BeanUtils.copyProperties 每次遇到集合时都会失败。

@Transactional
    public void createFreshAmendmentsForRestructureEvent(CcrRestructureEventMetadata restructureEventMetadata, String token, String racf) {
        List<Contract> contracts = getActiveContractsByRestructureEvent(restructureEventMetadata);

        if (isEmpty(contracts)) {
            log.info("No existing contract amendments found under the given restructure event [{}]...", restructureEventMetadata.getId());
        } else {
            // Create new Contract submission record
            contracts
                    .forEach(c -> {
                        Contract newContract = new Contract();
                        BeanUtils.copyProperties(c, newContract);
                        newContract.setRestructureEvent(restructureEventMetadata.getRestructureEvent());
                        newContract.setCreditStatus(restructureEventMetadata.getCreditStatus());
                        addNewContract(newContract, new java.util.Date(), token, racf);
                    });

            // Close existing contracts
            contracts.stream()
                    .peek(c -> c.setEffectiveToDt(new java.util.Date()))
                    .forEach(contractRepository::save);
        }
    }

例外情况：

Caused by: org.hibernate.HibernateException: Found shared references to a collection: com.rbs.zambezi.ccr.domain.Contract.contractPortfolioCodes

这是你的答案 Contract 具有集合引用的实体节：

...

    @OneToMany( fetch=FetchType.EAGER)
    @JoinColumn(name="CONTRACT_ID" )
    public Set<ContractPortfolioCode> contractPortfolioCodes;

...

有人能帮忙解决这个问题吗？