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Service avalanche effect

2022-04-23 03:02:00 【Leon_ Jinhai_ Sun】

# 1. Service avalanche
- Service invocation between microservices is due to a service failure , The phenomenon leading to cascading service failure , It's called avalanche effect . The avalanche effect describes that the provider is not available , The process of causing the unavailability of consumers and gradually enlarging the unavailability .
# 2. Diagram avalanche effect
- If there is a call link as follows :

- And then ,Service A The amount of traffic fluctuates greatly , Traffic often increases abruptly ！ So in this case , Even if the Service A Can withstand a request ,Service B and Service C I'm not sure I can withstand this sudden request . here , If Service C Because I couldn't resist the request , Become unavailable . that Service B The request will also block , drained Service B Thread resources ,Service B It becomes unavailable . Then ,Service A It might not be available , This process is shown in the following figure

 

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