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Author Message
harshadmehta
 Post subject: Need help with Unable to load class issue
PostPosted: Sun Aug 01, 2010 7:29 pm 
Newbie

Joined: Sun Aug 01, 2010 6:38 pm
Posts: 2
Hi ,

I would appreciate any inputs on the error i am getting.
I deployed war file under weblogic 10.3 successfully, I get this error when i submit a form using Static html which has action as Servlet listed below.

org.hibernate.MappingException: Unable to load class declared as <mapping class="com.project.dblayer.Project"/> in the configuration:
............
java.lang.ClassNotFoundException: com.project.dblayer.Project
........

WEB-INF/classes should be visible so i am not sure why this error.



I am deploying this under weblogic 10.3.

---------------------------------------
web.xml-
...
<servlet>
<servlet-name>ptrackerServlet</servlet-name>
<servlet-class>com.ptracker.servlet.ptrackerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ptrackerServlet</servlet-name>
<url-pattern>/Project/ptrackerServlet</url-pattern>
</servlet-mapping>
....


---------------------------------------
hibernate.cfg.xml -
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.password">xxxxx</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@XXXX:1521:XE</property>
<property name="hibernate.connection.username">xxxxx</property>
<property name="hibernate.default_schema">xxxx</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>

<!-- Enable Hibernate's automatic session context management -->
<property name="connection.pool_size">1</property>

<mapping class="com.project.dblayer.Project" />
<mapping class="com.project.dblayer.ProjectId" />
<mapping class="com.project.dblayer.ProjectOwners" />
<mapping class="com.project.dblayer.ProjectOwnersId" />
<mapping class="com.project.dblayer.WeeklyStatus" />
<mapping class="com.project.dblayer.WeeklyStatusId" />
</session-factory>
</hibernate-configuration>


---------------------------------------
weblogic.xml - (Based on some comments added this file)
<?xml version="1.0" encoding="UTF-8"?>
<weblogic-web-app xmlns="http://www.bea.com/ns/weblogic/90" xmlns:j2ee="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.bea.com/ns/weblogic/90 http://www.bea.com/ns/weblogic/90/weblogic-web-app.xsd">
<container-descriptor>
<prefer-web-inf-classes>true</prefer-web-inf-classes>
</container-descriptor>
</weblogic-web-app>



---------------------------------------
Servlet Code -
package com.ptracker.servlet;

import java.io.IOException;

import javax.servlet.*;
import javax.servlet.http.*;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

import com.ptracker.dblayer.*;


public class ptrackerServlet extends HttpServlet {
SessionFactory sf= null;

public void init(){
sf = new AnnotationConfiguration().configure().buildSessionFactory();
}


public void doPost (HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String projectName = req.getParameter("pName");
Long projectId = Long.valueOf(req.getParameter("pId"));
String projectCode = req.getParameter("pCode");
String projectDesc = req.getParameter("pDesc");
String pOperation = req.getParameter("optSelected");

if (pOperation.equals("add")) {
try {
Session session = sf.openSession();
session.beginTransaction();
Project vProject = new Project();
vProject.setId(new ProjectId(projectId,projectCode));
vProject.setName(projectName);
vProject.setDescription(projectDesc);
session.save(vProject);
session.getTransaction().commit();
}
catch (Exception e) {
System.out.println(""+e);
}
}

}
}


---------------------------------------
Generated Hibernate code -

package com.ptracker.dblayer;
// Generated Jul 31, 2010 8:14:44 AM by Hibernate Tools 3.1.0.beta4

import java.util.HashSet;
import java.util.Set;
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.OneToMany;
import javax.persistence.Table;


/**
* Project generated by hbm2java
*/
@Entity
@Table(name="PROJECT"
, uniqueConstraints = { }
)

public class Project implements java.io.Serializable {


// Fields

private ProjectId id;
private String name;
private String description;
.........



---------------------------------------

Environment Details -
Eclipse 3.4.0
jdk/jre 1.6

jar file Details -
C:\workspace\ProjectTracker\dist>jar -tvf ptracker.war
0 Sun Aug 01 12:47:44 EDT 2010 META-INF/
102 Sun Aug 01 12:47:42 EDT 2010 META-INF/MANIFEST.MF
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/logiclayer/
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/servlet/
0 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/
3551 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/Employee.class
2287 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/Project.class
1198 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/ProjectId.class
3776 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/ProjectOwners.class
1537 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/ProjectOwnersId.class
2266 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/WeeklyStatus.class
2816 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/dblayer/WeeklyStatusId.class
1235 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/logiclayer/ProjectTest.class
1256 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/logiclayer/ProjectUpdate.class
2222 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/com/ptracker/servlet/ptrackerServlet.class
1341 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/classes/hibernate.cfg.xml
443432 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/antlr-2.7.6.jar
559366 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/commons-collections-3.1.jar
60841 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/commons-logging-1.1.1.jar
313898 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/dom4j-1.6.1.jar
279714 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/hibernate-annotations.jar
119292 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/hibernate-entitymanager-3.4.0.GA.jar
3916110 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/hibernate3.jar
1051818 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/javaee.jar
597476 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/javassist-3.9.0.GA.jar
134684 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/javax.persistence-2.0.0.jar
10899 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/jta-1.1.jar
23445 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/slf4j-api-1.5.8.jar
8817 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/slf4j-jdk14-1.5.8.jar
9679 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/lib/slf4j-log4j12-1.5.8.jar
830 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/web.xml
448 Sun Aug 01 12:47:44 EDT 2010 WEB-INF/weblogic.xml
459 Sun Aug 01 12:47:44 EDT 2010 ptracker.html


---------------------------------------
Trace logs -

http://localhost:7001/ptracker/ptracker.html
Accept-Language: en-us
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; InfoPath.2; MS-RTC LM 8)
Content-Length: 67
Connection: Keep-Alive
Cache-Control: no-cache

]] Root cause of ServletException.
org.hibernate.MappingException: Unable to load class declared as <mapping class="com.project.dblayer.Project"/> in the configuration:
at org.hibernate.cfg.AnnotationConfiguration.parseMappingElement(AnnotationConfiguration.java:650)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1647)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1626)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:1047)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:64)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1600)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:1035)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:64)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1520)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:1017)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:64)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1506)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:1011)
at com.ptracker.servlet.ptrackerServlet.init(Unknown Source)
at javax.servlet.GenericServlet.init(GenericServlet.java:241)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64)
at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:521)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:235)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3498)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
java.lang.ClassNotFoundException: com.project.dblayer.Project
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:283)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:256)
at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:54)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:176)
at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:42)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
at org.hibernate.cfg.AnnotationConfiguration.parseMappingElement(AnnotationConfiguration.java:647)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1647)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1626)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:1047)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:64)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1600)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:1035)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:64)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1520)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:1017)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:64)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1506)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:1011)
at com.ptracker.servlet.ptrackerServlet.init(Unknown Source)
at javax.servlet.GenericServlet.init(GenericServlet.java:241)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64)
at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:521)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:235)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3498)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
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harshadmehta
 Post subject: Re: Need help with Unable to load class issue
PostPosted: Mon Aug 02, 2010 12:10 pm 
Newbie

Joined: Sun Aug 01, 2010 6:38 pm
Posts: 2
Incorrect Path in the cfg file. This issue is resolved.
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