WillemJiang commented on a change in pull request #704: [SCB-582]Provide a way to protect instance removal URL: https://github.com/apache/incubator-servicecomb-java-chassis/pull/704#discussion_r189133149
########## File path: service-registry/src/main/java/org/apache/servicecomb/serviceregistry/consumer/MicroserviceVersions.java ########## @@ -169,6 +166,28 @@ private void setInstances(List<MicroserviceInstance> pulledInstances, String rev } } + private List<MicroserviceInstance> mergeInstances(List<MicroserviceInstance> pulledInstances, + List<MicroserviceInstance> inUseInstances) { + List<MicroserviceInstance> upInstances = pulledInstances + .stream() + .filter(instance -> { + return MicroserviceInstanceStatus.UP.equals(instance.getStatus()); + }) + .collect(Collectors.toList()); + if (upInstances.isEmpty() && inUseInstances != null && ServiceRegistryConfig.INSTANCE.isEmptyInstanceProtectionEnabled()) { + MicroserviceInstancePing ping = SPIServiceUtils.getPriorityHighestService(MicroserviceInstancePing.class); + inUseInstances.stream() + .forEach(instance -> { + if (!upInstances.contains(instance)) { + if (ping.ping(instance)) { Review comment: As the ping method could take some time. It could take a while if there are lots of upInstances need to be merged. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services