单选题
You notice that a job in a chain has not completed on a nonconstrained RAC database. Which of these are valid reasons why that might occur？（）
发布日期：2021-08-12
A
The job priority is 1 and the resource consumer group CPU emphasis allocation is a low percentage.
B
The job affinity is to a service and one node in that service is unavailable.
C
The job affinity is to an instance and that instance is unavailable.
D
There is no service affinity.
E
None of the above.
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