Hibernate Error – Initial SessionFactory creation failed.java.lang.NoClassDefFoundError: com/mchange/v2/c3p0/DataSources

by

Hibernate’s “C3P0” connection pool error, this is caused by the missing dependency library – C3P0.


Initial SessionFactory creation failed.java.lang.NoClassDefFoundError: com/mchange/v2/c3p0/DataSources
Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.mkyong.persistence.HibernateUtil.buildSessionFactory(HibernateUtil.java:19)
	at com.mkyong.persistence.HibernateUtil.<clinit>(HibernateUtil.java:8)
	at com.mkyong.common.App.main(App.java:11)
Caused by: java.lang.NoClassDefFoundError: com/mchange/v2/c3p0/DataSources
	at org.hibernate.connection.C3P0ConnectionProvider.configure(C3P0ConnectionProvider.java:154)
	at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124)
	at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:56)
	at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:410)
	at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62)
	at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
	at com.mkyong.persistence.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
	... 2 more
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.DataSources
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	... 10 more

Solution

You can download the library here – http://www.mchange.com/projects/c3p0/

Or

Using Maven’s coordinate


        <dependency>
		<groupId>c3p0</groupId>
		<artifactId>c3p0</artifactId>
		<version>0.9.1.2</version>
	</dependency>

Follow up


How to configure the C3P0 connection pool in Hibernate

mkyong

Founder of Mkyong.com, passionate Java and open-source technologies. If you enjoy my tutorials, consider making a donation to these charities.

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WTF
11 years ago

I had the similar issue and i am not using maven.
I copied all the jars of lib/optional/c3p0 jars into the class path. They are basically only 3 thre and problem solved!!
I am using eclipse and i have made a user liberary for all hibernate jars. .

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co lega
12 years ago

This worked for me. Had 0.9.0 failed to work. Hibernate 4.1.8. Many thanks.

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roger
12 years ago

Ok for me (in Intellij) this meant that I needed to go and run maven install from the command line so that it would pull in the (apparently missing) dependencies, then all was well in IntelliJ land. IntelliJ problem probably.

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