Question

我面临下面的问题 - 无法在Performance或更低的环境中重现它，但只有在Prod使得调试有点困难，因此如果我能得到一些线索在这里发布。试图让它尽可能短，但仍然很长..

问题：在两步订单创建过程中，即创建客户+提交订单 - 我们将获得唯一约束违规，其中单个客户ID被分配给在多个位置创建的订单。

不确定哪里出错了。我找不到的东西很少

Oracle在生成序列方面是独一无二的
Hibernate的默认分配大小为50，并且在术语上进行了相当优化发放那50个序列
这让我觉得可能有一些线程在实体拷贝时劫持了这个序列发生在某个地方，大约有下面两种方法。

Pom Entry如下所示，Spring / Hibernate堆栈的版本，数据库是Oracle

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>3.2.1.RELEASE</spring.version>
        <hibernate.version>4.1.10.Final</hibernate.version>
        <thymeleaf.version>2.1.0.RELEASE</thymeleaf.version>
        <tiles.version>2.2.2</tiles.version>
    </properties>

客户对象如下

@Entity
@Table(name = "CUSTOMER")
public class Customer implements Serializable {
    private static final long serialVersionUID = 1L;

    @SequenceGenerator(name="CUSTOMER_SEQUENCE_GENERATOR", 
        sequenceName="CUSTOMER_SEQ", allocationSize = 1)

    @Id
    @GeneratedValue(strategy=GenerationType.SEQUENCE, 
        generator="CUSTOMER_SEQUENCE_GENERATOR")
    @Column(name = "CUSTOMER_ID", unique = true, nullable = false)
    private Integer id;

从3个控制器和2个服务方法等各个地方调用此代码片段 - 可以说遍布整个代码。

 Customer customer = createCustomerEntity(newcustomer);
 customer = customerManagementDAO.addUpdateCustomer(customer);

以下两种方法的细节

我不确定以下代码中的某些内容是否在线程处理点出现错误

    private Customer createCustomerEntity(CustomerBean newcustomer) 
                 throws InternalBusinessException {
          Customer customer = null;
            try{
            // If Loop1
            if(newcustomer.getInternalcustomerid() == null){
                 customer = new Customer();
              customer.setCustomerNumber(newcustomer.getExternalSystemCustomerid());
            }
            // If Loop2
            if(newcustomer.getInternalcustomerid() != null){
                //if a new customer going for new  enrollment , 
                // we lookup up the customer in DB based on 
                // InternalCustomerId and merge the customer.
                Integer customerIdInternal = null;
                // Below Call goes to Internal Database to find existing Customer
                Customer customerEntity  = orderManagementDAO.findExistingCustomerByCustomerId(
                                newcustomer.getEoecustomerid().toString());
                if(customerEntity != null){
                customer = new Customer();  
                customer.setCustomerNumber(
                                newcustomer.getExternalSystemCustomerid()); 
                customerIdInternal = customerEntity.getId();
                if (customerIdInternal != null) {
                     customer.setId(customerIdInternal);
                }
            }
            //In case of customer look up if customer with same 
            // External System's id exists we merge the same customer.
            // If Loop3
if(newcustomer.getExternalSystemCustomerid() != null) {   
                // Below call goes to external System to find existing Customer Number
                Customer customerEntity = orderManagementDAO.findExistingCustomerByCustomerNumber(
                                newcustomer.getExternalSystemCustomerid().trim());
                Integer customerIdInternal = null;
                if(customerEntity != null) {
                    customer = new Customer();
                    customer.setCustomerNumber(
                                newcustomer.getExternalSystemCustomerid());
                    customerIdInternal = customerEntity.getId();
                 }
                if (customerIdInternal != null) {
                    customer.setId(customerIdInternal);
                }            
            }
            // End of If loop3
            customer.setEmail(newcustomer.getEmail()); //<== We have null pointers at this point in logs
            customer.setFirstName(newcustomer.getFirstname());
            customer.setLastName(newcustomer.getLastname());

            } catch (RuntimeException e) {
                throw new InternalBusinessException("createCustomerEntityForEOE failed", e);
            }
            return customer;
        }

日志显示在第2循环和第2循环中打印相同的客户ID。 Loop3在具有不同线程的多个实例中
在customer.setEmail的Loop3结束时出现空指针

Dao Code如下

@SuppressWarnings("unchecked")
    @Override
    public Customer addUpdateCustomer(Customer customer) 
            throws InternalDataAccessException {
        if (customer.getId() != null && customer.getId() != 0)
            saveMerge(customer);
        else
            save(customer);
        return customer;
    }

如果您觉得代码的其他部分可以为此问题增加清晰度，请告诉我。

Answer 1

此问题最终成为业务案例场景问题，并在整个创建客户流程移至Oracle DB中的存储产品时得到解决

我们有一个Table Cust #Reinquished从一个Range中取出Active Customer No，如果消耗了它们，则设置一些新的范围或者增加no并执行SaveMerge（）

这3个Hibernate查询步骤已更改为One Stored Proc，它运行正常。

这可能是Java线程还是Hibernate问题？

以下两种方法的细节

1 个答案: