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I am upgrading from Hibernate3 to Hibernate5. As a first step in the process I replaced the hibernate3.jar with hibernate-core-5.2.1.Final.jar. Also, updated the code that resulted in compile issues because of the jars change. However, when starting tomcat I see the following error:

Caused by: java.lang.UnsupportedClassVersionError: org/hibernate/service/ServiceRegistry : Unsupported major.minor version 52.0 (unable to load class org.hibernate.service.ServiceRegistry)

The major.minor error is not resulting from different versions of compile vs runtime on my local code. Error seems to be originating from Hibernate.

Does anyone know of a possible cause for this?

Also, in the existing hbm.xml files the DOCTYPE used is as follows. 

<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

Did anyone come across this error during upgrade before?

user811433
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1 Answers1

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The issue was happening because some classes in Hibernate - 5.2.1 needed Java 8 for functioning. I switched to Hibernate 5.1.0 and all worked well.

user811433
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