# Hibernate 3 to 5 migration. SessionFactory does not pick up the mappings

**URL:** <https://discourse.hibernate.org/t/hibernate-3-to-5-migration-sessionfactory-does-not-pick-up-the-mappings/2628>\
**Category:** Hibernate ORM\
**Created:** [April 18, 2019, 9:51am UTC](https://discourse.hibernate.org/t/hibernate-3-to-5-migration-sessionfactory-does-not-pick-up-the-mappings/2628 "2019-04-18T09:51:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![javadee](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.hibernate.org/javadee/32/558_2.png) [@javadee](https://discourse.hibernate.org/u/javadee)\
**Post date:** [April 18, 2019, 9:51am UTC](https://discourse.hibernate.org/t/hibernate-3-to-5-migration-sessionfactory-does-not-pick-up-the-mappings/2628/1 "2019-04-18T09:51:36Z")

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Hi All,

I did not know about this forum till yesterday so created a new question on stackoverflow. I would really appreciate it if some one could have a look and either answer it here or in stackoverflow please?

Thanks 🙂

> <https://stackoverflow.com/questions/55732112/hibernate-3-x-to-hibernate-5-x-org-hibernate-mappingexception-unknown-entity>