALINA_BASE: C:\Users\Administrator\.netbeans\5.5.1\apache-tomcat-5.5.17_base
Using CATALINA_HOME: C:\Program Files\NetBeans\enterprise3\apache-tomcat-5.5.17
Using CATALINA_TMPDIR: C:\Users\Administrator\.netbeans\5.5.1\apache-tomcat-5.5.17_base\temp
Using JRE_HOME: C:\Program Files\Java\jdk1.5.0_12
Listening for transport dt_shmem at address: tomcat_shared_memory_id
21.09.2007 18:27:50 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.5.0_12\bin;.;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\ThinkPad\ConnectUtilities;C:\Program Files\Common Files\Teleca Shared;C:\Program Files\Common Files\Adobe\AGL;C:\Program Files\MySQL\MySQL Server 5.0\bin;C:\Program Files\cvsnt;
21.09.2007 18:27:50 org.apache.coyote.http11.Http11BaseProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8084
21.09.2007 18:27:50 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1862 ms
21.09.2007 18:27:50 org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
21.09.2007 18:27:50 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.5.17
21.09.2007 18:27:50 org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
21.09.2007 18:27:53 org.apache.coyote.http11.Http11BaseProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8084
21.09.2007 18:27:54 org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
21.09.2007 18:27:54 org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/31 config=null
21.09.2007 18:27:54 org.apache.catalina.storeconfig.StoreLoader load
INFO: Find registry server-registry.xml at classpath resource
21.09.2007 18:27:54 org.apache.catalina.startup.Catalina start
INFO: Server startup in 3626 ms

As i wrote before, the same problem occured for me. I have found a solution which is : Go to tools menu and then select options . In the proxy info, select No Proxy.
I hope this help you

Authentication problem with JWS and TOMCAT

Hi everyone !
I have a problem with Java Web Start (1.0.1) and Tomcat (4.0.4).
I'm trying to call my application via Web server Tomcat with restricting access.
My configuration is the following :
The deployment descriptor web.xml is:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!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>
<mime-mapping>
<extension>jar</extension>
<mime-type>application/java-archive</mime-type>
</mime-mapping>
<mime-mapping>
<extension>java</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jnlp</extension>
<mime-type>application/x-java-jnlp-file</mime-type>
</mime-mapping>
<mime-mapping>
<extension>JNLP</extension>
<mime-type>application/x-java-jnlp-file</mime-type>
</mime-mapping>

<security-constraint>
<web-resource-collection>
<web-resource-name>Entire Application</web-resource-name>
<url-pattern>/*</url-pattern>
</web-resource-collection>
<auth-constraint>

<role-name>standard</role-name>
</auth-constraint>
</security-constraint>

<login-config>
<auth-method>BASIC</auth-method>
<realm-name>MY APPL</realm-name>
</login-config>
</web-app>
And jnlp File is:
<jnlp
spec="1.0+"
codebase="http://host:8080/Official/"
href="Application.jnlp">
<information>
<title>Application release 0.10</title>
<vendor> XXXX </vendor>
<homepage href="/"/>
<description>Application</description>
<description kind="short">My Application</description>
<icon href="Icon.gif"/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.3"/>
<jar href="Jar1.jar"/>
<jar href="Jar2.jar"/>
<jar href="Jar3.jar"/>
<jar href="Jar4.jar"/>
<jar href="Jar5.jar"/>
<jar href="Jar6.jar"/>
<jar href="Jar7.jar"/>
<jar href="Jar8.jar"/>
<jar href="Jar9.jar"/>
<jar href="Jar10.jar"/>
<jar href="MyApplication.jar"/>
</resources>
<application-desc main-class="com.xxxx.tool.cm.MyApplication"/>
</jnlp>
With the above configuration the Java Web Start not work.
I'm expecting the message box for insert username and password instead it returns the messagge error :
An error occurred while launching/running the application.
Vendor: XXXX
Category: Download Error
Unable to load resource: http://host:8080/Official/Application.jnlp
The Exception error is:
JNLPException[category: Download Error : Exception: java.lang.NullPointerException : LaunchDesc: null ]
     at com.sun.javaws.cache.DownloadProtocol.doDownload(Unknown Source)
     at com.sun.javaws.cache.DownloadProtocol.isLaunchFileUpdateAvailable(Unknown Source)
     at com.sun.javaws.LaunchDownload.getUpdatedLaunchDesc(Unknown Source)
     at com.sun.javaws.Launcher.downloadResources(Unknown Source)
     at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
     at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
I have tried to remove the restrict access in the deployment descriptor (web.xml) and java Web Start WORKS !!!!!!
I'll appreciate any idea or hint!
Thanks in advance

Check this out
http://forum.java.sun.com/thread.jsp?forum=38&thread=456250
Mad Einstein

Why do I need to restart Apache and Tomcat every time a java file is change

If a java file is changed and complied the changes are not reflected if Tomcat is not restarted.
The settings in server.xml are as:

<Context path="/manager" docBase="manager" debug="0" privileged="true"/>
<Context path="/cf" docBase="cf" debug="0" reloadable="false"/>
Here "cf" is my Application folder under webapps. The reloadable property when set to "true" for standalone Tomcat on Windows98 reflects the changes for compiled java files without restarting Tomcat. But on Linux 7.1 with Apache 1.3.19 and Tomcat 4.0.3 this is not working.
Also tried out with Manager Application of tomcat-users.xml with reloadable="false" as well as reloadable="true",
But when I reload the application using the command
http://servername:8080/manager/reload?path=/appli.name
It tells me that the application is reloaded but changes in the java file are still not reflected.
Also when reloaded through Manager Servlet, Only my load-on-startup servlet is reloaded, but other java classes are not.
Is it neccessary to execute this reload command from the server itself. I m executing it from a remote m/c. and have mapped the application with a domain name virtually.
Is it the case with Tomcat on Linux with Apache. Or is something going wrong on my part.
Can someone Help out plz.
Regards,
Rupali

or you can "touch" your web.xml file.
touch web.xmlor that command is for *nix systems, not sure what the Windows command is. But basically, when you edit the web.xml, even if it means updating the last modified time, it will restart only your application and you should see the changes.

NetBeans 5.0 and Tomcat 4.1

Hello,
I'm using NetBeans 5.0 and I have been using the Bundled Tomcat version 5.5.9 for my servlet container and everything's been great. Now that I'm ready to push my application up to a web host, I found that my host (lunarpages) runs with Tomcat 4.1 which uses version 2.3 of the servlet container. Tomcat 5.5 uses servlet container 2.4.
So I downloaded Tomcat 4.1 (which has 2.3) and I don't know how to properly tell Netbeans to use it. When I open Server Manager and select 'Add Server', I can't just tell NetBeans to point to my Tomcat 4.1 directory. It wants me to select from a dropdown list of servers and Tomcat 4.1 isn't in the list.
I tried to fake NetBeans out by selecting the 'Tomcat 5' server and pointing to my Tomcat 4.1 directory but I'm getting the following message when I try to run:
FAIL - Unknown command /deploy
C:\workspace\myApp\nbproject\build-impl.xml:425: Deployment error:
Can anyone point me in the right direction on how to get Tomcat 4.1 running with NetBeans 5.0?
Thanks,
Eric

I found that my host (lunarpages) runs with Tomcat 4.1 which uses version 2.3 of the servlet containerPlease read the post before answering, the reasoning is crystal clear.
I don't have a concrete answer to this problem, but I do have a suggestion.
1) You can add your own tomcat server to netbeans. Under the runtime tab you will find servers, if you right click this you can add a server. Use this to manually configure your own server
2) as for the servlet spec problem, when creating a web project setting the java EE version to 1.3 might solve the problem... I can't tell this for sure because I've never done it.

Eclipse and Tomcat questions

Hi everyone,
Lastnight I setup Eclipse to work with Tomcat, which works very good, but there are something I don't understand.
1. My files are put in my workspace in (C:\Documents and Settings\...etc)
How does Tomcat (which is installed in C:\Tomcat) know that it should get the files from my workspace directory?
Because in the C:\Tomcat directory I can't find any .XML file that refers to my workspace directory.
2. How I developed my servlets till now, I had some other free editor, I needed to compile my servlets then restart Tomcat and then test it.
With Eclipse + Tomcat plugin, all I need to do save the servlet and apparently the source code is compiled automatically. All I need to do is refresh the servlet in my browsers (very handy and easy to develop like this). But my question is, does Eclipse compile the servlet automatically after saving? And why doesn't tomcat have to be restarted?
Just a few questions to understand it a bit better, I'm really happy with this setup as it makes everything a lot easier.
Regards,
Steven.

I believe you will need to become familiar with and install:
http://www.eclipse.org/webtools/
HTH
Darins
"raul" <[email protected]> wrote in message
news:b894c367f9750f367a2e8336f8fe93b1$[email protected]..
> Hi, I downloaded the latest version of eclipse 3.1 and I've installed
> apache tomcat in mi PC.
> Eclipse has a plugin : org.eclipse.tomcat_4.1.30.1
> My problem is that I don't know how to use the tomcat server with eclipse.
> I readed some tutorials and they say that I have to configure using menu
> Window > Preferences and then I will see the tomcat option. But that
> option doesn't appears or I couldn't see it.
> Another tutorial say that I have to activate a plugin in the following
> menu location: Window > Customize Perspective > Commands and select the
> checkbox for tomcat , but that option doesn't appears either.
> What can I do, I want to use eclipse and tomcat together...
> Can someone help me with this questions?
>
> Thanks so much.
> Raul Torres
>
>
>

Servlets, Threads and ThreadNames and Tomcat!

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