About Tutorials

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1

javax.persistence.PersistenceException

the cause.   When I tried the tutorial example in a pure java project it worked fine. trying to use
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1

EntityManager getMetamodel() causes crash

I am trying to track down some obscure errors with multi-threading.  This involved looking at the EntityManager Metamodel but this caused an ObjectDB exception.  So I reverted to your example code in the tutorial (with class Point) and it works as expected: : (995, 995) (996, 996
Issue
1

auto-generated uuid fields

Hello, we're porting a JDO application to ObjectDB which uses uuid-hex generated values. However the page on generated values in your JPA tutorial only mentions numeric generated values, and when we try to use it the error message seems to imply that auto-generating strings isn't supported
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1

Database is erased after deploying a new web application version

/tutorial/jpa/eclipse/web/listener When the application is stopped by the Tomcat manager