haifeng niu created SCB-522:
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Summary: Compensation call could fail because of
CompensationContext is instance related
Key: SCB-522
URL: https://issues.apache.org/jira/browse/SCB-522
Project: Apache ServiceComb
Issue Type: Bug
Components: Saga
Affects Versions: saga-0.1.0
Reporter: haifeng niu
It's a critical situation, I could not provide a test case. But I can explain
it with an example:
We deploy two service instance A and B with same codebase. We usually do this
for high available.
If A did some operation, CompensationContext of A will cache instance of
service bean, than later it would be used in compensation call if error happens.
But if A crash, the coordinator (aka alpha) will call an backup service
instance, which is B, to compensate. Although there is no cached instance of
service bean in CompensationContext of B, so compensation fail.
We expect any instance of same service should process compensation
successfully, if it doesn't, it is a bug.
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