ASF GitHub Bot commented on SCB-582:

coveralls commented on issue #704: [SCB-582]Provide a way to protect instance 
   Coverage decreased (-0.04%) to 87.306% when pulling 
**de3635f4ccf7f7144aae2d8f71383a37f51fee05 on liubao68:instance_protection** 
into **2f8de349d4b0b82d3dc14fcb9c94d3ae7046f9b5 on apache:master**.

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> Provide a way to protection for instance removal
> ------------------------------------------------
>                 Key: SCB-582
>                 URL: https://issues.apache.org/jira/browse/SCB-582
>             Project: Apache ServiceComb
>          Issue Type: New Feature
>          Components: Java-Chassis
>            Reporter: liubao
>            Assignee: liubao
>            Priority: Major
>             Fix For: java-chassis-1.0.0-m2
> In some applications, each microservice have fixed instances and rarely 
> change. But for some reason, heartbeat to service center is not stable. In 
> this scenario, instances will get lost and result in invocation failure. 
> To deal with this problem, we need to provide a way to protect instance 
> removal. That's when there is instance removal, we first check(ping)the 
> instance to see if it is reachable. If it's reachable, we don't remove it. 
> Since this protection is not fit for docker applications or scenarios where 
> instances are constantly removed and added, and resources(hosts ,ip, port) 
> are reused, this feature is an optional feature and users can open it when 
> necessary. 

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