The right kind of lazy ...

Hey,

I thought about starting this email with a joke about being as lazy as my entity associations.

But let's be honest

... nobody wants to read a lame joke.

So, let's better jump directly to the main topic and talk about the LazyInitializationException. It's one of the most common exceptions and clearly shows that something has gone wrong.

Hibernate throws it when you fetched an entity with a lazily fetched association and access that association outside of the transactional context that fetched the entity.

As I showed in this article, you have multiple options to fix this problem.

Unfortunately, there are also a few "fixes" you should better avoid. One of them is the open session in view anti-pattern used by Spring Boot. Another one is changing the FetchType to EAGER. (Yes, this is still suggested in some discussions on StackOverflow and other places.)

Speak soon,

Thorben

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