Do I have to close() every EntityManager?

Question

I have just started migrating my homegrown persistence framework to JPA.

Given that the persistence frameworks hide a lot of the plumbing, I\'m interested in knowing

Answer 1

I have obtained EntityManager using @PersistenceContext annotation in my repository. I can see that after the connectionpools reaches its maxPoolSize it does not get cleaned up.

However if I create EntityManager using EntityManagerFactory and call entitymanager.close() then connections are getting cleaned up. I am using c3p0 as connectionpool library.