[jira] [Updated] (DUBBO-38) Built-in support for Circuit Breaker

["Huxing Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DUBBO-38?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Huxing Zhang updated DUBBO-38:
------------------------------
    Labels: GSoC2019  (was: )

> Built-in support for Circuit Breaker
> ------------------------------------
>
>                 Key: DUBBO-38
>                 URL: https://issues.apache.org/jira/browse/DUBBO-38
>             Project: Apache Dubbo
>          Issue Type: Task
>            Reporter: Huxing Zhang
>            Priority: Major
>              Labels: GSoC2019
>
> Providing mocked data for request is a key way to achieve stability and resiliency. 
> Currently, Dubbo supports service mock in the following aspects:
> 1. No matter what status the service provider, always return the mocked data
> 2. Calls the actual service provider, if it failed (after retried for several times), and return the mocked data.
> The above two strategies have their deficiencies, which is not intelligent enough to be able to do it automatically. The expected behavior is according to the statistics of invocation, decide to return mocked data or not at runtime.
> The objective of this idea is to provide a built-in light-weighted support for circuit breaker. Please refer to [Circuit Breaker](https://github.com/Netflix/Hystrix/wiki/How-it-Works#CircuitBreaker)
> To achieve this, one way is to extend the [Cluster](https://github.com/apache/incubator-dubbo/blob/master/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/Cluster.java) interface to implement a customized Cluster, and to extend the [Filter](https://github.com/apache/incubator-dubbo/blob/master/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/Filter.java) interface to get the invocation statistics.
> The difference between the built-in circuit breaker and 3rd party circuit breaker, e.g. hystrix, and sentinel, should be that the build-in support is light-weight and simple.



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