Proxyless gRPC listener will be broken by delta #38916
Description
Bug Description
grpc/grpc-go#5354 has details - short version:
- grpc asks for listener 'inbound:...'
- grpc send a new discovery request for 'inboud:, cluster1'
- Istiod does a delta and only sends cluster1
- grpc no longer sees inbound - and disables the listener.
Version
master