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

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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

About Author

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Founder of Mkyong.com, love Java and open source stuff. Follow him on Twitter. If you like my tutorials, consider make a donation to these charities.

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WTF
9 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
9 years ago

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

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roger
10 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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