[Solved] org.hibernate.HibernateException: No CurrentSessionContext configured

Hibernate requires a lot of configurations and sometimes you get weird exception and there is no clue that it’s because of some missing configuration.

org.hibernate.HibernateException: No CurrentSessionContext configured

I was working on a simple hibernate web application and getting below exception.

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org.hibernate.HibernateException: No CurrentSessionContext configured!
	org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:1012)
	com.journaldev.servlet.hibernate.GetEmployeeByID.doGet(GetEmployeeByID.java:31)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

When I looked at the source code, the statement that was throwing the exception was;

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Session session = sessionFactory.getCurrentSession();

My Hibernate configuration was like this:

hibernate.cfg.xml

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
		"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
		"http://hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="hibernate.connection.datasource">java:comp/env/jdbc/MyLocalDB</property>

        <!-- Mapping with model class containing annotations -->
	<mapping class="com.journaldev.servlet.hibernate.model.Employee"/>
    </session-factory>
</hibernate-configuration>

Fix for org.hibernate.HibernateException: No CurrentSessionContext configured

Everything looked fine to me and the exception didn’t clearly says what is missing.

After going through the SessionFactoryImpl, I found that we also need to configure the current session context class to get the current session.

This is done in method buildCurrentSessionContext() and it looks for property hibernate.current_session_context_class.

From the method body, it became clear that the value of this property should be:

1. jta for getting JTASessionContext
2. managed for ManagedSessionContext
3. thread for ThreadLocalSessionContext

The method also works if we provide above class name. So when I added this property in the hibernate configuration file, program started working fine.

Hibernate CurrentSessionContext class configuration example

Sample ways to define current_session_context_class property are:

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<property name="hibernate.current_session_context_class">thread</property>

Use below configuration if your hibernate configuration file is having xml format.

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<property name="hibernate.current_session_context_class">
org.hibernate.context.internal.ThreadLocalSessionContext
</property>

Thats’s all for fixing org.hibernate.HibernateException: No CurrentSessionContext configured. I hope it will save you some time.

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