JIRA: https://jira.spring.io/browse/INT-4178 The `JdbcLockRegistry` does not retry `CannotSerializeTransactionException` thrown by `DefaultLockRepository.acquire` which in turn causes `LockRegistryLeaderInitiator`s thread to get stuck. * catch `CannotSerializeTransactionException` on `DefaultLockRepository.acquire` and ignore it to ensure a retry **Cherry-pick to 4.3.x**