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How bad is close EM always ?

Robert Siqueira
Ranch Hand

Joined: Jan 21, 2008
Posts: 38

I have the following entitymanager producer:

Is there any impact about always close the entitymanger after closed a transaction !??!!? Is there any performance issues ?


Bill Gorder

Joined: Mar 07, 2010
Posts: 1681

If you use dependency injection to get it using the @PersistenceContext annotation then you should not close it as this is handled for you. However if you are creating it from the factory as you are in your snippet then absolutely it is your responsibility to make sure it gets closed every time.

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subject: How bad is close EM always ?