apache/dubbo

A new Cluster policy highlights short-circuit.

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#1,923 opened on Jun 12, 2018

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 (8 comments) (0 reactions) (0 assignees)Java (41,524 stars) (26,453 forks)batch import
help wantedtype/proposal

Description

Saying short-circuit, I means a fault tolerant concept in Hystrix.

I think we should support this feature internally in Dubbo. Cluster is a good Extension point to do this.

Contributor guide

Tech stack
java
Domain
backendapi
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
JavaUnderstanding of RPC frameworksFamiliarity with circuit breaker patternKnowledge of Apache Dubbo cluster extension
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Study the Hystrix circuit breaker concept as described in the link. Examine the Dubbo Cluster interface at dubbo cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Cluster.java. Review existing cluster implementations to understand the extension mechanism. Consider how to integrate a circuit breaker logic into the cluster invocation chain. There are no linked PRs, so start from scratch. The issue has been open since 2018 with some discussion, but no concrete proposal yet.