You are viewing a plain text version of this content. The canonical link for it is here.
Posted to notifications@skywalking.apache.org by GitBox <gi...@apache.org> on 2019/06/02 06:54:48 UTC
[GitHub] [skywalking] kezhenxu94 edited a comment on issue #2714: [WIP]Seata
Agent
kezhenxu94 edited a comment on issue #2714: [WIP]Seata Agent
URL: https://github.com/apache/skywalking/pull/2714#issuecomment-498004526
> @kezhenxu94 The rollback trace is not very clear to me. Could you explain more? In your scenario, which service triggers the rollback? I expect you could show the trace, one service fails, then TM/TC works together to make other services rollback too.
yes I'll elaborate more on this, in this example:
```java
@Override
@GlobalTransactional(timeoutMills = 300000, name = "dubbo-demo-tx")
public void purchase(String userId, String commodityCode, int orderCount) {
LOGGER.info("purchase begin ... xid: " + RootContext.getXID());
storageService.deduct(commodityCode, orderCount);
if (orderCount % 2 == 0) {
throw new IllegalArgumentException("xxx");
}
}
```
- the `business.purchase` throws exception after calling `storageService.deduct` but before the global transaction finished
- the exception triggers the `TransactionManager` (TM) to request (from TC) a rollback
- the `TransactionCoordinator` (TC) requests all the `ResourceManager`s to roll back
below the highlighted span is where the `RM` does the rollback operation (by doing some compensative operations) as the `TC` demanded
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
users@infra.apache.org
With regards,
Apache Git Services