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core: Avoid PickFirstLeafLoadBalancer getting stuck in IDLE on address update (v1.86.x backport) - #13187
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kannanjgithub merged 1 commit intoNov 13, 2026
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…s update (grpc#13185) When `PickFirstLeafLoadBalancer` is in IDLE and `requestConnection()` is invoked (e.g., via `RequestConnectionPicker`), update `rawConnectivityState` to CONNECTING alongside `subchannelData.updateState(CONNECTING)`. This ensures that if `acceptResolvedAddresses()` runs before the subchannel asynchronously reports CONNECTING and removes the previous address, the load balancer continues connecting to the new address list instead of remaining wedged in IDLE. Fixes grpc#12395
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Backport of #13185 to v1.86.x.
When
PickFirstLeafLoadBalanceris in IDLE andrequestConnection()is invoked (e.g., viaRequestConnectionPicker), updaterawConnectivityStateto CONNECTING alongsidesubchannelData.updateState(CONNECTING). This ensures that ifacceptResolvedAddresses()runs before the subchannel asynchronously reports CONNECTING and removes the previous address, the load balancer continues connecting to the new address list instead of remaining wedged in IDLE.Fixes #12395