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https://issues.apache.org/jira/browse/DUBBO-12?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16501467#comment-16501467
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Jun Liu commented on DUBBO-12:
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Yes, still open and any contributions welcomed. 
I have filed an issue on Github, you can find more details here: 
https://github.com/apache/incubator-dubbo/issues/1888

> Heartbeat detection mechanism optimization
> ------------------------------------------
>
>                 Key: DUBBO-12
>                 URL: https://issues.apache.org/jira/browse/DUBBO-12
>             Project: Apache Dubbo
>          Issue Type: Improvement
>            Reporter: Jun Liu
>            Priority: Minor
>              Labels: GSoC2018, startLevel
>   Original Estimate: 504h
>  Remaining Estimate: 504h
>
> Heartbeat detection mechanism optimization
> * Is the current heartbeat detection mechanism reasonable? Currently works on 
> both provider side and consumer side.
> * Use wheel timer to refactor
> * Additional node blacklist?



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