title: java.lang.ClassNotFoundException: org.apache.log4j.Level
body: <p>I'm trying to use hibernate 3.5.1 final in a swing application
  and here are the jars I'm using:</p>
  
  <ul>
  <li><strong>hibernate-core-3.5.1-Final</strong></li>
  <li><strong>hibernate-entitymanager-3.5.1-Final</strong></li>
  <li><strong>hibernate-jpa-2.0-api-1.0.0.Final</strong></li>
  <li><strong>hibernate-annotations-3.5.1-Final</strong></li>
  <li><strong>hibernate-commons-annotations-3.2.0.Final</strong></li>
  <li><strong>dom4j-1.6.1</strong></li>
  <li><strong>slf4j-api-1.6.4</strong></li>
  <li><strong>slf4j-log4j12-1.6.4</strong></li>
  </ul>
  
  <p>When I try to run the application, I get the following error:</p>
  
  <pre><code>Failed to instantiate SLF4J LoggerFactory
  Reported exception:
  java.lang.NoClassDefFoundError: org/apache/log4j/Level
      at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
      at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108)
      at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:279)
      at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252)
      at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:265)
      at org.hibernate.cfg.Configuration.&lt;clinit&gt;(Configuration.java:165)
      at org.hibernate.ejb.Ejb3Configuration.&lt;clinit&gt;(Ejb3Configuration.java:127)
      at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54)
      at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
      at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
      at com.xeno.xecamp.desktopManagement.Main.main(Main.java:16)
  Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level
      at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
      ... 11 more
  Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Level
      at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
      at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108)
      at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:279)
      at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252)
      at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:265)
      at org.hibernate.cfg.Configuration.&lt;clinit&gt;(Configuration.java:165)
      at org.hibernate.ejb.Ejb3Configuration.&lt;clinit&gt;(Ejb3Configuration.java:127)
      at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54)
      at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
      at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
      at com.xeno.xecamp.desktopManagement.Main.main(Main.java:16)
  Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level
      at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
  </code></pre>