[loadbalancingexporter] Update k8sresolver handler to properly manage update events #36505
+91
−16
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Description
The load balancing exporter's k8sresolver was not handling update events properly. The
callbackfunction was being executed after cleanup of old endpoints and also after adding new endpoints. This causes exporter churn in the case of an event in which the lists contain shared elements. See the documentation for examples where the state might change but the IP Addresses would not, including the regular re-list events that might have zero changes.Link to tracking issue
Fixes #35658
May be related to #35810 as well.
Testing
Added tests for no-change onChange call.