getting error Invalid NamespaceHandler class org.springframework.data.jpa.repository.config.JpaRepositoryNameSpaceHandler - spring

Question

While running spring i am getting error that
Unexpected exception parsing XML document from class path resource
[spring/tx-annotation-app-context.xml]; nested exception
is org.springframework.beans.FatalBeanException: Invalid NamespaceHandler class
[org.springframework.data.jpa.repository.config.JpaRepositoryNameSpaceHandler]
for namespace [http://www.springframework.org/schema/data/jpa]: problem with
handler class file or dependent class; nested exception is
java.lang.NoClassDefFoundError:
org/springframework/data/repository/config/RepositoryConfigurationExtension
Here is my file
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa-1.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<description>Example configuration to get you started.</description>
....
</beans>
Here is the screen shot of my included jars
What i am doing wrong with the namespace ?
Thanks

Answer 1

I think the problem is your using spring-data-commons-core version 1.1 and spring-data-jpa version 1.2. Align the versions of these libraries.
Looking at a pom.xml file from one of my projects I see.
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.2.0.RELEASE</version>
</dependency>
and it uses spring-data-commons-core-1.4.0.RELEASE.jar
If you switch the packaging of spring-data-jpa to pom, it should download the necessary dependencies, then switch it back to jar.