Andrea Boriero Could you reopen this because I don't think that HHH-10443 fixed problems at SequenceInformationExtractorH2DatabaseImpl, SequenceInformationExtractorLegacyImpl nor JpaSchemaGenerator$ConnectionProviderJdbcConnectionAccess that I mentioned above.

They all are still missing a call to extractionContext.cleanup() and the last one would need a bit more refactoring so that JDBC would be obtained only when it's used (and cleaned up afterwards). The last one has actually been around from 4.x so I'd rather not be creating new issue for that