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meepo's Issues

集成Kryo时报错

现象:
集成kryo时,服务正常注册, 消费者可发现服务方, 但是调用服务的时候出现【com.alibaba.dubbo.rpc.RpcException: Failfast invoke providers ... 】. 切换成默认协议正常通讯。

跟踪:
从 DecodeableRpcInvocation 的 decode() 方法中, 抛出了【Found interface org.objectweb.asm.MethodVisitor, but class was expected】这样的错误。

原因:
master版本中的 jta-core 默认引入 cglib:cglib-2.2.2, 而我引入的 com.esotericsoftware:kryo:jar:4.0.0 依赖 org.ow2.asm:asm:jar:5.0.4, asm版本较低所导致。

方案:
将 jta-core 中的cglib 升级为 3.2.5 后, 运行正常。

如果用GTS的那种方法的话,就没有必要用XA了

XA 本身是可以保证数据的一致性的, 直接用普通的begin commit/rollback 就可以了。因为前置镜像和后置镜像以及 txc_lock可以在很大程度上保证资源不会被修改(也有可能通过命令行或者其他的发送绕过txc_lock检查的,这时候就可能数据不一致)。我觉得不需要数据库的XA。

基于@Configuration @Bean 的集成问题

我在Spring boot 中使用的是注解方式来获取ApplicationConfig, 但是启动的时候TransactionEndpointPostProcessor 中抛出异常。 跟踪后发现, 现有的写法不支持ConfigurationClassBeanDefination 。

ABA问题

刚开始看源码,回滚时候的ABA问题好像没处理,还是我没找到地方?--前面有锁逻辑,有空接着看下。估计跑的那次异常是其他原因。
先关闭吧。

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