Proxy startup stalled by warming EDS clusters #38709
Description
https://prow.istio.io/view/gs/istio-prow/logs/integ-k8s-124_istio_postsubmit/1521489723254640640
What we see is version 6 is pushed, but version 9 is stuck warming. For ingress gw, it startsup since it completed with v6, but for egress v9 must have blocked the init.
2022-05-03T14:27:08.433846Z info ads ADS: new connection for node:istio-egressgateway-56cf788c86-x2x58.istio-system-2
2022-05-03T14:27:08.434802Z info ads CDS: PUSH request for node:istio-egressgateway-56cf788c86-x2x58.istio-system resources:18 size:18.1kB cached:0/17
2022-05-03T14:27:08.441481Z info ads Push debounce stable[8] 10 for config EnvoyFilter/istio-system/stats-filter-1.15 and 9 more configs: 100.201218ms since last change, 114.869484ms since last push, full=true
2022-05-03T14:27:08.446618Z info ads XDS: Pushing:2022-05-03T14:27:08Z/7 Services:6 ConnectedEndpoints:2 Version:2022-05-03T14:27:08Z/7
2022-05-03T14:27:08.447737Z info ads CDS: PUSH for node:istio-egressgateway-56cf788c86-x2x58.istio-system resources:18 size:18.1kB cached:0/17
2022-05-03T14:27:08.448289Z info ads EDS: PUSH request for node:istio-egressgateway-56cf788c86-x2x58.istio-system resources:17 size:2.0kB empty:1 cached:15/17
2022-05-03T14:27:09.036214Z info ads Push debounce stable[9] 10 for config EnvoyFilter/istio-system/tcp-stats-filter-1.12 and 9 more configs: 100.339244ms since last change, 109.692538ms since last push, full=true
2022-05-03T14:27:09.041912Z info ads XDS: Pushing:2022-05-03T14:27:09Z/8 Services:6 ConnectedEndpoints:2 Version:2022-05-03T14:27:09Z/8
2022-05-03T14:27:09.042957Z info ads CDS: PUSH for node:istio-egressgateway-56cf788c86-x2x58.istio-system resources:18 size:18.1kB cached:10/17
2022-05-03T14:27:09.043164Z info ads EDS: PUSH for node:istio-egressgateway-56cf788c86-x2x58.istio-system resources:17 size:2.0kB empty:0 cached:17/17
2022-05-03T14:27:09.274697Z info ads XDS: Pushing:2022-05-03T14:27:09Z/9 Services:6 ConnectedEndpoints:2 Version:2022-05-03T14:27:09Z/9
2022-05-03T14:27:09.275656Z info ads CDS: PUSH for node:istio-egressgateway-56cf788c86-x2x58.istio-system resources:18 size:18.3kB cached:8/17
No EDS request. Either envoy bug or Istio filters the request