ASF GitHub Bot commented on SCB-582:

liubao68 commented on a change in pull request #704: [SCB-582]Provide a way to 
protect instance removal

 File path: demo/demo-pojo/pojo-client/src/main/resources/microservice.yaml
 @@ -23,6 +23,12 @@ servicecomb:
+      instance:
+        healthCheck:
+          interval: 2
+        watch: false
+        empty:
 Review comment:
   Currently there are a lot of configurations not documented. I create a new 
issue to tracker this and will add docs after we have merged documents as 
[VOTE] done in email. 

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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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