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POHibernate Session Factory issue
 

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    <p>I am using hibernate 4 for building an application. While running the application I am getting the following error.</p> <blockquote> <p>Failed to create sessionFactory object.java.lang.NoSuchFieldError: TRACE Exception in thread "main" java.lang.NullPointerException</p> </blockquote> <p>My code snippet is,</p> <pre><code>try{ session = new DBConnection().getSession(); tx= session.beginTransaction(); ........ ........ }catch(HibernateException ex) { if (tx!=null) tx.rollback(); ex.printStackTrace(); session.close(); DBConnection.close(); } catch(Exception ex) { ex.printStackTrace(); session.close(); } finally{ session.close(); // The error is shown in this line while run time DBConnection.close(); } </code></pre> <p>DBConnection.java</p> <pre><code>public DBConnection() { try { Configuration configuration = new Configuration(); configuration.configure(); serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry(); factory = configuration.buildSessionFactory(serviceRegistry); } catch (Throwable ex) { System.err.println("Failed to create sessionFactory object." + ex); throw new ExceptionInInitializerError(ex); } } public Session getSession() { return factory.openSession(); } // Call this during shutdown public static void close() { factory.close(); } </code></pre> <p>My configuration file is :</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE hibernate-configuration SYSTEM "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"&gt; &lt;hibernate-configuration&gt; &lt;session-factory&gt; &lt;property name="hibernate.dialect"&gt; org.hibernate.dialect.MySQLDialect &lt;/property&gt; &lt;property name="hibernate.connection.driver_class"&gt; com.mysql.jdbc.Driver &lt;/property&gt; &lt;!-- Assume test is the database name --&gt; &lt;property name="hibernate.connection.url"&gt; jdbc:mysql://localhost:3306/test &lt;/property&gt; &lt;property name="hibernate.connection.username"&gt; root &lt;/property&gt; &lt;property name="hibernate.connection.password"&gt; test &lt;/property&gt; &lt;property name="show_sql"&gt;true&lt;/property&gt; &lt;property name="format_sql"&gt;true&lt;/property&gt; &lt;property name="use_sql_comments"&gt;false&lt;/property&gt; &lt;property name="hibernate.connection.pool_size"&gt;40&lt;/property&gt; &lt;/session-factory&gt; &lt;/hibernate-configuration&gt; </code></pre> <p>Please guide me what is wrong with the code or any jar file?</p> <p>**</p> <blockquote> <p>Answer: The log4j is the cause of this issue. I removed the Log4j and added log4j-1.2.16.jar. It gets fixed. Thanks!</p> </blockquote> <p>**</p>
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    1. COhow are you creating sessionFactory? where is you hibernate conf file located?
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    3. COIt is located in ROOT/WEB-INF/classes path
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