Adrian Smith's Blog

If you’ve ever tried to reuse a session in Hibernate you may have come across this exception… org.hibernate.SessionException: Session is closed! at org.hibernate.impl.AbstractSessionImpl.errorIfClosed(AbstractSessionImpl.java:49) at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1319) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301) at $Proxy0.beginTransaction(Unknown Source) …. The reason for this is that Hibernate is using “thread” managed sessions. [...]