Spring 3.1 entityManagerFactory java.lang.NoSuchFieldError: NULL Error

Question

I have just migrated Spring 3.0.5 to 3.1 GA. I faced runtime error during initialization:

org.springframework.beans.factory.BeanCreationException: Error crea         


        

Answer 1

This means there is a version mismatch--most likely with spring classes. So make sure all your spring jars are 3.1.0. Especially spring-expression. (Also upgrade your JPA provider (hibernate?) if it doesn't work after fixing spring)

Answer 2

It may help you. Upgrading from Spring 3.0.3.RELEASE results in: java.lang.NoSuchFieldError: USER_DECLARED_METHODS

Earlier I had like this

<dependencies>
<!-- Spring 3 dependencies -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>3.1.2.RELEASE</version>
</dependency>
...
</dependencies>

Then I added

<dependencies>
<!-- Spring 3 dependencies -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>3.1.2.RELEASE</version>
    <exclusions>
        <exclusion>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
        </exclusion>
    </exclusions>
</dependency>
...

</dependencies>