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POTomcat 7, Hibernate 3.6, PostgreSQL 9.2 | Maven java.lang.NoClassDefFoundError
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  1. POTomcat 7, Hibernate 3.6, PostgreSQL 9.2 | Maven java.lang.NoClassDefFoundError
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    copied!<p>I am working on a bigger project, that needs to get maven'd. So far I have successfully tested the project by including all the required .jar files in the WEB-INF/lib.</p> <p>Libraries before maven:</p> <ul> <li>hibernate3.jar (Hibernate 3.6.Final)</li> <li>log4j.jar (1.2.8)</li> <li>postgresql-9.2-1002.jdbc4.jar (PostgreSQL 9.2 JDBC4)</li> <li>commons-codec1.8.jar (Apache Commons Codec 1.8)</li> <li>commons-fileupload1-3.jar (Apache Commons Fileupload 1.3)</li> <li>Commons-lang3-3-1 (Apache Commons Lang3 3.1)</li> <li>cos.jar (O'Reilly 05Nov2005)</li> </ul> <p>After /Configure/Convert To Maven I added all the dependencys:</p> <pre><code>&lt;dependencies&gt; &lt;!-- hibernate framework --&gt; &lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate-entitymanager&lt;/artifactId&gt; &lt;version&gt;3.6.10.Final&lt;/version&gt; &lt;/dependency&gt; &lt;!-- logging --&gt; &lt;dependency&gt; &lt;groupId&gt;org.slf4j&lt;/groupId&gt; &lt;artifactId&gt;slf4j-log4j12&lt;/artifactId&gt; &lt;version&gt;1.7.5&lt;/version&gt; &lt;/dependency&gt; &lt;!-- PostgreSQL-JDBC --&gt; &lt;dependency&gt; &lt;groupId&gt;org.postgresql&lt;/groupId&gt; &lt;artifactId&gt;postgresql&lt;/artifactId&gt; &lt;version&gt;9.2-1002-jdbc4&lt;/version&gt; &lt;/dependency&gt; &lt;!-- upload - O'reilly COS --&gt; &lt;dependency&gt; &lt;groupId&gt;servlets.com&lt;/groupId&gt; &lt;artifactId&gt;cos&lt;/artifactId&gt; &lt;version&gt;05Nov2002&lt;/version&gt; &lt;/dependency&gt; &lt;!-- Apache Commons --&gt; &lt;dependency&gt; &lt;groupId&gt;commons-codec&lt;/groupId&gt; &lt;artifactId&gt;commons-codec&lt;/artifactId&gt; &lt;version&gt;1.8&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;commons-fileupload&lt;/groupId&gt; &lt;artifactId&gt;commons-fileupload&lt;/artifactId&gt; &lt;version&gt;1.3&lt;/version&gt; &lt;/dependency&gt; &lt;/dependencies&gt; </code></pre> <p>to the project, but somehow always get an <strong>java.lang.NoClassDefFoundError</strong>:</p> <pre><code>java.lang.NoClassDefFoundError: Could not initialize class business.HibernateUtil business.HibernateEngine.searchBatch(HibernateEngine.java:168) business.HibernateEngine.searchBatch(HibernateEngine.java:163) business.PersonAdmin.searchUser(PersonAdmin.java:222) ui.login2.doGet(login2.java:161) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) </code></pre> <p>Both classes within the package business (HibernateUtil and HibernateEngine) set up the session used in the programme. Here it crashes in HibernateEngine (Line 167-169):</p> <pre><code>protected List searchBatch(String hqlQuery, boolean close) { Session session = HibernateUtil.currentSession(); Transaction tx = session.beginTransaction(); </code></pre> <p>I tried different versions of all libraries but still didn't make any progress. I found out that the <strong>java.lang.NoClassDefFoundError</strong> is often caused by multiple imported identical libraries. Could it be that it has something to do with the hibernate-core import? I checked its maven repository, but somehow i dont find any double libraries.</p> <p>Here my .classpath:</p> <p><a href="http://i43.tinypic.com/2wovi82.jpg" rel="nofollow noreferrer">a class path http://i43.tinypic.com/2wovi82.jpg</a></p> <p>I am really desperate and hope someone might have an idea!</p>
 

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