I have been doing some extensive tests with Paging and PagingWriter, and I found a few interligated issues:

• When the server is stopped, the IDGenerator could be used after the snapshot is generated, what could lead to data loss in case of a regular shutdown while system under heavy load

• delayed Transaction could be completed after exceptions (the markRollbackOnly or rollback should clear any pending state)

• The Acceptor notification is being called after the IDGenerator is stopped (found this by accident after stopping the IDGEnerator).