Use of "Requires New" Transaction in Chunk Processing

One place to use @Transaction "requires new" is on the onXXXError listener methods (or on methods called from them) that fire on error events during chunk processing in Spring Batch because the current transaction might be rolled back (depending on any no-rollback-exceptions set):

With annotation based transaction handling you can put the annotation @Transactional(propagation=Propagation.REQUIRES_NEW) on the method to achieve this.

https://blog.codecentric.de/en/2012/03/transactions-in-spring-batch-part-2-restart-cursor-based-reading-and-listeners/

On LazyInitializationException - Example

Example given here: http://grails.github.io/grails-doc/2.3.11/guide/services.html

Review how it's possible to get this exception if a Hibernate session is closed via transaction rollback but the exception carries a pointer to the non-greedy loaded object. In the catch clause if the object's children are accessed a LazyInitializationException is thrown because the object is detached and it's lazy-loaded children are uninitialized.