Tomcat config problem: jsp can't find a bean class

I've been working within a JSP/Javabeans/JDBC/MySQL architecture with Windows XP and Websphere. So far everything works perfectly. Now I need to get the same project and make it run with a Tomcat server.
I've already set the Tomcat server but its not working properly. I have a problem when a jsp tries to access any class inside my project's package.
For example, when I make the next call:
<jsp:useBean id="ctrl" class="myPack.myBean" scope="page"/>
I get an error saying:
Error: 500
Location: /myproj/login.jsp
Internal Servlet Error:
org.apache.jasper.JasperException: Unable to compile C:\Program Files\jakarta-tomcat-3.3.1\work\DEFAULT\myproj\login_1.java:64: Class myPack.myBean not found.
myPack.myBean ctrl = null;
^
I believe that my problem cames when setting the Tomcat environment. So far what I have done is:
* install j2sdk-1.3.1.03
* install jakarta-tomcat-3.3.1
* install mysql-max-3.23.51-win
* set the environment variable JAVA_HOME
* set the environment variable TOMCAT_HOME
* set the environment variable MYSQL_HOME
* add the %JAVA_HOME%\bin to the PATH
* create 'myproj' directory inside TOMCAT_HOME\webapps
* create into 'myproj' the subdirectory WEB-INF\classes and copy into it the jar file with my java classes (myPack.jar).
* copy into TOMCAT_HOME\lib\apps the JDBC driver for MySQL.
* copy my project files (jsp, html, images, etc.) and its structure into 'myproj' directory.
I haven't include anything into the CLASSPATH because so far I've read that Tomcat will automatically include all the classes that are inside the directories TOMCAT_HOME\myproj\WEB-INF\classes and TOMCAT_HOME\lib\apps.
I really don't have a clue about what I'm doing wrong. I'd apreciate if anyone can help me out with this one ;) ... I thank you in advance!

Hi, it's me again!.
Since nobody replied to me I'm replying myself :D
Ok, seriously is just to let you know that I have solved my problem and I would like to tell you how I solved it ... somebody might be doing the same mistake than I was doing and could found this helpful. I just forgot to mention that I was using Tomcat 3.3.
Well, first of all let me tell you that there was nothing wrong with the previous configuration that I post in my first message. Everything is ok except that in the TOMCAT_HOME\webapps\myproj\WEB-INF\classes directory I was putting my classes as a jar file, so I deleted it and instead I put the directory myPack with its unpacked class files. THIS SOLVED MY PROBLEM!!!
First I was trying to do some complicated things editing bat and xml files, but as a matter of fact I found it's quite simple. Furthermore, I was really surprised by the performance of Tomcat. I'm relly happy for that !! ;)
Hope it works for you,
Ernesto

Similar Messages

JSP can't find bean class!!!!!

First of all, I'm using jdk1.4 beta and Jakarta's tomcat version 4.0.1 release build.
Hello. I desparately need help. I have a JavaBean class ("CarBean.class") saved in %catalina_home%\webapps\root\myapp\web-inf\classes\com\wrox\cars\CarBean.class
I also have a jsp page saved as carpage.jsp in %catalina_home%\webapps\root\myapp\
So when I point my browser to http://localhost:8080/myapp/carpage.jsp, I get an internal server error. It appears it can't find the JavaBean class for some reason. I'm pretty sure I have my envionment variables set up right. I can get it to work, if I save the JavaBean class in c:\jdk1.4\jre\class\com\wrox\cars
Here's my JavaBean class source file:
package com.wrox.cars;
import java.io.Serializable;
public class CarBean implements Serializable {
public CarBean() {
private String make = "Ford";
public String getMake() {
return make;
public void setMake(String make) {
this.make = make;
and here's my jsp page:
<html>
<head>
<title>Using a JavaBean</title>
</head>
<body>
<h2>Using a JavaBean</h2>
<% com.wrox.cars.CarBean myCar = new com.wrox.cars.CarBean(); %>
I own a <%= myCar.getMake() %>
<% myCar.setMake("Ferrari"); %>
Now I own a <%= myCar.getMake() %>
</body>
</html>
This is the only thing I've modified in the server.xml file:
<Context path="/myapp" docBase="myapp" debug="0" reloadable="true"/>
I'm not new to java, just JSP. I just don't know why I can't get the jsp to locate the JavaBean class. I remember I used to have an older version of Tomcat and I recall not having any problems. It seems the Tomcat 4.XX is somewhat significantly different than previous versions. Perhaps I configured my Tomcat or server.xml wrong? Help would be greatly appreciated. Thanks.

Hi,
I am having a similar problem. I was wondering if you found a solution. The error I get is listed below. I have my jsp file at ../webapps/ROOT/myapp/web and my bean file located at ../webapps/ROOT/myapp//src.
Any help will be highly appreciated
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: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated.
An error occurred at line: 8 in the jsp file: /DataBaseSelect.jsp
Generated servlet error:
D:\WeeklyReportProject\jwsdp-1_0_01\work\Standard Engine\localhost\Test\DataBaseSelect$jsp.java:61: Class org.apache.jsp.DataBaseSelect not found.
DataBaseSelect select = null;
^
An error occurred at line: 8 in the jsp file: /DataBaseSelect.jsp
Generated servlet error:
D:\WeeklyReportProject\jwsdp-1_0_01\work\Standard Engine\localhost\Test\DataBaseSelect$jsp.java:64: Class org.apache.jsp.DataBaseSelect not found.
select= (DataBaseSelect)
^
An error occurred at line: 8 in the jsp file: /DataBaseSelect.jsp
Generated servlet error:
D:\WeeklyReportProject\jwsdp-1_0_01\work\Standard Engine\localhost\Test\DataBaseSelect$jsp.java:69: Class org.apache.jsp.DataBaseSelect not found.
select = (DataBaseSelect) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "DataBaseSelect");
^
3 errors, 1 warning

ERROR:can't find native registration class while J2EE Engine startup

Hi
Iam trying to integrate a Java Profiler application which contains a native library(namely ProfilerDLL.dll) with the J2EE Server.Here are the steps which i had followed
1. Added the following Java option through the config tool of WebAS.<b> -XrunProfilerDLL</b>.
2.Restarted the server.
Server does not starup and throws a error with exit
code -1 .
Here is the log
JStartupIReadSection: read node properties [ID7217950]
-> node name       : server0
-> node type       : server
-> java path       : C:\j2sdk1.4.2_04
-> java parameters : -Djava.security.policy=./java.policy -Djava.security.egd=file:/dev/urandom -Dorg.omg.CORBA.ORBClass=com.sap.engine.system.ORBProxy -Dorg.omg.CORBA.ORBSingletonClass=com.sap.engine.system.ORBSingletonProxy -Djavax.rmi.CORBA.PortableRemoteObjectClass=com.sap.engine.system.PortableRemoteObjectProxy -Djava.library.path=/usr/sap/J2E/JC00/j2ee/os_libs -XX:NewSize=32m -XX:MaxNewSize=64m -XX:NewRatio=3 -XX:+DisableExplicitGC -XX:MaxPermSize=128m -XrunProfilerDLL:1 -Xbootclasspath/a:jakarta-regexp.jar;profiler_trace.jar;commons-lang.jar -D__PROFILER_PACKAGE_FILTER=__A__com.sap.engine.boot.Start;__M__sun.;__M__com.sun.;__M__java.;__M__javax.; -D__PROFILER_TIMING_METHOD=1 -Drdbms.driverLocation=C:/sapdb/programs/runtime/jar/sapdbc.jar -Dsys.global.dir=C:/usr/sap/J2E/SYS/global/
-> java vm version : 1.4.2_04-b05
-> java vm vendor : Java HotSpot(TM) Server VM (Sun Microsystems Inc.)
-> java vm type    : server
-> java vm cpu     : x86
-> heap size       : 256M
-> init heap size : 128M
-> root path       : C:\usr\sap\J2E\JC00\j2ee\cluster\server0
-> class path      : .\bin\boot\boot.jar;.\bin\boot\jaas.jar;.\bin\system\bytecode.jar;.
-> OS libs path    : C:\usr\sap\J2E\JC00\j2ee\os_libs
-> main class      : com.sap.engine.boot.Start
-> framework class : com.sap.bc.proj.jstartup.JStartupFramework
-> registr. class : com.sap.bc.proj.jstartup.JStartupNatives
-> framework path : C:\usr\sap\J2E\JC00\j2ee\os_libs\jstartup.jar
-> shutdown class : com.sap.engine.boot.Start
-> parameters      :
-> debuggable      : no
-> debug mode      : no
-> debug port      : 1024
-> shutdown timeout: 120000
[Thr 420] JLaunchISetDebugMode: set debug mode [no]
[Thr 5780] JLaunchIStartFunc: Thread 5780 started as Java VM thread.
JHVM_LoadJavaVM: VM Arguments of node [server0]
-> stack   : 262144 Bytes
-> arg[ 0]: exit
-> arg[ 1]: abort
-> arg[ 2]: -Denv.class.path=;C:\D\vim\Intellisense\javaft.jar;C:\j2sdk1.4.2_04\lib\tools.jar
-> arg[ 3]: -Djava.security.policy=./java.policy
-> arg[ 4]: -Djava.security.egd=file:/dev/urandom
-> arg[ 5]: -Dorg.omg.CORBA.ORBClass=com.sap.engine.system.ORBProxy
-> arg[ 6]: -Dorg.omg.CORBA.ORBSingletonClass=com.sap.engine.system.ORBSingletonProxy
-> arg[ 7]: -Djavax.rmi.CORBA.PortableRemoteObjectClass=com.sap.engine.system.PortableRemoteObjectProxy
-> arg[ 8]: -Djava.library.path=/usr/sap/J2E/JC00/j2ee/os_libs
-> arg[ 9]: -XX:NewSize=32m
-> arg[ 10]: -XX:MaxNewSize=64m
-> arg[ 11]: -XX:NewRatio=3
-> arg[ 12]: -XX:+DisableExplicitGC
-> arg[ 13]: -XX:MaxPermSize=128m
-> arg[ 14]: -XrunProfilerDLL:1
-> arg[ 15]: -Xbootclasspath/a:jakarta-regexp.jar;profiler_trace.jar;commons-lang.jar
-> arg[ 16]: -D__PROFILER_PACKAGE_FILTER=__A__com.sap.engine.boot.Start;__M__sun.;__M__com.sun.;__M__java.;__M__javax.;
-> arg[ 17]: -D__PROFILER_TIMING_METHOD=1
-> arg[ 18]: -Drdbms.driverLocation=C:/sapdb/programs/runtime/jar/sapdbc.jar
-> arg[ 19]: -Dsys.global.dir=C:/usr/sap/J2E/SYS/global/
-> arg[ 20]: -Dsys.global.dir=C:\usr\sap\J2E\SYS\global
-> arg[ 21]: -Dapplication.home=C:\usr\sap\J2E\JC00\j2ee\os_libs
-> arg[ 22]: -Djava.class.path=C:\usr\sap\J2E\JC00\j2ee\os_libs\jstartup.jar;.\bin\boot\boot.jar;.\bin\boot\jaas.jar;.\bin\system\bytecode.jar;.
-> arg[ 23]: -Djava.library.path=C:\j2sdk1.4.2_04\jre\bin\server;C:\j2sdk1.4.2_04\jre\bin;C:\j2sdk1.4.2_04\bin;C:\usr\sap\J2E\JC00\j2ee\os_libs;c:\sapdb\programs\bin;c:\sapdb\programs\pgm;C:\PROGRA1\SECUDE\SECUDE1;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Symantec\pcAnywhere\;c:\progra~1\ixos\bin;C:\j2sdk1.4.2_04\bin;C:\j2sdk1.4.2_04\jre\bin\server;C:\j2sdk1.4.2_04\lib\tools.jar;C:\Program Files\JProbe Profiler 5.2.1\bin;C:\usr\sap\J2E\JC00\exe;C:\usr\sap\sherlok;C:\cygwin\bin;C:\Program Files\Microsoft SQL Server\80\Tools\BINN;C:\JVMStatAnalysis\jvmstat\bat;;C:\usr\sap\J2E\SCS01\exe;C:\usr\sap\J2E\JC00\exe;C:\usr\sap\J2E\SYS\exe\run
-> arg[ 24]: -Dmemory.manager=256M
-> arg[ 25]: -Xmx256M
-> arg[ 26]: -Xms128M
-> arg[ 27]: -DLoadBalanceRestricted=no
-> arg[ 28]: -Djstartup.mode=JCONTROL
-> arg[ 29]: -Djstartup.ownProcessId=1740
-> arg[ 30]: -Djstartup.ownHardwareId=I1361390454
-> arg[ 31]: -Djstartup.whoami=server
-> arg[ 32]: -Djstartup.debuggable=no
-> arg[ 33]: -DSAPINFO=J2E_00_server
-> arg[ 34]: -DSAPSTARTUP=1
-> arg[ 35]: -DSAPSYSTEM=00
-> arg[ 36]: -DSAPSYSTEMNAME=J2E
-> arg[ 37]: -DSAPMYNAME=INLD50035793_J2E_00
-> arg[ 38]: -DSAPDBHOST=
-> arg[ 39]: -Dj2ee.dbhost=INLD50035793
[Thr 5780] Wed Sep 22 15:30:06 2004
[Thr 5780] JHVM_LoadJavaVM: Java VM created OK.
<u>[Thr 5780] ***ERROR => can't find native registration class [com.sap.bc.proj.jstartup.JStartupNatives] [jhvmxx.c     417]
[Thr 5780] JLaunchCloseProgram: good bye (exitcode=-1)</u>
Any ideas how to fix this problem?
Thanks
S.Shylaja

Btw: I get the warning starting IIS - It seems to me that IIS tries to load Tomcat on-the-fly. The Tomcat load the fails and IIS continues to load successfully.
The beginning of the IIS Event log outputs this:
Apache Jakarta Connector2, Information, Info: [jk_vm_default.c (340)]: vm.detach() ok
Apache Jakarta Connector2, Warning, Error: [jk_worker_jni.c (308)]: Can't find class org/apache/jk/apr/AprImpl
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Apache Jakarta Connector2, Information, Info: [jk_worker_jni.c (252)]: jni.validate() class= org/apache/jk/apr/TomcatStarter
Apache Jakarta Connector2, Information, Info: [jk_vm_default.c (607)]: vm.open2() done
Apache Jakarta Connector2, Information, Info: [jk_vm_default.c (500)]: vm.init(): Jni lib: C:\wwwapps\j2sdk1.4.2_01\jre\bin\client\jvm.dll
/watson

Can't find the bean which was just created??

Hi all.
I am completely stuck at this problem. I'll try to explain it as briefly as possible. (Btw I use Weblogic 8.1 and Oracle 10g DB).
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Does the database insertion and the JMS publish occur in the same XA
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-- Rob
Baba Baba wrote:
Hi all.
I am completely stuck at this problem. I'll try to explain it as briefly as possible. (Btw I use Weblogic 8.1 and Oracle 10g DB).
I create an entity bean (it has a String as a primary key). It has some relationships, everything is set up nicely. Upon creation I put the Id in a JMS message, the message in a JMS queue and finish the method.
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What could be the cause of this? Is there an easy way to explain/solve it?
I appreciate any kind of help. Thanks in advance. Cheers!

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Explanation:
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Code:
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Code:
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edit
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Emca -config dbcontrol db + Can't find file emoms.properties

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actually the above error provide with solutions also.

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(Lightroom 2; Macintosh G5; OS X (10.4.11))
First, the old problem which, though unresolved, is here mostly for background:
A little over a month ago, I posted a question (at http://forums.adobe.com/thread/480423?tstart=0 ).
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In the same collection where I noted the previous problem, I selected an image that I wanted to print. The preview came up with this message:
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I have edited this photo in Lightroom before. I have printed it from Lightroom before (as shown in the Lightroom history). But today it can't be edited, won't print and "could not be found"!!!
I know I can print from Photoshop, or re-import this photo into Lightroom (along with any others that Lightroom "can't find"), though both would require time and re-editing the original. I would rather understand (if that's possible) why this is happening in the first place, so hopefully I can avoid such wackiness in the future.
I realize that may have to burn some sage and hire a Shaman, but any ideas that won't smoke up the house or scare the cats would be most welcome.
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If you have an old goat around that's not doing so well, consider the sacrifice.
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JSP can't find class file

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null

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has changed?

9ias JSP can't find Classes I created

I created a package for my JSP and import it to be used in a JSP. It works great, but for some reason, it displays an error message saying it can't find the class in import. Can anyone explain that? Thanks.

I created a package for my JSP and import it to be used in a JSP. It works great, but for some reason, it displays an error message saying it can't find the class in import. Can anyone explain that? Thanks.

My JSP can't find a class file

Hi
I am trying to view a JSP but I get ClassNotFoundException. I know that it means that it can't find the class but I can't understand why.
my directory structure:
Intranet->source
->jsp
->WEB-INF->classes->source-><class file here>
first line of .java file:
package source;
JSP code:
<%@page import="java.sql.*, source.*, java.util.*;" %>
<jsp:useBean id="dbConnect" scope="session" class="source.DBConnect">
<jsp:getProperty name="dbConnect" property="jdbc:odbc:Auto_Intranet" />
</jsp:useBean>
Must I create an environment variable for 'Windows': with classpath " .....\WEB-INF\classes"
The Windows environment variable doesn't exist----using XP Pro

Looks right to me.
You don't need a classpath variable. Web containers ignore it anyway.
Which class is not found? source.DBConnect?
Is DBConnect in a package called source?
Is your database driver in the web-inf/lib directory?
Please post the full error message with stack trace - it will be easier to sort out.
Good luck,
evnafets

Install of latest Firefox upgrade won't complete, now having multiple problems and can't find how to revert back to previous mode.

I got a prompt to upgrade, but the install mechanism just keeps looping, says connecting but nothing ever happens. Daily I get warnings to install, and each effort ends as above. Now some of the prompt boxes (such as "are you sure you want to delete...") appear in subdued/basic mode. I was going to simply revert back to the previous edition that worked, but can't find how to do that.

I am having an issue with the Software Update also. The window says, "It is strongly recommended that you apply this update for Firefox as soon as possible"....It won't let me see the information of this update. I click on it as it highlights but nothing happens. So when I do click next it starts to update but updates all day long. It is not right. I thought maybe a virus? Could somebody tell me what to do? It is constantly happening everyday. thank You!!

JSP file cannot find the beans

Hi all,
My question is about Tomcat and JSP with Javabean.
I put my .jsp files under c:\tomcat\webapps\examples\jsp\Demo,
it works correctly, but when I add:
<jsp:useBean id="data" scope="session" class="DataBean" />
Where DataBean at:c:\tomcat\webapps\examples\WEB-INF\classes\DataBean.class
it throuws exception as follow:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 25 in the jsp file: /jsp/Demo/base.jsp
Generated servlet error:
C:\Tomcat\work\localhost\examples\jsp\Demo\base$jsp.java:60: Class org.apache.jsp.DataBean not found.
DataBean DataBean = null;
BTW:The DataBean.class compiled withou any error.
OS:WIN2000
Tomcat4.0
It looks like the Server can't find the class, but it exists.
Any suugestion?
Thanks!

Try putting the Bean in a package - for some reason Tomcat doesn't always find classes in the default package.
i.e. add a package statement to DataBean and change the useBean to include class="yourpackage.DataBean".
Hope this helps.

Help: error: can not find the main class!

when I run the class, the following error message comes up:
java.lang.NoClassDefFoundError: j2sdk1/4/1
and also a dialogue window (title is "java virtual machine launcher") comes up: could not find the main class, program will exit! After I click ok button, another error message shows up: Exception in thread "main" .
Could anyone help me figure out what's wrong with my program? If you need any other informaiton, please email me: [email protected], Thanks a lot!!!

Hi, thank you very much for your reply. Here is the program:
import java.sql.*;
import java.io.*;
import java.util.*;
import java.lang.Object;
public class CatalogConnect{
Statement stmt, st, mast, ques;
ResultSet rset, orgset,maset, quesset;
String organization = null;
String sponsor = null;
String interMethod = null;
String year = null;
String collection = null;
String country = null;
String countryName = null;
String archNO = null;
String codeBook = null;
String td = null;
String todate = null;
String month = null;
int studyID, quesID, sponsorID, orgID;
public CatalogConnect(){
connect();
makeXMLFile();
public CatalogConnect(String codeBk){
codeBook = codeBk;
connect();
makeXMLFile();
public void connect(){
try{
// DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
// Class.forName(oracle.jdbc.driver.OracleDriver);
Connection conn =
DriverManager.getConnection ("jdbc:oracle:thin:@137.99.37.146:1521:ipoll",
"catalog", "catalog");
stmt = conn.createStatement ();
st = conn.createStatement ();
mast = conn.createStatement ();
Connection conn2 =
DriverManager.getConnection ("jdbc:oracle:thin:@137.99.36.171:1521:ipolljr2",
"catalog", "catalog");
ques = conn2.createStatement ();
} catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
public static void main (String args[]){
CatalogConnect c = new CatalogConnect();
public void makeXMLFile() {
PrintWriter out = null;

Tomcat config problem: jsp can't find a bean class

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