As Mohammad Norouzi noticed there is connection leak then circular relationship exits.
This hapens because session is null before connection is released. (Session becomes null so there is not temporary session to close in final block of method withTemporarySessionIfNeeded - NPE is thrown)
I am attaching patch to fix this bug for 4.3.11 version ENABLE_LAZY_LOAD_NO_TRANS_connetion_leak.patch