# Hibernate Exception: Unable to instantiate default tuplizer

> Fix the Hibernate 'Unable to instantiate default tuplizer' exception. Common causes and solutions for this Java persistence error.

*Published September 22, 2009* · Categories: java

Source: https://www.kimpel.com/2009/09/22/hibernate-exception-unable-to-instantiate-default-tuplizer/


I just ran into an interesting exception within a Java project. I implemented a couple of Java classes along with hibernate mapping files. Until today, everything worked just fine.  

I then added some attributes/properties to a class and completed the mapping file. After deploying and testing the application I ran into the following hibernate exception:

org.hibernate.HibernateException: Unable to instantiate default tuplizer \[org.hibernate.tuple.entity.PojoEntityTuplizer\]

I really couldn't figure out what was wrong and tried almost everything. I just overlooked a little tiny detail: I misspelled a getter-method in the Java class and this led to the exception above.

Maybe it is just me, but this error message could really be a little bit more specific.