hey, Anatoliy Balakirev thanks for reporting the issue and providing the code examples. Please see linked issues - https://hibernate.atlassian.net/browse/HV-1831 and https://hibernate.atlassian.net/browse/HV-1928

Looks like in your case you have a combination of both. You don’t really need to have @Valid unless you expect to do cascading validation (so places like private @Valid String currencyCode; shouldn’t use @Valid). And well the fact that you have a huge list of objects for cascading degrades the performance ( https://hibernate.atlassian.net/browse/HV-1831 should address that part)