Comments (2)
liuyangming
commented on August 16, 2024
你所举的例子中，c的cancel会不会调用，要取决于：1）c的try操作是否执行；2）c的try操作所参与的事务是否提交。若二者都是，则执行c的cancel逻辑；若任一为否，则不执行c的cancel逻辑。
ByteTCC只保障confirm/cancel的幂等性。try阶段service的执行还处于业务系统的控制之中，ByteTCC无法得知一个service被多次调用是由于业务需要还是因重试导致，因此ByteTCC不提供try阶段service的幂等性保障。
ByteTCC通过接管spring的事务管理功能，可以精确的获取到每个事务的commit/rollback情况；通过拦截TCC型service的执行，可以将TCC型service与其参与的事务关联起来，从而获知具体某个TCC型service的执行是否有效（service执行并被提交）；结合ByteTCC的事务日志机制，因此，可以避免一个service（confirm/cancel）被重复执行多次。
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xiaoxiaDu
commented on August 16, 2024
赞, 非常感谢你的回答.
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Related Issues (20)
- 想请教一下 并发场景下Confirm/Cancel的幂等性是如何保证的？不使用mongo的情况下是基于数据库bytejta插入时的唯一约束xid吗？使用mongo时用的是基于MongoCompensableLock？ HOT 4
- confirm阶段不能调用feign HOT 1
- Cancel请求倒置时的极端情况 HOT 1
- 使用 DruidDataSource 启动异常 HOT 1
- A服务Try执行成功，B服务Try执行成功，在A服务中的confirm抛出一个异常，B服务没有confirm方法，然后A服务的confirm会重试，但是居然会执行B的cancel方法，测试发现 HOT 4
- 请教一下cleanupFile的用途 HOT 2
- Is this repo still being maintained? HOT 1
- 2021-08-14 15:00:32.444 ERROR 8516 --- [nio-7080-exec-5] o.b.bytetcc.CompensableTransactionImpl : forget-transaction: error occurred while forgetting xid: 1207-0a00270000090000017b4376501a000924f03746-0a00270000090000017b43764fd800067dec99d5 HOT 5
- 关于bytejta表 HOT 1
- 如果分布式事务的协调者没有执行本地数据库操作会抛异常 Illegal state: maybe the try phase operation has timed out! HOT 1
- 引用最新0.5.11版本后启动总是提示需要CuratorFramework HOT 6
- sharding-jdbc支持问题 HOT 1
- 框架防悬挂/幂等/空回滚如何处理的？ HOT 4
- bytetcc性能优化 HOT 2
- provider端如果在confirm中抛异常，会错误的执行provider端的cancel逻辑。 HOT 4
- 创建全局Xid重复问题 HOT 2
- springcloud环境, confirm逻辑中调用feign接口报错 HOT 1
- ByteTCC框架对于异常的捕获是如何处理的？
- 去除eureka使用nacos一直报错 HOT 2
- 集成之后，无法进行cancel调用及全局事务id获取
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