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

Question

I am developing an application with Hibernate and I get an Exception when I connect with database. The exception is:

Unable to instantiate default tuplizer [         


        

Answer 1

I was also facing the same issue.

Added the same dependency and it worked (like this):

<dependency>
    <groupId>javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.12.1.GA</version>
</dependency> 

Answer 2

According to the stack trace:

Caused by: java.lang.NoClassDefFoundError: javassist/util/proxy/ProxyObject at     java.lang.ClassLoader.defineClass1(Native Method)

The issue is caused by "java.lang.NoClassDefFoundError", so I think you should focus on this.

The direct solution is to add dependency

<dependency>
    <groupId>javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.12.1.GA</version>
</dependency>

to your pom.xml.

Answer 3

I know this post is old, but i ran in the same problem, and i solved it by simply changing my configuration from Java 11 down to Java 8.

Answer 4

In my case I had a Kotlin class with some fields which were not open so the generated Java setters and getters would be final. Solved it by adding open keyword to each field.

Before:

open class User(
    var id: String = "",
    var email: String = ""
)

After:

open class User(
    open var id: String = "",
    open var email: String = ""
)

Answer 5

When I ran into this error the fix was simple. I was simply missing a setter for a property. Make sure you define matching getters / setters for all your properties.

Answer 6

I had the same problem and resolved it adding this dependency.

<dependency>
    <groupId>javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.12.1.GA</version>
</dependency>   

I am using hibernate 3.6 version.